R3.1 - Proton Transfer Reactions

R3.1 - Proton Transfer Reactions

9th - 12th Grade

16 Qs

quiz-placeholder

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R3.1 - Proton Transfer Reactions

R3.1 - Proton Transfer Reactions

Assessment

Quiz

Biology

9th - 12th Grade

Easy

Created by

John Mazo

Used 3+ times

FREE Resource

16 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the definition of a Bronsted-Lowry acid?

A substance that accepts a proton

A substance that donates a proton

A substance that donates electrons

A substance that accepts electrons

Answer explanation

A Bronsted-Lowry acid is defined as a substance that donates a proton (H+). This distinguishes it from bases, which accept protons. Therefore, the correct answer is 'A substance that donates a proton'.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the conjugate base of HCl?

Cl⁻

H₂O

OH⁻

H₃O⁺

Answer explanation

The conjugate base of an acid is what remains after the acid donates a proton. HCl donates a proton (H⁺) to become Cl⁻, making Cl⁻ the correct conjugate base.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction between ammonia (NH₃) and water, which species acts as the Bronsted-Lowry base?

NH₃

H₂O

NH₄⁺

OH⁻

Answer explanation

In the reaction between NH₃ and water, NH₃ accepts a proton (H⁺) from water, making it the Bronsted-Lowry base. Water acts as the acid by donating the proton, while NH₄⁺ and OH⁻ are products of the reaction.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following substances is amphoteric?

NaOH

H₂SO₄

HCl

H₂O

Answer explanation

H₂O is amphoteric because it can act as both an acid and a base. It can donate a proton (H⁺) to form OH⁻ or accept a proton to form H₃O⁺, unlike NaOH, H₂SO₄, and HCl, which are strictly bases or acids.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the conjugate acid of NH₃?

NH₄⁺

OH⁻

H₃O⁺

H₂O

Answer explanation

The conjugate acid of a base is formed when the base accepts a proton (H⁺). NH₃ (ammonia) accepts a proton to become NH₄⁺ (ammonium), making NH₄⁺ the correct answer.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a strong acid?

CH₃COOH

H₂CO₃

HCl

H₂O

Answer explanation

HCl (hydrochloric acid) is a strong acid that completely dissociates in water, making it highly effective in increasing hydrogen ion concentration. In contrast, CH₃COOH (acetic acid) and H₂CO₃ (carbonic acid) are weak acids.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a weak base?

NaOH

NH₃

KOH

H₂SO₄

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