Question

If 14.50 mL of 0.25 M sodium hydroxide reacts completely with 25.0 mL of hydrochloric acid, what is the concentration of the hydrochloric acid?

Answer 1

Answer: The concentration of the hydrochloric acid is 0.145 M.

Step-by-step explanation:
`HCl+NaOH\rightarrow NaOH+H_2O`

According to given balanced equation, 1mole of HCL require 1 mole of NaOH.

Using Molarity equation:

`M_1V_1=M_2V_2`

`M_1` = Molarity of base= 0.25 M

`V_1` = volume of base= 14.50 ml

`M_2` = Molarity of acid = ? M

`V_2` = volume of acid = 25 ml

`0.25* 14.50=M_2* 25`

`M_2=0.145M`