Question

explain two methods to remove temporary hardness of water . in easy language. not from other sites .​

Answer 1

Answer:

1) Boiling of hard water .

2) Adding slaked lime .

3) Adding washing soda .

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Answer 2

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Answer:

Here are the two methods →

1. Boiling →

$during \: boiling \: the \: soluble \: Mg(HCO_3)_2 \: \\ converts \: into \: insoluble \: Mg(OH)_2 \: while \\ \: Ca(HCO_3)_2 \: into \: insoluble \: CaCO_3$

$Mg(HCO_3)_2 \:\rightarrow Mg(OH)_2 \: + \: 2CO_2 \\ \\ Ca(HCO_3)_2 \:\rightarrow CaCO_3 \: + \: H_2O \: + \: CO_2$

2. Clark's method →

$calculated \: amount \: of \: lime \: is \: added \\ \: to \: hard \: water \: . \:$

$Ca(HCO_3)_2 \: + \: Ca(OH)_2 \: \rightarrow 2CaCO_3 \: + \: 2H_2O \\ \\ Mg(HCO_3)_2 + 2Ca(OH)_2 \: \rightarrow 2CaCO_3 \: + Mg(OH)_2 + 2H_2O$

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