Question

Write a balanced equation for the neutralization of each of the follower chemical equations:A. HCl(aq) and Fe(OH)3(s) B. H2CO3(aq) and Mg(OH)2(s)Express as a chemical equation identifying all phases in your answer.

Answer 1

1) Dissociation of HCl(aq) and Fe(OH)3(s)

HCl

`HCl\rightarrow H^++Cl^-`

Fe(OH)3

`Fe(OH)_3\rightarrow Fe^(3+)+3OH^-`

2) Combine the chemical equations above and balance.

`HCl+Fe(OH)_3\rightarrow FeCl_3+H_2O`

List the elements (or polyatomic ions) in the reactants.

H: 4

Cl: 1

Fe: 1

O: 3

List the elements (or polyatomic ions) in the products.

H: 2

Cl: 3

Fe: 1

O: 1

Balance Cl.

`3HCl+Fe(OH)_3\rightarrow FeCl_3+H_2O`

List the elements (or polyatomic ions) in the reactants.

H: 6

Cl: 3

Fe: 1

O: 3

List the elements (or polyatomic ions) in the products.

H: 2

Cl: 3

Fe: 1

O: 1

Balance H.

`3HCl+Fe(OH)_3\rightarrow FeCl_3+3H_2O`

List the elements (or polyatomic ions) in the reactants.

H: 6

Cl: 3

Fe: 1

O: 3

List the elements (or polyatomic ions) in the products.

H: 6

Cl: 3

Fe: 1

O: 3

The balanced chemical equation is

`3HCl_((aq))+Fe(OH)_(3(s))\rightarrow FeCl_(3(aq))+3H_2O_((l))`

3) Dissociation of H2CO3(aq) and Mg(OH)2(s)

H2CO3

`H_2CO_3\rightarrow2H^++CO_3^(2-)`

Mg(OH)2

`Mg(OH)_2\rightarrow Mg^(2+)+2OH^-`

4) Combine the chemical equations above and balance.

`H_2CO_3+Mg(OH)_2\rightarrow MgCO_3+H_2O`

List the elements (or polyatomic ions) in the reactants.

H: 4

C: 1

O: 5

Mg: 1

List the elements (or polyatomic ions) in the products.

H: 2

C: 1

O: 4

Mg: 1

Balance H.

`H_2CO_3+Mg(OH)_2\rightarrow MgCO_3+2H_2O`

List the elements (or polyatomic ions) in the reactants.

H: 4

C: 1

O: 5

Mg: 1

List the elements (or polyatomic ions) in the products.

H: 4

C: 1

O: 5

Mg: 1

The balanced chemical equation is

`H_2CO_3+Mg(OH)_2\rightarrow MgCO_3+2H_2O`