SlideShare uma empresa Scribd logo
1 de 7
Baixar para ler offline
CHEMISTRY
CALCULATIONS OF WATER OF
CRYSTALLISATION
Short revision series
AIM
 We are going to learn:
1. How to calculate percentage of water in
hydrated salts
2. Percentage of water of crystallisation
1. How to determine the formula of a salt
from the water of crystallisation
How to calculate percentage of water
in hydrated salts
 Question: Calculate the % of water in
hydrated MgSO4.5H2O salt crystals. (take
relative atomic masses of Mg = 24, S=32,
O=16, H = 1)
 SOLUTION:
 - First calculate the relative molecular
mass of MgSO4.5H2O = 24 + 32 + (4 x 16) +
(5 x (1 + 1 +16)
= 210
Solution cont.
Next, calculate the mass of 5H2O = 5 x 18 =
90
Therefore, the % of water is =
mass of water x 100
mass of MgSO4.5H2O
= 90/210 x 100
= 42.86%
How to calculate % of water of
crystallisation
 Question: Calculate the percentage of water of
crystallisation if 6.25g of CuSO4.xH2O (x
unknown) was heated gently until a mass of
4.00g is remaining. (take relative atomic masses
of Cu = 64, S=32, O=16, H = 1)
 SOLUTION:
 First calculate the mass difference = 6.25 – 4 =
2.25g (this is the mass of the water of
crystallisation)
 % of water of crystallisation = 2.25/6.25 x 100
= 36%
How to determine the formula of a
salt from the water of crystallisation
 Question: 6.25g of CuSO4.xH2O (x unknown)
was heated gently until a mass of 4.00g is
remaining. What is the formula of the salt?
(take relative atomic masses of Cu = 64,
S=32, O=16, H = 1)
 SOLUTION
After heating the mass of salt left is 4.00g,
while mass of water of crystallisation is mass
that was given off or lost, i.e 6.25 – 4 = 2.25g
SOLUTION CONT
The mass ratio CuSO4 and H2O = 4 : 2.25
Convert from mass ratio to mole ratio by
dividing the mass by their molecular mass of
each
Molecular mass of CuSO4 =160; while H2O=18
Mole ratio CuSO4 : H2O =4/160 : 2.25/18
= 0.025 : 0.125. *(divide by the smallest i.e
0.025) = 1 : 5
So the formula of the salt is CuSO4.5H2O

Mais conteúdo relacionado

Mais procurados

06 microscale titration_fa06
06 microscale titration_fa0606 microscale titration_fa06
06 microscale titration_fa06genchemlab
 
Guía de ejercicios - Análisis Químico - Unidad II
Guía de ejercicios - Análisis Químico - Unidad IIGuía de ejercicios - Análisis Químico - Unidad II
Guía de ejercicios - Análisis Químico - Unidad IIJosé Luis Castro Soto
 
Revision acid base with answers
Revision acid base with answersRevision acid base with answers
Revision acid base with answersMRSMPC
 
SPM FAVOURITE QUESTIONS
SPM FAVOURITE QUESTIONSSPM FAVOURITE QUESTIONS
SPM FAVOURITE QUESTIONSandromendas
 
IB Chemistry Titration Techniques and IA on Titration
IB Chemistry Titration Techniques and IA on TitrationIB Chemistry Titration Techniques and IA on Titration
IB Chemistry Titration Techniques and IA on TitrationLawrence kok
 
Tutorial 2 part 2 answer key
Tutorial 2   part 2 answer keyTutorial 2   part 2 answer key
Tutorial 2 part 2 answer keyRijal Zuki
 

Mais procurados (12)

6 estudio soluciones jel
6 estudio soluciones  jel6 estudio soluciones  jel
6 estudio soluciones jel
 
Chapter 8 Salt part 3
Chapter 8 Salt part 3Chapter 8 Salt part 3
Chapter 8 Salt part 3
 
#13 Key
#13 Key#13 Key
#13 Key
 
06 microscale titration_fa06
06 microscale titration_fa0606 microscale titration_fa06
06 microscale titration_fa06
 
Chapter 8 salt part 5
Chapter 8 salt part 5Chapter 8 salt part 5
Chapter 8 salt part 5
 
