A2 Buffers

A2 Buffers

11th Grade

8 Qs

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A2 Buffers

A2 Buffers

Assessment

Quiz

Chemistry

11th Grade

Practice Problem

Medium

Created by

Elisha Slattery

Used 4+ times

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An acidic buffer is a:

Solution with strong acid and weak acid

Solution with weak acid and strong base

Solution with weak acid and conjugate base

Solution with strong acid and conjugate base

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A buffer solution...

Stops the pH changing

Prevents a solution from becoming basic

Prevents a solution from becoming acidic

Minimises pH changes when small amounts of acid or base are added

3.

MULTIPLE SELECT QUESTION

1 min • 1 pt

What are two possible ways of making an acidic buffer:

Mix a solution of a weak acid with a solution of it's conjugate salt

Mix a solution of a strong acid with a solution of it's conjugate salt

Mix a solution of excess weak acid with a solution of a strong base

Mix a solution of excess weak acid with a solution of a weak base

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What happens to a buffer to minimise pH changes when an alkali is added?

The H+ ions react with the OH- ions to form water, shifting equilibrium to the right of the buffer equation

The H+ ions react with the OH- ions to form water, shifting equilibrium to the left of the buffer equation

The conjugate base reacts with the OH- ions, shifting equilibrium to the right of the buffer equation

The conjugate base reacts with the OH- ions, shifting equilibrium to the left of the buffer equation

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the optimum pH in human blood?

7.40

6.40

8.40

7

6.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Which of these could be added to a solution of ammonia in order to form a buffer solution?

Ethanoic acid

Sodium Hydroxide

Hydrochloric Acid

Ammonium Chloride

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The diagram shows a pH curve produced by adding a strong alkali to a weak acid. Which point on the curve represents a solution that can act as a buffer?

A

B

C

D

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