The pH Scale (Leaving Cert Chemistry): Quizzes

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The pH Scale
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12 questions from this quiz

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What pH value represents a neutral solution at 25°C?

7

How much more acidic is a solution with pH 3 compared to one with pH 4?

10 times

Who developed the pH scale in 1909?

Søren Sørensen

What is the mathematical formula for pH?

pH=−log⁡10[H+]\text{pH} = -\log_{10}[\text{H}^+]

What does the 'p' in pH stand for?

Power

If [H+]=1×10−9[\text{H}^+] = 1 \times 10^{-9} mol/L, what is the pH?

9

What is the pH of pure water at 0°C?

7.47

What defines a neutral solution at any temperature?

[H+]=[OH−][\text{H}^+] = [\text{OH}^-]

What is the pH of pure water at 100°C?

6.14

How many times more acidic is lemon juice (pH 2) than coffee (pH 5)?

1000 times

Which measurement method provides accurate, precise, and continuous pH monitoring?

Digital pH meters

If pH = 8.3, what is [H+][\text{H}^+]?

5.0×10−95.0 \times 10^{-9} mol/L

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