1. Predict if a reaction will occur when Pb(s) and hydrochloric acid(aq) are com

Question

1. Predict if a reaction will occur when Pb(s) and hydrochloric acid(aq) are combined. If a reaction occurs, write a balanced equation for the reaction.

2. Predict if a reaction will occur when Mg(s) and hydrochloric acid(aq) are combined. If a reaction occurs, write a balanced equation for the reaction.

3. Predict if a reaction will occur when manganese metal and copper(II) nitrate(aq) are combined. If a reaction occurs, write a balanced equation for the reaction.

4. Predict if a reaction will occur when magnesium metal and nickel(II) nitrate(aq) are combined. If a reaction occurs, write a balanced equation for the reaction.

Explanation / Answer

1. Pb lies early in series as compared to H, hence it is easy/possible for Pb to displace H2 from acid. so The reaction will occur.

The reaction is : Pb(s) + 2HCl(aq) ===> PbCl2(s) + H2(g)

2. Mg lies quite early in series as compared to H2, hence it is easy/possible for Mg to displace H2 from acid and water. so The reaction will occur.

The reaction is: Mg(s) + 2HCl(aq) ===> MgCl2(aq) + H2(g)

3. Mg lies quite early in series as compared to Cu, hence it is easy/possible for Mg to displace Cu from acid,salts and water. so The reaction will occur.

The reaction is: Mg(s) + 2Cu(NO3)2(aq) ===> Mg(NO3)2(aq) + 2Cu (s)

4. Mg lies quite early in series as compared to Ni, hence it is easy/possible for Mg to displace Ni from acid,salts and water. so The reaction will occur.

Ni(NO3)2(aq) + Mg(s) --> Ni(s) + Mg(NO3)2 (aq)

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