W10_titrations_salts_key

# W10_titrations_salts_key - Chem 125 Winter 2008 Dr Retsek...

• Notes
• 2

This preview shows pages 1–2. Sign up to view the full content.

Chem 125 Dr. Retsek Winter 2008 Worksheet 10: Titrations and Salts (KEY) 1. A 25.00-mL sample of 0.100 M HCl is titrated with with 0.100 M NaOH. a. What is the pH before the addition of any NaOH? pH = 1.00 b. How much NaOH is required to reach the equivalence point? 25.00 mL c. What is the pH at the equivalence point? 7.00 2. A 25.00-mL sample of 0.100 M HC 2 H 3 O 2 is titrated with 0.100 M NaOH. a. What volume of base is needed to reach the equivalence point? 25.00 mL b. At what volume, does the pH = pK a 12.5 mL c. Given K a for HC 2 H 3 O 2 is 1.8 x 10 -5 , calculate the pH before the addition of any NaOH 2.89 d. Estimate the pH at the equivalence point. pH > 7 3. For the titration of 25.00 mL of 0.150 M HCl with 0.250 M NaOH: a. Calculate the initial pH. 0.824 b. Is the solution neutral, acidic, or basic at the equivalence point? neutral c. How much NaOH is required to reach the equivalence point? 15.00 mL d. Estimate the pH of the solution after the addition of 25.00 mL of NaOH. 11-12 4. For the titration of 20.00 mL of 0.150 M HF with 0.250 M NaOH.

This preview has intentionally blurred sections. Sign up to view the full version.

This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern