Question

Solve kr do yrrrr......​

Answer 1

Answer:

second one will be Ca(HCO3)2

Answer 2

The given reactions are completed and balanced below.

(i) $Zn_{(s)}+2NaOH_{(aq)}+2H_{2}O_{(l)}$ → $Na_{2}Zn(OH)_{4}_{(aq)}+ H_{2}_{(g)}$

• By reacting aqueous sodium hydroxide and zinc metal, sodium zincate is obtained along with the evolution of hydrogen gas.

(ii) $CaCO_{3}_{(s)}+H_{2}O_{(l)}+CO_{2}_{(g)}$ → $Ca(HCO_{3})_{2}$

• By reacting calcium carbonate with water and carbon dioxide, we get calcium hydrogen carbonate.

(iii) $HCl_{(aq)}+H_{2}O_{(l)}$ → $H_{3}O^+_{(aq)} + Cl^-_{(aq)}$

• By reacting HCl with water, we get hydronium and chloride ions.