2/1/23 AP Chem Unit 4 MC Mania

In a redox reaction, the species that is reduced will ___ electrons, becoming more _____ charged.

• lose; negatively

• lose; positively

• gain; positively

• gain; negatively

Which of the following represents the net ionic equation for the precipitation reaction between sodium carbonate and magnesium sulfate?

• Na₂CO₃ + MgSO₄ --> MgCO₃ + Na₂SO₄

• 2Na⁺ + CO₃^-2 + Mg⁺² + SO₄^-2 --> Mg⁺² + CO₃^-2 + 2Na⁺ + SO₄^-2

• 2Na⁺ + SO₄^-2 --> Na₂SO₄

• CO₃^-2 + Mg⁺² --> MgCO₃

A precipitation reaction must...

• Have a solid ionic product from aqueous reactants

• Have only gaseous products from gaseous reactants

• Have only aqueous products from aqueous reactants

An acid is defined as a...

• proton donor

• proton acceptor

In this example, H⁺ + H₂O -> H₃O⁺ the water acts as a(n)

• acid donating a proton

• acid accepting a proton

• base donating a proton

• base accepting a proton

In the following example, CH₃CH₂COOH(aq) + H₂O(l) ⇄ CH₃CH₂COO^-(aq) + H₃O⁺(aq) what would be considered a conjugate acid-base pair?

• CH₃CH₂COOH(aq) and H₂O(l)

• CH₃CH₂COO^-(aq) and H₃O⁺(aq)

• CH₃CH₂COO^-(aq) and CH₃CH₂COOH(aq)

• CH₃CH₂COOH(aq) and H₃O⁺(aq)

Combustion reactions produce what two substances?

• Water Vapor and Carbon Dioxide

• Carbon Dioxide and Oxygen

• Oxygen and Water Vapor

What is the oxidation number of N in NO₂^1-?

• 0

• -1

• 2

• 3

Chose the salts that are soluble:

• sodium

• potassium

• nitrates

• ammonium

The ______ the acid, the ______ its conjugate base.

• stronger, weaker

• stronger, stronger