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Hydrogen
Hardness of Water
1 question from 1 paper, each with its answer.
- question
- 1
- paper
- 1
- years asked, 2017–2026
- 1 of 10
- of Hydrogen
- 7.14%
Concepts tested
- removal of temporary hardness
All Questions
2019 1 question
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The method used to remove temporary hardness of water is:Clark's method is used to remove temporary hardness of water, in which bicarbonates of calcium and magnesium react with slaked lime $Ca(OH)_2$: $Ca(HCO_3)_2+Ca(OH)_2\rightarrow2CaCO_3\downarrow+2H_2O$ $Mg(HCO_3)_2+2Ca(OH)_2\rightarrow2CaCO_3\downarrow+Mg(OH)_2\downarrow+2H_2O$