What makes an acid or a base
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
Acetic acid, CH₃COOH, has 4 hydrogen atoms and gives up one H⁺. How many hydrogen atoms does its conjugate base have, Ari?
Citric acid, C₆H₈O₇, has 8 hydrogen atoms and gives up one H⁺. How many hydrogen atoms does its first conjugate base have, Bo?
In the Brønsted–Lowry model, what is an acid, Jun?
- A proton acceptor
- An OH⁻ donor
- A proton donor
In HCl + H₂O → H₃O⁺ + Cl⁻, which reactant accepts the proton, Kira?
- Neither reactant
- H₂O
- HCl
In NH₃ + H₂O → NH₄⁺ + OH⁻, what does water do, Luz?
- Accepts a proton from NH₃
- Hands NH₃ a whole OH⁻ ion
- Donates a proton to NH₃
What is the conjugate base of acetic acid, CH₃COOH, Milo?
- CH₃COO⁻
- OH⁻
- CH₃COOH₂⁺
In HCl + H₂O → H₃O⁺ + Cl⁻, which two form a conjugate acid-base pair, Pia?
- Cl⁻ and H₃O⁺
- HCl and H₂O
- HCl and Cl⁻
Milk of magnesia is mostly Mg(OH)₂. Why does it count as an Arrhenius base, Ren?
- It has no hydrogen atoms in it
- It gives OH⁻ ions in water
- Its Mg²⁺ ions donate protons
Ammonia, NH₃, has no OH⁻ in its formula. Why is it still a base, Tala?
- It accepts a proton from water
- It donates a proton to water
- It gives off H⁺ in water
Which substance can act as an acid in one reaction and a base in another, Zee?
- Water
- Hydrochloric acid
- Sodium hydroxide