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 hydroc... 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 powdered calcium hydroxide to the beaker, the mixture should be stirred or swirled to ensure that the calcium hydroxide fully dissolves and reacts with the hydrochloric acid. This will help in achieving a uniform mixture and allow for proper measurement of pH.
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 A: calcium hydroxide (s) hydrocholoric acid (aq)
