Classify each of these reactions. 2 NaOH ( aq ) + Pb ( ClO 3 ) 2 ( aq ) ⟶ 2 NaClO 3 ( aq ) + Pb ( OH ) 2 ( s ) 2NaOH(aq)+Pb(ClO3)2(aq)⟶2NaClO3(aq) +Pb(OH)2(s) CH 4 ( g ) + 2 O 2 ( g ) ⟶ CO 2 ( g ) + 2 H 2 O ( l ) CH4(g)+2O2(g)⟶CO2(g)+2H2O(l) 2 AgNO 3 ( aq ) + Zn ( s ) ⟶ Zn ( NO 3 ) 2 ( aq ) + 2 Ag ( s ) 2AgNO3(aq)+Zn(s)⟶Zn(NO3)2(aq)+2Ag(s ) HI ( aq ) + LiOH ( aq ) ⟶ H 2 O ( l ) + LiI ( aq ) HI(aq)+LiOH(aq)⟶H2O(l)+LiI(aq) redox redox redox precipitation

Explanation:

Chemical equation:

2NaOH(aq) + Pb(ClO₃)₂(aq)    →  2NaClO₃(aq)  + Pb(OH)₂(s)

The given reaction is example of double displacement reaction. It is also known as double replacement reaction. The cation and anion of both reactants exchange with each others.

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

Chemical equation:

CH₄(g)  + 2O₂(g)    →  CO₂(g) + 2H₂O(l)

The given reaction is example of combustion. In this reaction hydrocarbons burn in the presence of oxygen and produces water and carbon dioxide.

Chemical equation:

2AgNO₃(aq) + Zn(s)    →    Zn(NO₃)₂(aq) + 2Ag(s)

The given reaction is example of single displacement reaction. It is also known as single replacement reaction. Zinc is more reactive than silver it replace the silver from nitrate and form zinc nitrate.

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Chemical equation:

HI(aq) + LiOH(aq)     →     H₂O(l) + LiI(aq)

The given reaction is example of double displacement reaction. It is also known as double replacement reaction. The cation and anion of both reactants exchange with each others.

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD