You have 185 mL of an acid with an unknown concentration. To determine the concentration you decide to use a 0.85 M solution of sodium hydroxide to titrate the acid. After the titration you determined that it took 35.7 mL of the 0.85 M solution of sodium hydroxid to reach the endpoint. What is the acids concentration?

Respuesta :

Explanation:

The given data is as follows.

       [tex]M_{1}[/tex] = ?,         [tex]M_{2}[/tex] = 0.85 M

       [tex]V_{1}[/tex] = 185 mL,     [tex]V_{2}[/tex] = 35.7 mL

where, [tex]M_{1}[/tex] is concentration of acid

            [tex]V_{1}[/tex] is the volume of acid

            [tex]M_{2}[/tex] is the concentration of base

            [tex]V_{2}[/tex] is the volume of base

According to the neutralization formula.

          [tex]M_{1} \times V_{1}[/tex] = [tex]M_{2} \times V_{2}[/tex]

Now, substituting the given values into the above formula as follows.

          [tex]M_{1} \times V_{1}[/tex] = [tex]M_{2} \times V_{2}[/tex]

          [tex]M_{1} \times 185 mL[/tex] = [tex]0.85 M \times 35.7 mL[/tex]

                       [tex]M_{1}[/tex] = 0.164 M

Thus, we can conclude that concentration of acid is 0.164 M.