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 - Building Confidence

NameDate

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

Each citric acid molecule in lemon juice can give up 3 H⁺ ions. How many H⁺ ions can 4 molecules give up, Bo?
2.
Using the strip, which liquid is a base, Jun?
- Milk of magnesia
- Vinegar
- Lemon juice
3.
Using the strip, which liquid has more H⁺ than OH⁻, Kira?
Use the picture in question 2.
- Pure water
- Vinegar
- Baking soda solution
4.
Using the strip, why is pure water neutral, Luz?
Use the picture in question 2.
- It has more OH⁻ than H⁺ ions
- It contains no ions
- Its H⁺ and OH⁻ are equal
5.
What does an Arrhenius acid do in water, Milo?
- Turns the water solid
- Makes H⁺ ions
- Makes OH⁻ ions
6.
What does an Arrhenius base do in water, Noah?
- Makes the water salty
- Makes H⁺ ions
- Makes OH⁻ ions
7.
NaOH dissolves to give Na⁺ and OH⁻ ions. What is NaOH, Pia?
- Neither one
- An Arrhenius base
- An Arrhenius acid
8.
Lemon juice has a pH of about 2.2. Is it acidic or basic, Ren?
- Acidic: its pH is below 7
- Neutral: it is a juice
- Basic: its pH is below 7
9.
Baking soda solution has a pH of about 8.3. Is it acidic or basic, Tala?
- Acidic: its pH is above 7
- Basic: its pH is above 7
- Neutral: it is a powder
10.
A soap solution turns red litmus paper blue. Is the solution acidic or basic, Zee?
- Basic
- Acidic
- Neutral

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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