Acid-Base Reactions
8 past-paper questions on Acid-Base Reactions · examined 2020–2025.
20252 questions
Copper(II) oxide reacts with dilute ethanoic acid. Which equation for this reaction is correct?
Copper(II) oxide reacts with dilute ethanoic acid. Which equation for this reaction is correct?
20243 questions
Oxide Q reacts with separate samples of dilute hydrochloric acid and aqueous potassium hydroxide. Both reactions produce a salt and water. Which statement is correct?
Zinc oxide reacts with both aqueous sodium hydroxide and dilute hydrochloric acid, but sulfur dioxide only reacts with aqueous sodium hydroxide. Explain why.
Zinc oxide reacts with both aqueous sodium hydroxide and dilute hydrochloric acid, but carbon dioxide only reacts with aqueous sodium hydroxide. Explain why.
20231 question
A student does two experiments. Which row correctly shows the colour of both pieces of litmus paper at the end of each experiment?
20211 question
Two solutions are prepared. Solution P is 0.050 mol / dm3 hydrochloric acid. Solution Q is 0.100 mol / dm3 butanoic acid. A 2 cm strip of magnesium ribbon is put into 100 cm3 of each solution. Fizzing is seen in both solutions but the fizzing is faster in solution P than it is in solution Q. Which statement helps to explain this observation?
20201 question
The oxide of element X reacts with acids to form salts. Which statement about element X or its oxide is correct?
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