Hard and Soft Water
Hard and Soft Water: Overview
This topic covers concepts, such as, Hard Water, Soft Water, Removing Permanent Hardness of Water by Calgon's Method & Removing Permanent Hardness of Water by Synthetic Resins etc.
Important Questions on Hard and Soft Water
Which of the following groups of ions makes the water hard?
Which one of the following processes will produce hard water?
Hardness of water is The normality of in the water is in the form of Identify
Assertion (A) : Permanent hardness of water is removed by treatment with washing soda.
Reason (R) : Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.
Which of the following is the reagent commonly used to determine the hardness of water by complexometric titration?
What necessary modification should be made in the synthetic resin method, so that the anion exchanger is not required?
Which one of the following processes produces hard water?
What necessary modification should be made in the synthetic resin method, so that the anion exchanger is not required?
Polyphosphates are used as water softening agents because they
Which one of the following processes produces hard water?
Which of the following is the reagent commonly used to determine the hardness of water by complexometric titration?
Permanent hardness of water can be removed by
Treatment with lime can remove hardness of water caused by
When temporary hard water containing magnesium and calcium hydrogen carbonate is boiled, the precipitate formed contains ________
Permanent hardness of water, due to the presence of can be removed by using ____________
(i) Washing soda.
(ii) Calgon's method.
(iii) Boiling.
(iv) Table salt.
Why hard water is not suitable for washing clothes? Explain with equation.
Write a short note on advantage of soft and hard water.
How can the temporary hardness of water removed? Explain with the equation.
