1 Tests can be carried out on salts to identify the ions present in the salts - Edexcel - GCSE Chemistry - Question 1 - 2015 - Paper 1
Question 1
1 Tests can be carried out on salts to identify the ions present in the salts.
(a) (i) A flame test on a salt produces an orange-red colour.
Which ion is responsib... show full transcript
Worked Solution & Example Answer:1 Tests can be carried out on salts to identify the ions present in the salts - Edexcel - GCSE Chemistry - Question 1 - 2015 - Paper 1
Step 1
Which ion is responsible for the orange-red colour?
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Answer
The ion responsible for the orange-red colour in the flame test is the potassium ion, K⁺. Thus, the correct answer is C.
Step 2
Describe what is seen when the silver nitrate solution is added.
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Answer
When silver nitrate solution is added to the acidified chloride salt, a white precipitate of silver chloride is observed. This occurs due to the reaction between the silver ions and the chloride ions, which forms silver chloride, represented by the equation:
Ag+(aq)+Cl−(aq)→AgCl(s)
Step 3
Which of these salts is insoluble in water?
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Answer
The salt that is insoluble in water among the options provided is lead chloride. Therefore, the correct answer is B.
