Question

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?

Answer 1

Step-by-step explanation:

The given data is as follows.

`M_(1)` = ?,
`M_(2)` = 0.85 M

`V_(1)` = 185 mL,
`V_(2)` = 35.7 mL

where,
`M_(1)` is concentration of acid

`V_(1)` is the volume of acid

`M_(2)` is the concentration of base

`V_(2)` is the volume of base

According to the neutralization formula.

`M_(1) * V_(1)` =
`M_(2) * V_(2)`

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

`M_(1) * V_(1)` =
`M_(2) * V_(2)`

`M_(1) * 185 mL` =
`0.85 M * 35.7 mL`

`M_(1)` = 0.164 M

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