Acids and Bases Strengths

Which of the following best approximates the K_a value for this weak acid?

• 1 x 10^–3

• 1 x 10^–4

• 1 x 10^–5

• 1 x 10^–6

Which of the following best represents a solution of H₂SO₄ in water?

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Tags

NGSS.HS-PS1-2

HSO₄¯ + H₂O ↔ H₃O⁺ + SO₄ ^2¯ In the equilibrium represented above, the species that act as bases include which of the following?

• HSO₄^-

• H₂O

• SO₄ ^2¯

• H₂O and SO₄ ^2¯

Given the equation:

H₂SO₄ + H₂O ↔ H₃O⁺ + HSO₄^{- 1}

What is the conjugate acid?

• H₂SO₄

• H₂O

• H₃O⁺

• HSO₄^{- 1}

Which compound is the conjugate base?

HCO₃^- + HCl ==> H₂CO₃ + Cl^-

• Which compound is the conjugate base?

  HCO₃^-

• HCl

• H₂CO₃

• Cl^-

Which of the following is transferred between a conjugate acid-base pair?

• an electron

• a proton

• a neutron

• a OH^- ion

When a hydrogen ion is lost from an acid, the resulting particle is called its conjugate base. Which of the following particles would be the conjugate base for the acid HSO₄^–?

• H₂SO₄

• SO₄^2–

• SO₄^–

• HSO₄

Ethanoic acid is a weak acid because it

• does not contain any hydrogen ions

• has a very low pH

• is used in cooking and flavouring food

• is not fully ionised in water to form many hydrogen ions

What is the conjugate base of HCO₃^-?

• HCO₃^-

• H₂CO₃^-

• CO₃^2-

• H₂CO₃

Which donates protons?

• Brønsted-Lowry Acids

• Brønsted-Lowry Bases

• Arrhenius Acids

• Arrhenius Bases