Neco Model Questions Vol1 2019 Chemistry Question 5
Practice objective / multiple choice question 5 from the 2019 Neco Model Questions Vol1 Chemistry examination.
A 0.250 M solution of benzoic acid (pK_{a}=4.20) is prepared. 25.0 mL of this acid solution is mixed with 25.0 mL of 0.250 M sodium benzoate solution to form a buffer. (a) Calculate the pH of the buffer. (b) Then 10.0 mL of 0.250 M HCl is added to the buffer (volumes are additive). What is the new pH after the addition?
Answer Options
About This Question
This is Neco Model Questions Vol1 2019 Chemistry Question 5. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.