Question

The molar concentration of h+ ion when 0.1m of 200ml hcl is mixed with 0.05m of 300ml h2so4 solution is

Answer 1

Answer:

The molar concentration  of the $H^+$ ions is 0.1 m.

Explanation:

In 0.1 M 200 mL solution of HCl.

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

Moles of HCl in 0.1 M solution

$0.1 M=\frac{\text{Moles of HCl}}{0.2 L}$

Moles of HCl= 0.02 mol

1 mol of HCl gives 1 mol of $H^+$ ion, the 0.02 mol of HCl will give 0.02 mol of $H^+$ ions.

In 0.05 M 300 mL solution of $H_2SO_4$.

$H_2SO_4\rightarrow 2H^++SO_{4}^-$

Moles of $H_2SO_4$l in 0.05 M solution

$0.05 M=\frac{\text{Moles of HCl}}{0.3 L}$

Moles of $H_2SO_4$= 0.015 mol

1 mol of $H_2SO_4$ gives 2 mol of $H^+$ ion, the 0.015 mol of $H_2SO_4$ will give 0.03 mol of $H^+$ ions.

After mixing both solutions the concentration of the $H^+$ ions in the solution is:

$M=\frac{0.02 mol+0.03 mol}{0.5 L}=0.1 M$

The molar concentration  of the $H^+$ ions is 0.1 m.