A sample of water contains Mg(HCO_3)_2 and Ca | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Temporary hardness in water is caused by the presence of magnesium and calcium hydrogen carbonates. When water containing $Mg(HCO_3)_2$ and $Ca(HC

Vedclass · Accepted Answer

$Mg(OH)_2, CaCO_3$

Vedclass · Answer

(C) Temporary hardness in water is caused by the presence of magnesium and calcium hydrogen carbonates. When water containing $Mg(HCO_3)_2$ and $Ca(HCO_3)_2$ is boiled, these compounds decompose. $Ca(HCO_3)_2$ decomposes to form calcium carbonate $(CaCO_3)$, which is a precipitate: $Ca(HCO_3)_2 \xrightarrow{\Delta} CaCO_3 \downarrow + H_2O + CO_2 \uparrow$. $Mg(HCO_3)_2$ decomposes to form magnesium hydroxide $(Mg(OH)_2)$ because $Mg(OH)_2$ is less soluble than $MgCO_3$: $Mg(HCO_3)_2 \xrightarrow{\Delta} Mg(OH)_2 \downarrow + 2CO_2 \uparrow$.

$A$ sample of water contains $Mg(HCO_3)_2$ and $Ca(HCO_3)_2$. On boiling this water, these hydrogen carbonates are removed as precipitates. The precipitates are

Similar Questions

Which can be used to prepare pure and demineralised $H_2O$ ?

The photolysis of water gives the substance

Hydrogen and oxygen are both gases. What compound is formed by their combination?

The freezing point of heavy water at $1 \ atm$ pressure is: (in $^{\circ}C$)

What causes the temporary and permanent hardness of water?

Vedclass Test Series

Exam Paper Generator

Online Exam Module