Phenolphthalein indicator was added, and the solution in the flask was titrated with 0.215m naoh until the indicator just turned pink(ph=8-9). the exact value of naoh required was 22.75ml. calculate the concentration of hcl in the original 10.00 ml sample. can someone explain how to do it? ?

0489 M is the concentration of HCl in the original 10.00 mL sample.

Explanation:

To calculate the concentration of acid, we use the equation given by neutralization reaction:

where,

are the n-factor, molarity and volume of acid which is

are the n-factor, molarity and volume of base which is NaOH.

We are given:

0489 M is the concentration of HCl in the original 10.00 mL sample.