Exam practice
Exam questions
Write your answer. Then open the mark scheme and tick each point you made.
- Question 1 of 91 mark
State the pH of a neutral solution.
Mark scheme
- 7
- Question 2 of 91 mark
A solution has a pH of 3. What does this tell you about the solution?
Mark scheme
- It is an acid (accept: acidic, a weak acid)
- Question 3 of 92 marks
Describe the colour of litmus in an acid and in an alkali.
Mark scheme
- Red in an acid
- Blue in an alkali
- Question 4 of 92 marks
Name the two products made when an acid reacts with an alkali.
Mark scheme
- A salt
- Water
- Question 5 of 91 mark
Name the salt made when hydrochloric acid reacts with sodium hydroxide.
Mark scheme
- Sodium chloride
- Question 6 of 94 marks
Describe how to make crystals of a salt from an acid and an alkali.
Mark scheme
- Add alkali to the acid until it is neutral
- Pour the solution into an evaporating basin
- Heat it to evaporate some of the water
- Leave it to cool so that crystals form
- Question 7 of 92 marks
Magnesium reacts with hydrochloric acid. Write the word equation for this reaction.
Mark scheme
- magnesium + hydrochloric acid on the left
- magnesium chloride + hydrogen on the right
- Question 8 of 92 marks
Describe the test for hydrogen gas and its result.
Mark scheme
- Hold a lit splint in the gas
- It burns with a squeaky pop
- Question 9 of 92 marks
Explain how an indigestion tablet relieves indigestion.
Mark scheme
- It contains a base (accept: an alkali)
- It neutralises the extra stomach acid