Chemistry
Give balanced equations to show how -
(a) Temporary hardness enters into water.
(b) Temporary hardness in water can be removed by boiling.
(c) Permanent hardness in water can be removed by addition of washing soda.
Related Questions
Give a reason why metals are arranged in a series called - 'activity series of metals'. Name a metal which reacts with
(a) Cold water
(b) Boiling water
(c) Steam
to liberate hydrogen in each case.
Differentiate between -
(a) Hard & soft water
(b) Temporary & permanent hard water
with examples.
Select the correct answer from A, B, C, D & E for each statement given below:
A: Colloidal
B: Fused calcium chloride
C: Solvent
D: Suspension
E: Washing soda
The medium of dissolution which allows the solute to dissolve in it.
A solution which can pass through a filter paper but not through a semipermeable membrane
A monohydrate crystal.
A drying agent placed in desiccator.
A heterogenous mixture of undissolved particles in dispersion medium, visible to the naked eye.
Give a balanced equation for the following conversions:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate
Iron to triiron tetroxide using steam.
Sulphur dioxide to sulphurous acid using a neutral liquid.
Potassium oxide to a strong alkali.
Magnesium bicarbonate in temporary hard water to magnesium carbonate by boiling.