Answer:
1.0 M is the concentration of hydrochloric acid.
Explanation:
[tex]HCl (aq) + NaOH (aq) \rightarrow H_2O (l) + NaCl (aq)[/tex]
To calculate the concentration of acid, we use the equation given by neutralization reaction:
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1,M_1\text{ and }V_1[/tex] are the n-factor, molarity and volume of acid which is [tex]HCl[/tex]
[tex]n_2,M_2\text{ and }V_2[/tex] are the n-factor, molarity and volume of base which is NaOH.
We are given:
[tex]n_1=1\\M_1=?\\V_1=50.0 mL\\n_2=1\\M_2=2.0 M\\V_2=25.0 mL[/tex]
Putting values in above equation, we get:
[tex]1\times M_1\times 50.0 mL=1\times 2.0 M\times 25.0 mL[/tex]
[tex]M_1=\frac{1\times 2.0 M\times 25 mL}{1\times 50.0 mL}=1.0M[/tex]
1.0 M is the concentration of hydrochloric acid.
