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25-04-2022 Year 10 Chemistry Quiz 8 - C4 Chemical Calcs Pt 2

Total questions: 30

Worksheet time: 50mins

Name
Class
Date
1.

Concentration is

a)

the amount of solute in the solvent

b)

the amount of solvent in the solute

c)

density

d)

particle size

2.

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt


Solution 2:

500 mL of water

90 g of salt

a)

Solution 1

b)

Solution 2

c)

They have the same concentration

d)

I have no idea

3.

In order to dilute a solution, you need to

a)

add more of the solid

b)

add more water

c)

find the mass

d)

find the volume

4.

Calculate the number of moles in 2dm3 of 0.05 mol dm-3 HCl

a)

0.025

b)

0.05

c)

0.1

d)

0.2

5.

Calculate the concentration in mol dm-3 of 0.400 moles of HCl in 2dm3 of solution.

a)

0.2

b)

0.8

c)

20

d)

80

6.
If phenolphthalein turns bright pink, it indicates
a)
an acid 
b)
a base
c)
a neutral
7.

What is this piece of apparatus called

a)

Pipette

b)

Burette

c)

Janette

d)

Cuvette

8.

What is this piece of apparatus called

a)

Pipette

b)

Burette

c)

Janette

d)

Cuvette

9.

What is the average titre needed for neutralisation?

a)

25.2cm3

b)

59.7cm3

c)

25.0cm3

d)

25.4cm3

10.

Why is indicator added to a titration?

a)

To test for acids

b)

to show the endpoint

c)

to prove a reaction has happened

d)

to show a colour

11.

When should you stop a titration?

a)

When you have added equal volumes

b)

When the indicator changes colour

c)

When you run out of solution

d)

When the solution is no longer acidic

12.

What is the reading on this burette?

a)

24.00cm3

b)

25.80cm3

c)

24.20cm3

d)

23.90cm3

13.

When filling up the pipette, where should you position the pipette?

a)

On the surface of the solution.

b)

Submerge in the solution.

14.

During titration, you should swirl the conical flask constantly.

a)

TRUE

b)

FALSE

15.

All burette readings are recorded to nearest ________.

a)

0.1cm3

b)

0.5cm3

c)

0.01cm3

d)

0.05cm3

16.

What is the white tile or white paper for in titration?

a)

To help clearly see the color change

b)

To protect the conical flask

c)

To add extra height

d)

To assist the reaction

17.

Why do we perform a titration?

a)

To determine the concentration of an unknown solution

b)

To see if a reaction will occur between an acid and base

c)

To find the mass of an unknown acid

d)

To find the molar mass of an unknown solution

e)

To calculate the viscosity of the solution

18.

What are some things we will need for a titration?

a)

A solution of known concnetration

b)

A burette

c)

indicator

d)

mass balance

e)

a bunsen burner

19.

What is placed under the conical flask during a titration

a)

Heat proof mat

b)

White tile

20.
I have 25cm3 of 1M HCl which neutralises 20cm3 of NaOH. What is the concentration of the NaOH?
a)
0.8 M
b)
1 M
c)
1.25 M
21.

Select the Correct equation for calculating concentration in mol/dm^3

a)

concentration = mass of solute / volume of solvent

b)

concentration = moles of solute / volume of solvent

22.

What is the volume occupied by 1 mole of any gas at RTP?

a)

44.8 dm3

b)

22.4 dm3

c)

16.8 dm3

d)

24 dm3

23.
What is the number of moles in 24dm3 of a gas?
a)
10
b)
0.1
c)
1
d)
24
24.

Select the Correct equation for calculating concentration in g/dm^3

a)

concentration = mass of solute / volume of solvent

b)

concentration = moles of solute / volume of solvent

25.
How many moles are there in 500ml of a 0.2Moles/dm3 solution?
a)
0.2
b)
0.001
c)
10
d)
0.1
26.
What volume would 0.1 moles of oxygen occupy?
a)
24
b)
32
c)
1
d)
2.4
27.

What is the volume of 5 moles of oxygen gas at RTP?

a)

112 dm3

b)

22.4 dm3

c)

120 dm3

d)

24 dm3

28.

What is the volume of 3 moles of hydrogen gas at RTP?

a)

22.4 dm3

b)

24 dm3

c)

72 dm3

d)

89.6 dm3

29.

How many moles of methane gas molecules, CH4, are in 12 dm3 of methane at room temperature and pressure?

a)

11.2 moles

b)

0.5 moles

c)

179.2 moles

d)

27.2 moles

30.

Which volume will be occupied by a gas containing 6.02 x 1023 atoms at RTP?

a)

1.0 dm3

b)

24 dm3

c)

22.4 dm3

d)

44.8 dm3

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