Question

type the correct coefficient for each reactant and product.

1. balance the chemical equation for the reaction of aqueous sodium hydroxide and aqueous iron(iii) chloride.

\\( \square \mathrm { naoh } ( a q ) + \square \mathrm { fecl } _ { 3 } ( a q ) \
ightarrow \square \mathrm { fe } ( \mathrm { oh } ) _ { 3 } ( s ) + \square \mathrm { nacl } ( a q ) \\)

1. balance the chemical equation for the reaction of aqueous sodium chloride and aqueous silver nitrate.

\\( \square \mathrm { nacl } ( a q ) + \square \mathrm { agno } _ { 3 } ( a q ) \
ightarrow \square \mathrm { agcl } ( s ) + \square \mathrm { nano } _ { 3 } ( a q ) \\)

1. balance the chemical equation for the reaction of aqueous sodium carbonate and aqueous nickel(ii) nitrate.

\\( \square \mathrm { na } _ { 2 } \mathrm { co } _ { 3 } ( a q ) + \square \mathrm { ni } ( \mathrm { no } _ { 3 } ) _ { 2 } ( a q ) \
ightarrow \square \mathrm { nano } _ { 3 } ( a q ) + \square \mathrm { nico } _ { 3 } ( s ) \\)

Explanation:

1)

Step1: Balance Cl atoms

In \(FeCl_3\) and \(NaCl\), since there are 3 Cl atoms in \(FeCl_3\), we put a 3 in front of \(NaCl\).
\(NaOH(aq)+FeCl_3(aq)\to Fe(OH)_3(s)+3NaCl(aq)\)

Step2: Balance Na and OH⁻ atoms

Now, for Na and OH⁻, we put a 3 in front of \(NaOH\).
\(3NaOH(aq)+FeCl_3(aq)\to Fe(OH)_3(s)+3NaCl(aq)\)

2)

Step1: Check atom counts

Looking at \(NaCl\), \(AgNO_3\), \(AgCl\), \(NaNO_3\). The number of each type of atom (Na, Cl, Ag, N, O) is the same on both sides when we put 1 for each coefficient.
\(1NaCl(aq)+1AgNO_3(aq)\to1AgCl(s)+1NaNO_3(aq)\)

3)

Step1: Balance Na atoms

In \(Na_2CO_3\) and \(NaNO_3\), since there are 2 Na atoms in \(Na_2CO_3\), we put a 2 in front of \(NaNO_3\).
\(Na_2CO_3(aq)+Ni(NO_3)_2(aq)\to2NaNO_3(aq)+NiCO_3(s)\)

Answer:

1. \(3\ NaOH(aq)+1\ FeCl_3(aq)\to1\ Fe(OH)_3(s)+3\ NaCl(aq)\)
2. \(1\ NaCl(aq)+1\ AgNO_3(aq)\to1\ AgCl(s)+1\ NaNO_3(aq)\)
3. \(1\ Na_2CO_3(aq)+1\ Ni(NO_3)_2(aq)\to2\ NaNO_3(aq)+1\ NiCO_3(s)\)