Titration of Sr(OH)2 by HCl. What is the pH?

[disneychannel]

1. COnsider the titration of 80.0 mL of 0.100 M Sr(OH)₂ by 0.400 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added.

a. 0.0 mL
b. 20 mL
c.80 mL

Homework Equations

Henderson–Hasselbalch equation or direct -log

The Attempt at a Solution

a) before I added any HCl, I just did the -log(.1)=1 14-1=13 is that correct?
B)i know it is a strong acid & strong base. & i cannot use pKa for Henderson–Hasselbalch equation. what else can i do?
Sr(OH)₂ + 2HCl -> 2H₂O + Sr
0.092 ... 0.0016 ... 0
-0.008 ... -0.0016 ... +0.008
0.0912 ... 0 ... . 0.008

 

[Borek]

A lot of information about titration and titration curves can be found on www.titrations.info, especially check acid base titration curve calculation section.

However, correct approach to your problem is almost directly explained here: calculating pH of mixture of strong acid and strong base.

 

[disneychannel]

in this do i also have to multiply the HCL molarity by two or only the Sr(OH)2
for letter b i got a pH of 0 and when i did it with 30 mL i got a higher pH...is that normal?