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WWEELLCCOOMMEE
EELLEECCTTRROOLLYYSSIISS 
OOFF WWAATTEERR
AAIIMM OOFF TTHHEE EEXXPPEERRIIMMEENNTT 
TToo pprroovvee tthhaatt 
• WWaatteerr iiss mmaaddee uupp ooff oonnee mmoolleeccuullee ooff 
ooxxyyggeenn aanndd ttwwoo mmoolleeccuulleess ooff HHyyddrrooggeenn 
ii..ee.. HH22OO .. 
• BByy PPaassssiinngg eelleeccttrriicc ccuurrrreenntt tthhrroouugghh 
wwaatteerr, ooxxyyggeenn aanndd HHyyddrrooggeenn ccaann bbee 
sseeppaarraatteedd
IInnssttrruummeennttss RReeqquuiirreedd 
ii)) OOnnee bbaasseelleessss bbrrooaadd mmoouutthheedd ssaalliinnee wwaatteerr 
bboottttllee 
iiii)) 22 nnoo ssttaaiinnlleessss sstteeeell rrooddss oorr 22 aalluummiinnuumm wwiirreess.. 
iiiiii)) CCoorrkk ooff tthhee ssaalliinnee wwaatteerr bboottttllee.. 
iivv)) SSooddaa –– bbii –– ccrraabb.... 
vv)) WWaatteerr.. 
vviiii)) CCooppppeerr wwiirree 
vviiiiii)) 22 tteesstt ttuubbeess ooff eeqquuaall ssiizzee aanndd sshhaappee.. 
iixx)) BBaatttteerryy ooff 66 vvoollttss.. 
xx)) SSttaanndd wwiitthh rriinngg..
EEXXPPEERRIIMMEENNTT 
• TTaakkee aa ssttaanndd wwiitthh rriinngg 
• PPuutt tthhee SSaalliinnee wwaatteerr 
bboottttllee iinnvveerrtteedd iinn tthhee 
ssttaanndd
• FFiillll wwaatteerr iinn tthhee bboottttllee.. 
• PPuutt ssoommee SSooddaa--bbii-- 
ccaarrbb iinn wwaatteerr..
• FFiixx tthhee sstteeeell rrooddss aass 
sshhoowwnn iinn tthhee ffiigguurree 
aanndd ccoonnnneecctt tthheemm 
wwiitthh tthhee ccooppppeerr wwiirree 
ttoo tthhee BBaatttteerryy ..
• WWee oobbsseerrvvee ssoommee 
ggaass bbuubbbblleess ccoommiinngg 
oouutt..
• TTaakkee ttwwoo tteesstt ttuubbeess 
• PPuutt tthheemm oonn tthhee rrooddss 
iinnvveerrtteedd bbyy ttaakkiinngg 
ccaarree tthhaatt tthheerree iiss nnoo 
aaiirr iinn tthheemm..
• WWhheenn tthhee ccuurrrreenntt iiss 
ppaasssseedd wwee oobbsseerrvvee 
tthhaatt ssoommee ggaass iiss 
ccoolllleecctteedd iinn tthhee tteesstt 
ttuubbeess.. 
• WWhheenn mmeeaassuurreedd ,, wwee 
ffiinndd tthhee lleennggtthh ooff oonnee 
ggaass lleevveell iiss ddoouubbllee 
tthhaann tthhee ootthheerr
• AAggaaiinn wwee ppaassss tthhee 
ccuurrrreenntt aanndd lleett tthhee 
tteesstt ttuubbeess ffuullllyy ffiilllleedd 
wwiitthh ggaass
• TTaakkee oouutt tthhee ttuubbee 
wwhhiicchh iiss ffiirrsstt ffiilllleedd 
• WWhheenn aa bbuurrnniinngg 
mmaattcchh ssttiicckk iiss bbrroouugghhtt 
nneeaarr,, iitt bbuurrnnss wwiitthh aa 
ppoopp ssoouunndd
• WWHHEENN WWEE BBRRIINNGG 
TTHHEE MMAATTCCHH SSTTIICCKK 
NNEEAARR TTHHEE SSEECCOONNDD 
tteesstt ttuubbee TTHHEE 
MMAATTCCHHSSTTIICCKK 
BBUURRNNSS WWIITTHH MMOORREE 
FFOORRCCEE
CCOONNCCLLUUSSIIOONN 
• WWaatteerr iiss mmaaddee uupp ooff 22 ppaarrttss ooff hhyyddrrooggeenn 
oonnee ppaarrtt ooxxyyggeenn .. 
