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Acid, Bases & pH year 8

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
2.
This piece of pH paper has been dipped into:
a)
An acid
b)
A base
c)
A pH-neutral substance
d)
A buffer
3.
An extremely strong base would have a pH of:
a)
1
b)
7
c)
9
d)
14
4.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
5.
Which one of the following is an example of a base?
a)
orange juice
b)
dish soap
c)
vinegar
d)
lemons
6.
A substance that changes color when mixed with an acid or base is a(n) ___.
a)
indicator
b)
neutralizer
c)
corrosive
d)
electricity
7.
Which of the following is NOT a characteristic of an acid?
a)
sour taste
b)
corrosive
c)
it feels slippery
d)
it can burn the skin
8.
A neutralisation reaction is a reaction between 
a)
Acid and a Base 
b)
Acid and water 
c)
Base and water 
d)
None of the above 
9.
An acid reacts with metal to produce 
a)
Carbon dioxide 
b)
Hydrogen gas
c)
Hydrogen gas and water 
d)
Salt and hydrogen gas 
10.
Complete the following reaction:
Hydrochloric acid + magnesium hydroxide --> 
a)
Magnesium chloride + water 
b)
Magnesium + water
c)
Magnesium chloride + hydrogen gas 
d)
Magnesium chloride + water + carbon dioxide 
11.

Which gas gives out a 'pop' sound when a lighted splint is placed in it?

a)

hydrogen

b)

oxygen

c)

carbon dioxide

d)

nitrogen

12.

sulfuric acid + sodium hydroxide --> ?

a)

sodium sulfate + carbon dioxide gas + water

b)

sodium sulfate + water

c)

sodium sulfate + hydrogen gas

13.

nitric acid + magnesium --> ?

a)

magnesium nitrate + carbon dioxide gas + water

b)

magnesium nitrate + water

c)

magnesium nitrate + hydrogen gas

14.

How do you remove the water to leave solid copper sulfate crystals?

a)

Filter

b)

Evaporate

c)

Distill

15.
Salts that are made with hydrochloric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
16.
What salt is produced if you react sodium hydroxide with hydrochloric acid?
a)
sodium hydroxide
b)
sodium sulfate
c)
sodium nitrate
d)
sodium chloride
17.
A salt is formed when nitric acid combines with sodium hydroxide. What is the name of the salt?
a)
Sodium chloride
b)
Sodium nitrate
c)
Hydrogen Nitrate
d)
Nirate
18.
Identify the 'evaporating basin' from the diagrams.
a)
A
b)
B
c)
C
d)
D
19.

How do you separate an excess insoluble reactant from a solution?

a)

Filtration

b)

Precipitation

c)

Crystalisation

d)

Evaporation

20.

When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution?

a)

Filtration

b)

Neutralisation

c)

Condensation

d)

Evaporation/crystallisation

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