Limiting reagents
Limiting reagentsLimiting reagents
Limiting reagents
 
Guía de ejercicios - Análisis Químico - Unidad II
Guía de ejercicios - Análisis Químico - Unidad IIGuía de ejercicios - Análisis Químico - Unidad II
Guía de ejercicios - Análisis Químico - Unidad II
 
Revision acid base with answers
Revision acid base with answersRevision acid base with answers
Revision acid base with answers
 
SPM FAVOURITE QUESTIONS
SPM FAVOURITE QUESTIONSSPM FAVOURITE QUESTIONS
SPM FAVOURITE QUESTIONS
 
IB Chemistry Titration Techniques and IA on Titration
IB Chemistry Titration Techniques and IA on TitrationIB Chemistry Titration Techniques and IA on Titration
IB Chemistry Titration Techniques and IA on Titration
 
Tutorial 2 part 2 answer key
Tutorial 2   part 2 answer keyTutorial 2   part 2 answer key
Tutorial 2 part 2 answer key
 
Neutralization
NeutralizationNeutralization
Neutralization
 

Destaque

Viralité de contenu vs viralité de mécanique
Viralité de contenu vs viralité de mécaniqueViralité de contenu vs viralité de mécanique
Viralité de contenu vs viralité de mécaniqueErwan Le Nagard
 
mkombe munga cv use
mkombe munga cv usemkombe munga cv use
mkombe munga cv usemkombe munga
 
цікавинки географії
цікавинки географіїцікавинки географії
цікавинки географіїartischenkonatalia
 
Prueba II Flor Ruiz Reategui
Prueba II Flor Ruiz ReateguiPrueba II Flor Ruiz Reategui
Prueba II Flor Ruiz ReateguiFlor Ruiz
 
Impact of Broadband on Development - By: Dr. Fereydoun Ghasemzadeh
Impact of Broadband on Development - By: Dr. Fereydoun GhasemzadehImpact of Broadband on Development - By: Dr. Fereydoun Ghasemzadeh
Impact of Broadband on Development - By: Dr. Fereydoun GhasemzadehAfra PR
 
Екскурсія до сирзаводу
Екскурсія до сирзаводуЕкскурсія до сирзаводу
Екскурсія до сирзаводуartischenkonatalia
 
Evaluation December 2014
Evaluation December 2014Evaluation December 2014
Evaluation December 2014Arsen Tomic
 
For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...
For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...
For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...Karin Britt Keighley-Leppik
 
Λόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, Μεθοδολογία
Λόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, ΜεθοδολογίαΛόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, Μεθοδολογία
Λόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, ΜεθοδολογίαΚΠΕ Πεταλούδων Ρόδου
 

Destaque (18)

Viralité de contenu vs viralité de mécanique
Viralité de contenu vs viralité de mécaniqueViralité de contenu vs viralité de mécanique
Viralité de contenu vs viralité de mécanique
 
mkombe munga cv use
mkombe munga cv usemkombe munga cv use
mkombe munga cv use
 
цікавинки географії
цікавинки географіїцікавинки географії
цікавинки географії
 
Distrib. books
Distrib. booksDistrib. books
Distrib. books
 
Prueba II Flor Ruiz Reategui
Prueba II Flor Ruiz ReateguiPrueba II Flor Ruiz Reategui
Prueba II Flor Ruiz Reategui
 
Impact of Broadband on Development - By: Dr. Fereydoun Ghasemzadeh
Impact of Broadband on Development - By: Dr. Fereydoun GhasemzadehImpact of Broadband on Development - By: Dr. Fereydoun Ghasemzadeh
Impact of Broadband on Development - By: Dr. Fereydoun Ghasemzadeh
 
Екскурсія до сирзаводу
Екскурсія до сирзаводуЕкскурсія до сирзаводу
Екскурсія до сирзаводу
 
Evaluation December 2014
Evaluation December 2014Evaluation December 2014
Evaluation December 2014
 
Mark Griffin Laspinas
Mark Griffin LaspinasMark Griffin Laspinas
Mark Griffin Laspinas
 
Unidad 7 shileshare
Unidad 7 shileshareUnidad 7 shileshare
Unidad 7 shileshare
 
Refactoring
RefactoringRefactoring
Refactoring
 
For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...
For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...
For robertbothwell and_harveymaccormack_paulattemann_kantzow_dulles_habsburg_...
 
