Chemical Reactions
1.
Describe five observations that indicate that a chemical reaction has occurred.
(5)
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2.
Re write the following sentences to make the statements true. (4)
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Boiling water is an example of a chemical change.
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A change when new substances are formed are called physical changes.
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There is only one type of chemical reaction.
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3.
Complete the following word equations. (5)
hydrogen + chlorine
zinc + oxygen
potassium + sulfur
aluminium + oxygen
calcium + bromine
4.
Do chemical word equations tell us everything about a chemical reaction? What
don't they tell us? Explain. (3)
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5.
Complete the following metal displacement word equations. (5)
sodium + aluminium
sulfate
zinc +
tin nitrate
silver +
copper sulfate
magnesium + iron nitrate
calcium + lead sulfate
6. Describe how you could work out where chromium
would fit into the metal reactivity series. (3)
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Total = / 25
