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

NameDate

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

Acetic acid at 0.5 M has [H⁺] = 0.003 M. What percent of its molecules have ionized, Bo?
2.
Which phrase describes a dilute acid rather than a weak one, Jun?
- Few molecules split into ions
- A pH that is above 7
- Little acid per liter of water
3.
Can a solution of a strong acid be dilute, Kira?
- Yes: strength and amount differ
- No: dilute means weak
- No: a strong acid can't be dilute
4.
Which has more H⁺: 0.10 M HCl or 0.10 M acetic acid, Luz?
- The acetic acid
- The HCl
- They are equal
5.
Ammonia, NH₃, is a weak base. What does that mean, Milo?
- Each NH₃ takes a proton
- Few NH₃ molecules take a proton
- It has no hydrogen atoms
6.
What does sodium hydroxide, NaOH, give in water, Noah?
- Na⁺ and OH⁻, completely
- Mostly whole NaOH units
- H⁺ and NaO⁻ ions
7.
Ammonia has Kb = 1.8 × 10⁻⁵. Is it a strong or weak base, Pia?
- Strong: it smells sharp
- Strong: its Kb is small
- Weak: its Kb is small
8.
What does a larger Ka tell you about an acid, Ren?
- It is a weaker acid
- It is a stronger acid
- It is a more dilute acid
9.
Acid A has Ka = 1.8 × 10⁻⁵ and acid B has Ka = 1.8 × 10⁻³. Which is stronger, Tala?
- They are equal
- Acid B
- Acid A
10.
Acetic acid has Ka = 1.8 × 10⁻⁵. What does the small Ka show, Zee?
- It has no hydrogen to give
- The vinegar is very dilute
- Most molecules stay whole

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

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)

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

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.

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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