Financialinstitutions
FinancialinstitutionsFinancialinstitutions
Financialinstitutions
 
CV
CVCV
CV
 
Mother05
Mother05Mother05
Mother05
 
Λόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, Μεθοδολογία
Λόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, ΜεθοδολογίαΛόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, Μεθοδολογία
Λόη Ποθητή - Προγράμματα Περιβαλλοντικής Εκπαίδευσης Σχεδιασμός, Μεθοδολογία
 
OTKINGS TEMPLATE
OTKINGS TEMPLATEOTKINGS TEMPLATE
OTKINGS TEMPLATE
 
Additional Photography
Additional PhotographyAdditional Photography
Additional Photography
 

Semelhante a Calculationsofwaterofcrystallisation

Ch4z5ereactions 110115225323-phpapp01
Ch4z5ereactions 110115225323-phpapp01Ch4z5ereactions 110115225323-phpapp01
Ch4z5ereactions 110115225323-phpapp01Cleophas Rwemera
 
Ch4 z5e reactions
Ch4 z5e reactionsCh4 z5e reactions
Ch4 z5e reactionsblachman
 
Estimation of oxalic acid experimental data
Estimation of oxalic acid experimental dataEstimation of oxalic acid experimental data
Estimation of oxalic acid experimental dataMithil Fal Desai
 
The Nature of Solution
The Nature of SolutionThe Nature of Solution
The Nature of SolutionAdmin Jan
 
CHEMICAL-ANALYSIS.pdf
CHEMICAL-ANALYSIS.pdfCHEMICAL-ANALYSIS.pdf
CHEMICAL-ANALYSIS.pdfbonitorhen
 
Solubility and precipitation equilibrium .pptx
Solubility and precipitation equilibrium .pptxSolubility and precipitation equilibrium .pptx
Solubility and precipitation equilibrium .pptxFatmaBITAM
 
Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution
Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution
Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution Rai University
 
4,reaction in aq.solution
4,reaction in aq.solution4,reaction in aq.solution
4,reaction in aq.solutionعلي علي
 
Lect w9 152 - buffers and ksp_alg
Lect w9 152 - buffers and ksp_algLect w9 152 - buffers and ksp_alg
Lect w9 152 - buffers and ksp_algchelss
 
Ch 12 Physical Properties of Solutions.ppt
Ch 12 Physical Properties of Solutions.pptCh 12 Physical Properties of Solutions.ppt
Ch 12 Physical Properties of Solutions.pptssuser8900291
 
Mole concept numerical ..........
Mole concept numerical ..........Mole concept numerical ..........
Mole concept numerical ..........ITC Limited
 
Quantitative analysis - C3.2 ( by heba )
Quantitative analysis - C3.2 ( by heba ) Quantitative analysis - C3.2 ( by heba )
Quantitative analysis - C3.2 ( by heba ) Hebaalrifai
 
IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.
IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.
IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.Lawrence kok
 
PHYSICAL CHEMISTRY 1.5-SOLUBILITY
PHYSICAL CHEMISTRY 1.5-SOLUBILITYPHYSICAL CHEMISTRY 1.5-SOLUBILITY
PHYSICAL CHEMISTRY 1.5-SOLUBILITYshahzadebaujiti
 

Semelhante a Calculationsofwaterofcrystallisation (20)

Ch4z5ereactions 110115225323-phpapp01
Ch4z5ereactions 110115225323-phpapp01Ch4z5ereactions 110115225323-phpapp01
Ch4z5ereactions 110115225323-phpapp01
 
Ch4 z5e reactions
Ch4 z5e reactionsCh4 z5e reactions
Ch4 z5e reactions
 
Estimation of oxalic acid experimental data
Estimation of oxalic acid experimental dataEstimation of oxalic acid experimental data
Estimation of oxalic acid experimental data
 
The Nature of Solution
The Nature of SolutionThe Nature of Solution
The Nature of Solution
 
CHEMICAL-ANALYSIS.pdf
CHEMICAL-ANALYSIS.pdfCHEMICAL-ANALYSIS.pdf
CHEMICAL-ANALYSIS.pdf
 
Solubility and precipitation equilibrium .pptx
Solubility and precipitation equilibrium .pptxSolubility and precipitation equilibrium .pptx
Solubility and precipitation equilibrium .pptx
 
