Chemical equations (AQA GCSE Chemistry Combined Science): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What do word equations use to show a chemical reaction?
What do word equations use to show a chemical reaction?
Names of substances only
In the equation hydrogen + chlorine → hydrogen chloride, what are the reactants?
In the equation hydrogen + chlorine → hydrogen chloride, what are the reactants?
Hydrogen and chlorine
What is the substance on the right side of the arrow called?
What is the substance on the right side of the arrow called?
The product
What do chemical equations use instead of words?
What do chemical equations use instead of words?
Chemical formulas and symbols
Why must you have the same number of atoms on both sides of an equation?
Why must you have the same number of atoms on both sides of an equation?
Atoms cannot be created or destroyed
In , how many hydrogen atoms are on each side?
In , how many hydrogen atoms are on each side?
2 on each side
What does the state symbol (s) represent?
What does the state symbol (s) represent?
Solid
What does the state symbol (aq) mean?
What does the state symbol (aq) mean?
Aqueous (dissolved in water)
What does the state symbol (g) represent?
What does the state symbol (g) represent?
Gas
What does the state symbol (l) mean?
What does the state symbol (l) mean?
Liquid
If bubbling occurs during a reaction, what state symbol explains this?
If bubbling occurs during a reaction, what state symbol explains this?
(g) - gas is being produced
In , how many oxygen molecules react?
In , how many oxygen molecules react?
5 molecules