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ELL Level 2 - Conjugate Acids and Bases

Total questions: 24

Worksheet time: 12mins

Name
Class
Date
1.

For a solution, pH + pOH =

a)

7

b)

14

c)

1.0 x 10-14

d)

-log (1.0 x 10 -14)

2.

Which of the following correctly identifies an acid and its conjugate base?

a)

HH4+ , OH-

b)

H2O , OH-

c)

CaCO3 ,CaCl2

d)

HNO3 , H2SO4

3.

pH is the measure of the concentration of ______.

a)

Acids

b)

H+ ion

c)

OH- ion

d)

Bases

4.

A substance that remains when a base has accepted an H+ ion is ..

a)
An acid
b)

A base

c)

A conjugate acid

d)

A conjugate base

5.

What is being donated/accepted between conjugate acid-base pairs?

a)

a hydrogen (H+) ion

b)

a hydroxide (OH-) ion

c)

water

d)

a neutron

6.
If a solution is basic which ion will be more present?
a)

H+

b)

K+

c)

OH-

d)

H-

7.

Acid-base conjugate pairs differ by a single

a)

Electron

b)

Proton

c)

Neutron

d)

Oxygen

8.

Which of the following show an acid and its conjugate base pair (in that order)

a)

H2SO4, SO42-

b)

OH-, H2O

c)

NH4+, H2O

d)

H2CO3, HCO3-

9.

The conjugate acid of HCO3- is ___

a)

H2CO3

b)

CO3-2

c)

HCO3-

d)

H2O

10.

The conjugate base of HCO3- is ___.  

a)

CO3-2

b)

HCO3-

c)

H2O

d)

H2CO3

11.

Given the reaction which compound is the Acid?

a)

NH3

b)

HCl

c)

NH4+

d)

Cl-

12.

Given the reaction which compound is the conjugate base, if HCl is the acid?

a)

NH3

b)

NH4+

c)

Cl-

d)

Hal

13.

What is the conjugate acid of PO4-3 in the following equation?

a)
PO43- 
b)
HNO3 
c)
NO3- 
d)
HPO42-
14.

What is the conjugate base of HCl in the following reaction?

a)
HCO3- 
b)
HCl
c)
 H2CO3 
d)

Cl-

15.

What is the conjugate base in the following reaction?

a)

HCO3-

b)

HCl

c)

H2CO3

d)

Cl-

16.

What is NH4+ in this equation?

a)

Acid

b)

Base

c)

Conjugate Acid

d)

Conjugate Base

17.

Which of the following shows the correct conjugate acid / base pair?

a)

HCI / H3O+

b)

HCI / CI-

c)

HCI / CI

d)

HCI / H3O+

18.

Which compound is the conjugate base?

HCO3- + HCl  → H2CO3 + Cl-

a)

HCO3-

b)

HCl

c)

H2CO3

d)

Cl-

19.

NH3 + H2O → NH4+ + OH-

What is H2O in this reaction?

a)

acid

b)

base

c)

conjugate acid

d)

conjugate base

20.

In the reaction below, H2O is a....

H2SO3 + H2O → H3O+ + HSO3-

a)

base

b)

acid

c)

conjugate acid

d)

conjugate base

21.

In the reaction

HCl + H2O → H3O+ + Cl-

what is the conjugate acid?

a)
HCl
b)
H2O
c)
H3O+
d)
Cl-
22.

Given the equation:

H2SO4 + H2O ↔ H3O+ + HSO4-

What is the conjugate acid?

a)

H2SO4

b)

H2O

c)

H3O+

d)

HSO4- 1

23.

Given the equation:

Ca(OH)2 + H2O ↔ Ca+2 + OH-

Is Ca(OH)2 this acidic or basic?

a)

Acidic

b)

Basic

c)

Neutral

d)

Amphiprotic

24.

Given the equation:

H2O + H2O ↔ H3O+ + OH-

What type of compound is water?

a)

Acidic

b)

Basic

c)

Neutral

d)

Amphiprotic