pH and Its Measurement

Chemistry ⇒ Acids, Bases, and Salts

pH and Its Measurement starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in pH and Its Measurement. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 10

A solution has a hydrogen ion concentration of 1 × 10^-4 mol/L. What is its pH?

A solution has a pH of 11. What is its hydroxide ion concentration? (Give your answer in mol/L)

A solution has a pH of 13. Is it acidic, basic, or neutral?

A solution has a pH of 3. What is its hydrogen ion concentration? (Give your answer in mol/L)

A student adds a few drops of universal indicator to a solution and observes a green color. What is the approximate pH of the solution?

A student finds that a solution turns phenolphthalein pink. What can be inferred about the pH of the solution?

A student tests a solution with red litmus paper and observes no color change. What can be inferred about the solution?

Describe how a pH meter works.

Describe the steps to calibrate a pH meter before use.

Explain why rainwater is slightly acidic.

Explain why strong acids have lower pH values than weak acids at the same concentration.

If a solution has a pH of 1, how would you describe its acidity?

If a solution has a pH of 5, is it more acidic or more basic than a solution with a pH of 8?

If a solution has a pH of 6, how many times more acidic is it than a solution with a pH of 8?

If the pH of a solution decreases from 6 to 4, by what factor does the hydrogen ion concentration increase?

If the pH of a solution is 7.5, is the solution slightly acidic, neutral, or slightly basic?

What color does blue litmus paper turn in an acidic solution?

What does the term 'pH' stand for?

What is the mathematical formula for calculating pH from hydrogen ion concentration?

What is the pH of a neutral solution at 25°C?