1. A solution has a hydrogen ion concentration [H+] of 10^-1 mol/L. What is the pH of this solution?
- A0.5
- B1
- C2
- D2.5
Show answer
Answer: B
pH = -log[H+] = -log(10^-1) = 1.
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pH and pOH Calculations — Chemistry Questions & Practice
Practise 127 pH and pOH Calculations questions from Chemistry for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.
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Practice questions on pH and pOH Calculations — with answers
Try each question first, then open the answer. Explanations are included.
2. A solution has a hydrogen ion concentration [H+] of 10^-3 mol/L. What is the pH of this solution?
- A5
- B4.5
- C2
- D3
Show answer
Answer: D
pH = -log[H+] = -log(10^-3) = 3.
3. A solution has a hydrogen ion concentration [H+] of 10^-4 mol/L. What is the pH of this solution?
- A4
- B2
- C5
- D5.5
Show answer
Answer: A
pH = -log[H+] = -log(10^-4) = 4.
4. A solution has a hydrogen ion concentration [H+] of 10^-5 mol/L. What is the pH of this solution?
- A3
- B7
- C5
- D5.5
Show answer
Answer: C
pH = -log[H+] = -log(10^-5) = 5.
5. A solution has a hydrogen ion concentration [H+] of 10^-6 mol/L. What is the pH of this solution?
- A6
- B7.5
- C4
- D5.5
Show answer
Answer: A
pH = -log[H+] = -log(10^-6) = 6.
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