pH and Its Measurement
Chemistry ⇒ Acids, Bases, and Salts
pH and Its Measurement starts at 9 and continues till grade 12.
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See sample questions for grade 11
A pH meter must be calibrated before use. Explain why.
A solution has a hydrogen ion concentration of 1 × 10-9 mol/L. What is its pH?
A solution has a pH of 3. Is it acidic, basic, or neutral?
A solution has a pOH of 5. What is its pH at 25°C?
A student adds a few drops of phenolphthalein to a solution and observes that it remains colorless. What can be inferred about the pH of the solution?
A student measures the pH of a solution and finds it to be 6.5. Is the solution slightly acidic, neutral, or slightly basic?
Describe how a universal indicator works to measure pH.
Describe the effect of temperature on the pH of pure water.
Explain why strong acids have lower pH values than weak acids of the same concentration.
Explain why the pH of rainwater is usually slightly less than 7.
If a solution has a pH of 2, how many times more acidic is it than a solution with a pH of 4?
If the concentration of H+ ions in a solution is 1 × 10-4 mol/L, what is its pH?
If the pH of a solution increases from 4 to 6, by what factor does the hydrogen ion concentration decrease?
What does the term 'pH' stand for in chemistry?
What is the formula used to calculate pH from hydrogen ion concentration?
What is the pOH of a solution with a pH of 11 at 25°C?
