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Topic Content:
- Removal of Temporary Hardness
- Effects of Temporary Hardness
This is caused by the presence of dissolved calcium hydrogen trioxocarbonate(VI) [Ca(HCO3 )2 ].
Removal of Temporary Hardness:
1. Boiling: The Ca(HCO3 )2 decomposes on heating forming insoluble calcium trioxocarbonate(VI)
\(\scriptsize Ca(HCO_3)_{2(aq)} \overset{boil}{\large \rightarrow} CaCO_{3(s)} + H_2O_{(l)} + CO_{2(g)}\)
This brings the calcium ion out of the solution as a precipitate. The removal of calcium ions will make the soap added to the water form a lather.
Temporary hardness of water can be removed by boiling, hence the term temporary.
2. Addition of slaked lime: Temporary hardness of water can
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