Question

What is the concentration of ammonia in a solution if 23.4 mL of a 0.117 M solution of HCl are needed to titrate a 100.0 mL sample of the solution?

Answer 1

Answer: 0.0274 M

Explanation:-

The balanced chemical solution is:

`NH_4OH(aq)+HCl(aq)\rightarrow NH_4Cl(aq)+H_2O(l)`

According to the neutralization law,

`n_1M_1V_1=n_2M_2V_2`

where,

`M_1` = molarity of
`HCl` solution = 0.117 M

`V_1` = volume of
`HCl` solution = 23.4 ml

`M_2` = molarity of
`NH_4OH` solution = ?

`V_2` = volume of
`NH_4OH` solution = 100.0 ml

`n_1` = valency of
`HCl` = 1

`n_2` = valency of
`NH_4OH` = 1

`1* 0.117M* 23.4=1* M_2* 100.0`

`M_2=0.0274`

Therefore, the concentration of ammonia in a solution will be 0.0274 M