Question

What is the pH at the midway point of the titration of 63.00 mL of a 0.04500 M solution of HCl with 0.1125 M LiOH.

Answer 1

The reaction between HCl and LiOH is

.....(1)

Given:-

  

We are calculate the p^H at at midpoint of titration.

First calculate equivalence point of titration.

From reaction (1) it observed that HCl and LiOH reacts in 1:1 ratio.

Therfore,

Therefore,

equivalence point of titration is 25.2 ml = 0.0252 L

midpoint of titration is

Ie Volume of LiOH added is 0.0126 L.

Now first calculate number of moles of each reactant

Now calculate moles of acid left

Now divide this moles by Total volume of reactant to get Concentration of H⁺ ion.

Hence,

Now,

  

Therefore,

the pH at the midway point of the titration of 63.00 mL of a 0.04500 M solution of HCl with 0.1125 M LiOH is 1.7