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
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 responsible... show full transcript
Worked Solution & Example Answer: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 copper ion, Cu<sup>2+</sup>. Therefore, the correct option is B.
Step 2
Describe what is seen when the silver nitrate solution is added to the mixture.
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Answer
When silver nitrate solution is added to the acidified chloride solution, a white precipitate of silver chloride (AgCl) is formed. This is observed as a white cloudy substance in the solution.
Step 3
Which of these salts is insoluble in water?
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Answer
The salt that is insoluble in water is lead chloride. Therefore, the correct option is B.