Lab 3
Lab 3Lab 3
Lab 3
 
Lab 3
Lab 3Lab 3
Lab 3
 
Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution
Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution
Diploma_I_Applied science(chemistry)_U-II(A) Preparation of solution
 
4,reaction in aq.solution
4,reaction in aq.solution4,reaction in aq.solution
4,reaction in aq.solution
 
V4OQ2BFgESYNczkHR2GX.pdf
V4OQ2BFgESYNczkHR2GX.pdfV4OQ2BFgESYNczkHR2GX.pdf
V4OQ2BFgESYNczkHR2GX.pdf
 
Lect w9 152 - buffers and ksp_alg
Lect w9 152 - buffers and ksp_algLect w9 152 - buffers and ksp_alg
Lect w9 152 - buffers and ksp_alg
 
Ch 12 Physical Properties of Solutions.ppt
Ch 12 Physical Properties of Solutions.pptCh 12 Physical Properties of Solutions.ppt
Ch 12 Physical Properties of Solutions.ppt
 
Mole concept numerical ..........
Mole concept numerical ..........Mole concept numerical ..........
Mole concept numerical ..........
 
Quantitative analysis - C3.2 ( by heba )
Quantitative analysis - C3.2 ( by heba ) Quantitative analysis - C3.2 ( by heba )
Quantitative analysis - C3.2 ( by heba )
 
IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.
IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.
IB Chemistry on Redox Titration, Biological Oxygen Demand and Redox.
 
17 stoichiometry
17 stoichiometry17 stoichiometry
17 stoichiometry
 
PHYSICAL CHEMISTRY 1.5-SOLUBILITY
PHYSICAL CHEMISTRY 1.5-SOLUBILITYPHYSICAL CHEMISTRY 1.5-SOLUBILITY
PHYSICAL CHEMISTRY 1.5-SOLUBILITY
 
17 stoichiometry
17 stoichiometry17 stoichiometry
17 stoichiometry
 
Balancing equations
Balancing equationsBalancing equations
Balancing equations
 

Mais de Conferat Conferat (20)

Cellbiologybiolog
CellbiologybiologCellbiologybiolog
Cellbiologybiolog
 
Salts
SaltsSalts
Salts
 
Acids,basesandsalts acids
Acids,basesandsalts   acidsAcids,basesandsalts   acids
Acids,basesandsalts acids
 
Atomic sructureandbonding
Atomic sructureandbondingAtomic sructureandbonding
Atomic sructureandbonding
 
Gaslawsprep
GaslawsprepGaslawsprep
Gaslawsprep
 
Chemicalcombinationsmoles,molecularandempirical
Chemicalcombinationsmoles,molecularandempiricalChemicalcombinationsmoles,molecularandempirical
Chemicalcombinationsmoles,molecularandempirical
 
Chemicalcombinationsbalancingchemeqns
ChemicalcombinationsbalancingchemeqnsChemicalcombinationsbalancingchemeqns
Chemicalcombinationsbalancingchemeqns
 
Separationof mixtures andpurification of chemicalsubstances
Separationof mixtures andpurification of chemicalsubstancesSeparationof mixtures andpurification of chemicalsubstances
Separationof mixtures andpurification of chemicalsubstances
 
Work,energyandpower
Work,energyandpowerWork,energyandpower
Work,energyandpower
 
WavesPREPWALK
WavesPREPWALKWavesPREPWALK
WavesPREPWALK
 
Unitsandmeasurements
UnitsandmeasurementsUnitsandmeasurements
Unitsandmeasurements
 
Thermalexpansion
ThermalexpansionThermalexpansion
Thermalexpansion
 
Temperatureanditsmeasurement
TemperatureanditsmeasurementTemperatureanditsmeasurement
Temperatureanditsmeasurement
 
Soundwaves
SoundwavesSoundwaves
Soundwaves
 
Simpleharmonicmotion
SimpleharmonicmotionSimpleharmonicmotion
Simpleharmonicmotion
 
Refractionoflight onplanesurfacescurved
Refractionoflight onplanesurfacescurvedRefractionoflight onplanesurfacescurved
Refractionoflight onplanesurfacescurved
 
Reflection of light at plane or curved surfaces
Reflection of light at plane or curved surfacesReflection of light at plane or curved surfaces
Reflection of light at plane or curved surfaces
 
