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 responsi... 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 a flame test is the calcium ion, Ca²⁺. Therefore, you should put a cross (X) in box A.
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 solution, a white precipitate of silver chloride is formed. This is due to the reaction between the chloride ions and the silver ions.
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 is lead chloride. Therefore, you should put a cross (X) in box B.
