Grade 10 · Science · Chemistry

10th grade Strong and weak acids and bases worksheet

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Strong and weak acids and bases

Grade 10 Science Worksheet - Challenge Me

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Circle the best answer, or write your answer on the line.

HCl and acetic acid are both 0.1 M. HCl ionizes completely, so its [H⁺] is 0.1 M; acetic acid's is 0.0013 M. About how many times more H⁺ does HCl have, Ari?
HCl and acetic acid are both 0.01 M. HCl ionizes completely, so its [H⁺] is 0.01 M; acetic acid's is 0.00042 M. About how many times more H⁺ does HCl have, Bo?
HCl and acetic acid are both 0.001 M. HCl ionizes completely, so its [H⁺] is 0.001 M; acetic acid's is 0.00013 M. About how many times more H⁺ does HCl have, Esme?
4.
Acetic acid is 0.4% ionized at 1.0 M and 4.2% at 0.010 M. What does this show, Jun?
- Its Ka changes with concentration
- More ionizes when it is dilute
- It turns strong when dilute
5.
Which has the lower pH: 0.10 M HCl or 0.10 M acetic acid, Kira?
- Both have the same pH
- The 0.10 M HCl
- The 0.10 M acetic acid
6.
Why is [H⁺] in 0.10 M HCl equal to 0.10 M, Luz?
- HCl is a concentrated acid
- Every HCl molecule splits
- Water adds that much H⁺
7.
Milo says acetic acid is weak because vinegar is mostly water. Agree or disagree?
- Disagree: weak means partly split
- Agree: weak just means watered down
- Agree: water makes any acid weak
8.
Pia says a strong acid has a lower pH than a weak acid, whatever their concentrations. Agree or disagree?
- Agree: weak acids have pH above 7
- Disagree: concentration matters too
- Agree: strong acids win at any amount
9.
Milk of magnesia, Mg(OH)₂, is about pH 10.5, far milder than 1.0 M NaOH at 14.0. Why, Tala?
- It has no OH⁻ in it
- Little Mg(OH)₂ dissolves
- Mg(OH)₂ is an acid
10.
Which pH fits 0.10 M acetic acid, Zee?
- About 2.9
- About 1.0
- About 7.0

10th grade Strong and weak acids and bases worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Strong and weak acids and bases. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can say that strong acids and bases split completely and weak ones only partly, and name common examples.
I can tell strength (how much splits) from concentration (how much is dissolved).
I can find percent ionization and compare H⁺ in strong and weak acids of the same concentration.
I can use Ka and Kb: a larger value means a stronger acid or base.

Standard: none (TX)

Words to know

strong acid: An acid that ionizes completely in water, such as HCl or HNO₃

weak acid: An acid that ionizes only partly, such as acetic acid

concentration: How much solute is dissolved per liter (M)

percent ionization: 100 × [H⁺] ÷ starting concentration

Ka: The acid ionization constant; larger means stronger

Common mistakes

Your child gave the percent of molecules that stayed whole. The question asks for the percent that split into ions.

Your child gave a fraction, not a percent. Multiply [H⁺] ÷ concentration by 100.

Your child assumed equal concentrations give equal H⁺. A strong acid ionizes completely; a weak one only partly.

Questions parents ask

What is the most common mistake with strong and weak acids and bases?

Your child gave the percent of molecules that stayed whole. The question asks for the percent that split into ions.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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