Grade 10 · Science · Chemistry

10th grade What makes an acid or a base worksheet

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What makes an acid or a base

Grade 10 Science Worksheet - Challenge Me

NameDate

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

Water, H₂O, has charge 0 and gives up one H⁺. What is the charge of its conjugate base, Ari?
The hydrogen sulfate ion has charge -1 and gives up one H⁺. What is the charge of its conjugate base, Bo?
The ammonium ion has charge +1 and gives up one H⁺. What is the charge of its conjugate base, Esme?
4.
In HCO₃⁻ + H₂O → CO₃²⁻ + H₃O⁺, what role does HCO₃⁻ play, Jun?
- Neither: it is a spectator
- Acid: it donates a proton
- Base: it accepts a proton
5.
In HCO₃⁻ + H₃O⁺ → H₂CO₃ + H₂O, what role does HCO₃⁻ play, Kira?
- Base: it accepts a proton
- Acid: it donates a proton
- Neither: it stays unchanged
6.
What is a particle like HCO₃⁻ or H₂O, which can donate or accept a proton, called, Luz?
- Amphiprotic
- Neutral
- Insoluble
7.
Milo says ammonia can't be a base because its formula has no OH⁻. Agree or disagree?
- Disagree: it accepts a proton
- Agree: a base must contain OH⁻
- Agree: ammonia is an acid
8.
Noah says the carbonate ion, CO₃²⁻, can't be a base because it has no OH⁻. Agree or disagree?
- Disagree: it accepts protons
- Agree: without OH⁻ there is no base
- Agree: carbonate gives off H⁺ ions
9.
Which is a conjugate acid-base pair, Ren?
- H₂O and OH⁻
- HCl and NaOH
- H₂O and H₂O₂
10.
What is the conjugate acid of water, Tala?
- H₂O₂
- OH⁻
- H₃O⁺

What makes an acid or a base. Every version has 10 questions, and the answer key prints on the second page.

I can use Arrhenius's definitions: acids make H⁺ in water, bases make OH⁻.
I can use the Brønsted–Lowry definitions: acids donate protons, bases accept them.
I can write conjugate acids and bases, which differ by one H⁺, and find conjugate pairs in an equation.
I can sort household liquids as acidic, neutral or basic from their pH.

Standard: none (TX, FL)

acid (Arrhenius): A substance that makes H⁺ ions in water

base (Arrhenius): A substance that makes OH⁻ ions in water

acid (Brønsted–Lowry): A proton (H⁺) donor

base (Brønsted–Lowry): A proton acceptor

conjugate pair: An acid and base that differ by one H⁺

amphiprotic: Able to donate or accept a proton, like water

Your child added the units and the ions each one gives. Each unit gives the same number, so multiply.

Your child added a proton (H⁺) instead of removing it. A conjugate base is the acid with one H⁺ taken away.

Your child thought a base must contain OH⁻. In the Brønsted–Lowry model, a base is anything that accepts a proton.

What is the most common mistake with what makes an acid or a base?

Your child added the units and the ions each one gives. Each unit gives the same number, so multiply.

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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