In an experiment, powdered calcium hydroxide was added to dilute hydrochloric acid and the pH was measured - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2023 - Paper 1
Question 5
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 Combined Science - Question 5 - 2023 - Paper 1
Step 1
State what should be done after step 2 to make sure that any reaction is complete.
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Answer
After adding the powdered calcium hydroxide, the beaker should be stirred or swirled to ensure that the calcium hydroxide dissolves completely and reacts fully with the hydrochloric acid.
Step 2
Complete the word equation for the reaction.
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Answer
calcium hydroxide + hydrochloric acid → calcium chloride + water
Step 3
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 row is C, which indicates that calcium hydroxide is in an aqueous state (aq) while hydrochloric acid is also in an aqueous state (aq).