WWAATTEERR HH22++OO==HH22OO
TTHHAANNKK YYOOUU

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Electrolysis of water

  • 3. AAIIMM OOFF TTHHEE EEXXPPEERRIIMMEENNTT TToo pprroovvee tthhaatt • WWaatteerr iiss mmaaddee uupp ooff oonnee mmoolleeccuullee ooff ooxxyyggeenn aanndd ttwwoo mmoolleeccuulleess ooff HHyyddrrooggeenn ii..ee.. HH22OO .. • BByy PPaassssiinngg eelleeccttrriicc ccuurrrreenntt tthhrroouugghh wwaatteerr, ooxxyyggeenn aanndd HHyyddrrooggeenn ccaann bbee sseeppaarraatteedd
  • 4. IInnssttrruummeennttss RReeqquuiirreedd ii)) OOnnee bbaasseelleessss bbrrooaadd mmoouutthheedd ssaalliinnee wwaatteerr bboottttllee iiii)) 22 nnoo ssttaaiinnlleessss sstteeeell rrooddss oorr 22 aalluummiinnuumm wwiirreess.. iiiiii)) CCoorrkk ooff tthhee ssaalliinnee wwaatteerr bboottttllee.. iivv)) SSooddaa –– bbii –– ccrraabb.... vv)) WWaatteerr.. vviiii)) CCooppppeerr wwiirree vviiiiii)) 22 tteesstt ttuubbeess ooff eeqquuaall ssiizzee aanndd sshhaappee.. iixx)) BBaatttteerryy ooff 66 vvoollttss.. xx)) SSttaanndd wwiitthh rriinngg..
  • 5. EEXXPPEERRIIMMEENNTT • TTaakkee aa ssttaanndd wwiitthh rriinngg • PPuutt tthhee SSaalliinnee wwaatteerr bboottttllee iinnvveerrtteedd iinn tthhee ssttaanndd
  • 6. • FFiillll wwaatteerr iinn tthhee bboottttllee.. • PPuutt ssoommee SSooddaa--bbii-- ccaarrbb iinn wwaatteerr..
  • 7. • FFiixx tthhee sstteeeell rrooddss aass sshhoowwnn iinn tthhee ffiigguurree aanndd ccoonnnneecctt tthheemm wwiitthh tthhee ccooppppeerr wwiirree ttoo tthhee BBaatttteerryy ..
  • 8. • WWee oobbsseerrvvee ssoommee ggaass bbuubbbblleess ccoommiinngg oouutt..
  • 9. • TTaakkee ttwwoo tteesstt ttuubbeess • PPuutt tthheemm oonn tthhee rrooddss iinnvveerrtteedd bbyy ttaakkiinngg ccaarree tthhaatt tthheerree iiss nnoo aaiirr iinn tthheemm..
  • 10. • WWhheenn tthhee ccuurrrreenntt iiss ppaasssseedd wwee oobbsseerrvvee tthhaatt ssoommee ggaass iiss ccoolllleecctteedd iinn tthhee tteesstt ttuubbeess.. • WWhheenn mmeeaassuurreedd ,, wwee ffiinndd tthhee lleennggtthh ooff oonnee ggaass lleevveell iiss ddoouubbllee tthhaann tthhee ootthheerr
  • 11. • AAggaaiinn wwee ppaassss tthhee ccuurrrreenntt aanndd lleett tthhee tteesstt ttuubbeess ffuullllyy ffiilllleedd wwiitthh ggaass
  • 12. • TTaakkee oouutt tthhee ttuubbee wwhhiicchh iiss ffiirrsstt ffiilllleedd • WWhheenn aa bbuurrnniinngg mmaattcchh ssttiicckk iiss bbrroouugghhtt nneeaarr,, iitt bbuurrnnss wwiitthh aa ppoopp ssoouunndd
  • 13. • WWHHEENN WWEE BBRRIINNGG TTHHEE MMAATTCCHH SSTTIICCKK NNEEAARR TTHHEE SSEECCOONNDD tteesstt ttuubbee TTHHEE MMAATTCCHHSSTTIICCKK BBUURRNNSS WWIITTHH MMOORREE FFOORRCCEE
  • 14. CCOONNCCLLUUSSIIOONN • WWaatteerr iiss mmaaddee uupp ooff 22 ppaarrttss ooff hhyyddrrooggeenn oonnee ppaarrtt ooxxyyggeenn .. WWAATTEERR HH22++OO==HH22OO