In an experiment, powdered calcium hydroxide was added to dilute hydrochloric acid and the pH was measured - Edexcel - GCSE Chemistry - Question 8 - 2023 - Paper 1
Question 8
In an experiment, powdered calcium hydroxide was added to dilute hydrochloric acid and the pH was measured.
The method used was
step 1 measure 200 cm³ dilute hydro... show full transcript
Worked Solution & Example Answer:In an experiment, powdered calcium hydroxide was added to dilute hydrochloric acid and the pH was measured - Edexcel - GCSE Chemistry - Question 8 - 2023 - Paper 1
Step 1
a) State what should be done after step 2 to make sure that any reaction is complete.
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Answer
After step 2, the mixture should be stirred or swirled to ensure that the powdered calcium hydroxide completely reacts with the dilute hydrochloric acid. This can be done using a stirring rod or by gently shaking the beaker. It's essential to mix the solution thoroughly so that the reaction completes.
Step 2
b) Complete the word equation for the reaction.
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Answer
calcium hydroxide + hydrochloric acid → calcium chloride + water
Step 3
c) Which row of the table shows the state symbols for powdered calcium hydroxide and dilute hydrochloric acid in the balanced chemical equation?
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Answer
The correct answer is Row A: calcium hydroxide is (s) for solid, and hydrochloric acid is (aq) for aqueous solution.
