Question

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Answer 1

Explanation:

Answer:

The part of total hardness chemically equivalent to total alkalinity is termed as “Carbonates hardness”, which is also referred to as 'temporary' hardness, as the carbonates are removed from water (scale formation) on boiling. Non-carbonate hardness is called 'permanent' hardness as it cannot be removed by boiling.

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Answer 2

1) The reaction mixture show be initially heated slowly in order to control the evolution of HCl gas. 2) The lower end of the thistle funnel in the arrangement should dip below the level of the acid otherwise HCl gas will escape.26-May-2020

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