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Acid Base Titrations

Total questions: 20

Worksheet time: 19mins

Name
Class
Date
1.
How will I ensure I get an accurate final end point?
a)
Be slow and careful 
b)
Repeat until you have 3 very similar titre
c)
Rinse the Burette
d)
Always use the same Pipette filler
2.
Acid + Base ₋--> 
a)
salt + hydrogen
b)
salt + water
c)
salt + carbon dioxide + water
d)
salt
3.
If phenolphthalein turns bright pink, it indicates
a)
an acid 
b)
a base
c)
a neutral
4.
HCl + NaOH → 
a)
NaH + ClOH
b)
NaCl + H2
c)
NaCl + H2O
d)
NaCl + Cl2
5.
What is the endpoint of a titration
a)
Where the amount of acid and base are balanced according to the equation
b)
Where there is no base
c)
At the end
6.
I am titrating 1M HCl with 1M NaOH.  I have 25mL of HCl. How much NaOH will I need?
a)
2.5mL
b)
5mL
c)
25mL
d)
50mL
7.
what is the reading on this burette?
a)
4.40mL
b)
3.50mL
c)
3.60mL
d)
4.50mL
8.
I have 25mL of 1M HCl which neutralises 20mL of NaOH. What is the concentration of the NaOH?
a)
0.8 M
b)
1 M
c)
1.25 M
9.
What does pH measure?
a)
Amount of Oxygen Ions
b)
Amount of Hydrogen Ions
c)
The amount of salt in a solution
d)
The density
10.

A standard solution is a solution with accurately known concentration.

a)

True

b)

False

11.

What is the main purpose of acid-base titrations?

a)

To test if reactants react.

b)

To calculate the concentration of unknown acid or base.

c)

To test quality of reactants.

12.

What is an equivalence point?

a)

It is the point when enough analyte has been added.

b)

It is the point when the amount of added titrant is equal to the amount of analyte in the solution.

c)

It is the point when the volume of titrant is equivalent the volume of analyte.

d)

It is the point when the concentration of titrant added is equivalent to the volume of analyte.

13.

What is this piece of apparatus called

a)

Pipette

b)

Burette

c)

Janette

d)

Cuvette

14.
What is the endpoint of a titration
a)
Where the amount of acid and base are equal as shown by a colour change 
b)
Where there is no base
c)
When the volume of base in the burette is used up 
d)
When there is no acid
15.

1) 0.9 M NaOH is load into a buret - initial reading is 2.6 mL

2) 100 mL of unknown monoprotic acid is placed under the buret.

3) 2 drops of phenolphthalein is added to the acid.

4) The base is slowly added to the acid until it turns pink. - final reading from the buret is 23.6 mL.

WHAT IS THE MOLARITY OF THE ACID?

a)

0.9 M

b)

0.0189 M

c)

0.189 M

d)

21 M

16.

What is the role of an indicator in a reaction?

a)

To help reactants react successfully.

b)

To bind to the analyte to form a products.

c)

To show when the reaction has reached or past the equivalence point.

d)

To provide a surface for the reaction to occur.

17.

What is an equivalence point?

a)

It is the point when enough analyte has been added.

b)

It is the point when the amount of added titrant is equal to the amount of analyte in the solution.

c)

It is the point when the volume of titrant is equivalent the volume of analyte.

d)

It is the point when the concentration of titrant added is equivalent to the volume of analyte.

18.
Base is titrated with an acid. Which pair have the highest pH at the equivalence point?
a)
NaOH and CH3COOH
b)
NaOH and HNO3
c)
NH3 and HNO3
d)
NH3 and CH3COOH
19.

20ml of 0.1M of acids are used below, which acid require a diff vol to neutralize 0.1M NaOH?

a)

Nitric acid

b)

Sulfuric acid

c)

Hydrochloric acid

20.
Which acid base pair will produce a pH jump from 2.7 to 11.3 at equivalent point?
a)
HCI and NH3
b)
HCI and NaOH
c)
CH3COOH and NH3
d)
CH3COOH and NaOH