1. Chemical Reactions and EquationsDifficult

Write the balanced chemical equations for the following reactions.

$(a)$ Calcium hydroxide $+$ Carbon dioxide $\rightarrow$ Calcium carbonate $+$ Water

$(b)$ Zinc $+$ Silver nitrate $\rightarrow$ zinc nitrate $+$ Silver

$(c)$ Aluminium $+$ Copper chloride $\rightarrow$ Aluminium chloride $+$ Copper

$(d)$ Barium chloride$+$ Potassium sulphate $\rightarrow$ Barium sulphate $+$ Potassium chloride

Solution

$(a)$ $Ca ( OH )_{2}+ CO _{2} \longrightarrow CaCO _{3}+ H _{2} O$

$(b)$ $Zn +2 AgNO _{3} \longrightarrow Zn \left( NO _{3}\right)_{2}+2 Ag$

$(c)$ $2 Al +3 CuCl _{2} \longrightarrow 2 AlCl _{3}+3 Cu$

$(d)$ $BaCl _{2}+ K _{2} SO _{4} \longrightarrow BaSO _{4}+2 KCl$

Identify the substances that are oxidised and the substances that are reduced in the following reactions.

$(i)$ $4 Na ( s )+ O _{2}( g ) \rightarrow 2 Na _{2} O ( s )$

$(ii)$ $CuO ( s )+ H _{2}( g ) \rightarrow Cu ( s )+ H _{2} O ( l )$

Medium

Difficult

Medium

Medium

Medium