Water and Solution Form 2: Key Terms and Concepts
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Water and Solution Form 2: Key Terms and Concepts
- 1. WATER AND SOLUTION FORM 2
- 5. The freezing point of water is 0° Celsius or 32° Fahrenheit.
- 6. Water boils at 100 degrees Celsius or 212 degrees Fahrenheit under standard conditions at sea level (at one atmosphere of pressure). The boiling point of water and any other substance depends on the atmospheric pressure, which changes with elevation. At higher altitudes, the pressure is lower, and so water boils at a lower temperature. If the barometric pressure is not at the standard value, the boiling point will be different.
- 8. Electrolysis of water is the decomposition of water (H 2 O) into oxygen (O 2 ) and hydrogen gas (H 2 ) due to an electric current being passed through the water.
- 10. solution is a homogeneous mixture composed of two or more substances solute is dissolved in another substance, known as a solvent . solvent is a liquid or gas that dissolves a solid, liquid, or gaseous solute , resulting in a solution .
- 13. ACIDS Taste: Sour. Touch: Like water. Tested with litmus paper: Turn blue litmus red. pH value: From 0 to less than 7. Reaction with metals: Form hydrogen and a salt. Reaction with carbonates: Form a salt, water and carbon dioxide. Reaction with ammonium compounds: No reaction. ALKALIS Taste: Bitter. Touch: Soapy. Tested with litmus paper: Turn red litmus blue. pH value: From above 7 to 14. Reaction with metals: No reaction. Reaction with carbonates: No reaction. Reaction with ammonium compounds: Give off ammonia gas NEUTRAL