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Water — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYWater2 Marks
Question
Give equations to show what happens when temporary hard water is
Boiled
✓

Answer

$\begin{gathered}\mathrm{Ca}\left(\mathrm{HCO}_3\right)_2 \xrightarrow{\text { Boil }} \mathrm{CaCO}_3+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 \uparrow \\ \mathrm{Mg}\left(\mathrm{HCO}_3\right)_2 \xrightarrow{\text { Boil }} \mathrm{MgCO}_3+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 \uparrow\end{gathered}$

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