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 9
A solution has a hydrogen ion concentration of 1 × 10-4 mol/L. What is its pH?
A solution has a pH of 1. Is it a strong acid, weak acid, strong base, or weak base?
A solution has a pH of 3. Is it acidic, basic, or neutral?
A solution has a pH of 5. What is its hydrogen ion concentration? (Give your answer in scientific notation.)
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 measures the pH of rainwater and finds it to be 5.6. Is the rainwater acidic, basic, or neutral?
A student tests a solution with red litmus paper and it remains red. What does this indicate about the solution?
Describe how a pH meter works.
Describe one advantage and one disadvantage of using litmus paper to measure pH.
Explain why strong acids have lower pH values than weak acids.
Explain why the pH scale is considered logarithmic.
If a solution has a pH of 13, what can you say about its hydroxide ion concentration?
If a solution has a pH of 7, what can you say about its hydrogen ion concentration compared to pure water?
If the pH of a solution increases from 5 to 7, how does the hydrogen ion concentration change?
If the pH of a solution is 6, how does its hydrogen ion concentration compare to a solution with pH 8?
The pH of a solution is 11. Is the solution acidic or basic?
What color does phenolphthalein turn in a basic solution?
What does pH stand for?
What is the effect on pH if a small amount of strong acid is added to a neutral solution?
What is the formula used to calculate pH from hydrogen ion concentration?