Projectiles
ProjectilesProjectiles
Projectiles
 
Pressure
PressurePressure
Pressure
 
Newton’s laws of motion
Newton’s laws of motionNewton’s laws of motion
Newton’s laws of motion
 

Último

Education and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxEducation and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxraviapr7
 
Latin American Revolutions, c. 1789-1830
Latin American Revolutions, c. 1789-1830Latin American Revolutions, c. 1789-1830
Latin American Revolutions, c. 1789-1830Dave Phillips
 
CAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptxCAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptxSaurabhParmar42
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice documentXsasf Sfdfasd
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationMJDuyan
 
How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17Celine George
 
Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.EnglishCEIPdeSigeiro
 
Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxDr. Asif Anas
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17Celine George
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxKatherine Villaluna
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17Celine George
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17Celine George
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptxmary850239
 
HED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfHED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfMohonDas
 
Human-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesHuman-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesMohammad Hassany
 
How to Filter Blank Lines in Odoo 17 Accounting
How to Filter Blank Lines in Odoo 17 AccountingHow to Filter Blank Lines in Odoo 17 Accounting
How to Filter Blank Lines in Odoo 17 AccountingCeline George
 
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfMaximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfTechSoup
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxDr. Santhosh Kumar. N
 

Último (20)

Personal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdfPersonal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
 
Education and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxEducation and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptx
 
Latin American Revolutions, c. 1789-1830
Latin American Revolutions, c. 1789-1830Latin American Revolutions, c. 1789-1830
Latin American Revolutions, c. 1789-1830
 
CAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptxCAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptx
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice document
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive Education
 
How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17
 
Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.
 
Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptx
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptx
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptx
 
Finals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quizFinals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quiz
 
HED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfHED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdf
 
Human-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesHuman-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming Classes
 
How to Filter Blank Lines in Odoo 17 Accounting
How to Filter Blank Lines in Odoo 17 AccountingHow to Filter Blank Lines in Odoo 17 Accounting
How to Filter Blank Lines in Odoo 17 Accounting
 
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfMaximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptx
 

Calculationsofwaterofcrystallisation

  • 1. CHEMISTRY CALCULATIONS OF WATER OF CRYSTALLISATION Short revision series
  • 2. AIM  We are going to learn: 1. How to calculate percentage of water in hydrated salts 2. Percentage of water of crystallisation 1. How to determine the formula of a salt from the water of crystallisation
  • 3. How to calculate percentage of water in hydrated salts  Question: Calculate the % of water in hydrated MgSO4.5H2O salt crystals. (take relative atomic masses of Mg = 24, S=32, O=16, H = 1)  SOLUTION:  - First calculate the relative molecular mass of MgSO4.5H2O = 24 + 32 + (4 x 16) + (5 x (1 + 1 +16) = 210
  • 4. Solution cont. Next, calculate the mass of 5H2O = 5 x 18 = 90 Therefore, the % of water is = mass of water x 100 mass of MgSO4.5H2O = 90/210 x 100 = 42.86%
  • 5. How to calculate % of water of crystallisation  Question: Calculate the percentage of water of crystallisation if 6.25g of CuSO4.xH2O (x unknown) was heated gently until a mass of 4.00g is remaining. (take relative atomic masses of Cu = 64, S=32, O=16, H = 1)  SOLUTION:  First calculate the mass difference = 6.25 – 4 = 2.25g (this is the mass of the water of crystallisation)  % of water of crystallisation = 2.25/6.25 x 100 = 36%
  • 6. How to determine the formula of a salt from the water of crystallisation  Question: 6.25g of CuSO4.xH2O (x unknown) was heated gently until a mass of 4.00g is remaining. What is the formula of the salt? (take relative atomic masses of Cu = 64, S=32, O=16, H = 1)  SOLUTION After heating the mass of salt left is 4.00g, while mass of water of crystallisation is mass that was given off or lost, i.e 6.25 – 4 = 2.25g
  • 7. SOLUTION CONT The mass ratio CuSO4 and H2O = 4 : 2.25 Convert from mass ratio to mole ratio by dividing the mass by their molecular mass of each Molecular mass of CuSO4 =160; while H2O=18 Mole ratio CuSO4 : H2O =4/160 : 2.25/18 = 0.025 : 0.125. *(divide by the smallest i.e 0.025) = 1 : 5 So the formula of the salt is CuSO4.5H2O