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16 Cards in this Set

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What is the chemical formula of water?
H20
What is the process of splitting water using electricity?
Electrolysis
The liquid in which a substance is dissolved.
Solvent.
The solid which is dissolved.
Solute
A solution in which no more solid can be dissolved
Saturated
What is suspension?
When an insoluble substance is mixed with water,the mixture formed is a suspension.
Which is an universal solvent and why?
water is an universal solvent

because no other solvent can dissolve as many solvent as water can
What are the 3 conditions which help in making solutions?
1.higher temperature of the solvent

2.the solute should be fine grained

3.the solution should be stirred well.
What is an emulsion?
When 2 liquids are immiscible eg.oil and water, the oil and water mixture if shaken vigorously forms an emulsion

eg. milk is an emulsion containing various soluble substances and tiny droplets of fat floating in water
Name solvents for grease.
Petrol

Kerosene

Dry cleaning fluid
Sodium + water --> Sodium hydroxide + hydrogen
2Na + 2H2O --> 2NaOH + H2
potassium + water --> Potassium hydroxide + hydrogen
2K + 2H2O --> 2KOH + H2
Calcium + water --> Calcium hydroxide + hydrogen
Ca + 2H2O --> Ca(OH)2 + H2
Hard Water
Water in which soap does not lather easily.
Name some salts which make water hard.
Magnesium Sulphate - MgSO4

Calcium Sulphate - CaSO4

Magnesium Bicarbonate-
Mg(HCO3)2

Calcium Bicarbonate-
Ca(HCO3)2
One way of removing hardness of water.
By Boiling