This question is about acids and alkalis - AQA - GCSE Chemistry - Question 2 - 2019 - Paper 1
Question 2
This question is about acids and alkalis.
Which ion do all acids produce in aqueous solution?
Tick (✓) one box.
H+
H-
O2-
OH-
Calcium hydroxide solution reacts... show full transcript
Worked Solution & Example Answer:This question is about acids and alkalis - AQA - GCSE Chemistry - Question 2 - 2019 - Paper 1
Step 1
Which ion do all acids produce in aqueous solution?
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Answer
The ion that all acids produce in aqueous solution is the hydrogen ion (H⁺).
Step 2
Complete the word equation for the reaction.
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Answer
Apparatus A is a burette.
Step 4
What is the reading on apparatus A?
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Answer
The reading on apparatus A is 27.6 cm³.
Step 5
Describe how the student could use titrations to find which sample, P or Q, is more concentrated.
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Answer
The student should measure the volume of dilute sulfuric acid using a pipette and add a few drops of indicator. Next, the student should add a sodium hydroxide solution from the burette while swirling the mixture until a color change occurs, indicating neutralization. The volume of sodium hydroxide used should be recorded. This process should be repeated with the other acid sample. By comparing the volumes of sodium hydroxide used, the student can determine which sample, P or Q, is more concentrated.
