pH and pOH scale; Simple calculations - Jamb Chemistry Past Questions and Answers

Question 26:

• JAMB 2018

What is the PH of 0.00 1 moldm\(^3\) solution of the sodium hydroxide

A. 14
B. 13
C. 12
D. 11

Question 27:

• JAMB 2018

Calculate the pH of 0.05 moldm\(^{-3}\) H\(_2\)SO\(_4\)

A. 1.30
B. 1.12
C. 1.00
D. 0.30

Question 28:

• JAMB 2018

The hydrogen ion concentration of a sample of orange juice is 2.0 X 10\(^{-11}\)moldm\(^{-3}\). What is its p\(^{OH}\)? [log102 = 0.3010]

A. 3.30
B. 13.00
C. 10.70
D. 11.30

Question 29:

• JAMB 2019

Na\(_2\)CO\(_3\) + 2HCl \(\to\) 2NaCl + H\(_2\)O + CO\(_2\)
The indicator most suitable for this reaction should have a pH equal to

A. 5
B. 7
C. 3
D. 9