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There are two unlabelled solutions - HSC - SSCE Chemistry - Question 8 - 2017 - Paper 1
Question 8
There are two unlabelled solutions. One is barium nitrate and the other lead nitrate. Which of the following could be added to the two unlabelled solutions to disti... show full transcript
Worked Solution & Example Answer:There are two unlabelled solutions - HSC - SSCE Chemistry - Question 8 - 2017 - Paper 1
Step 1
Which of the following could be added to the two unlabelled solutions to distinguish between them?
Answer
To distinguish between barium nitrate and lead nitrate, the appropriate reagent to add is sodium chloride (option C). When sodium chloride is added to a solution of lead nitrate, a white precipitate of lead(II) chloride forms due to the insolubility of lead chloride in water. In contrast, no such precipitate forms with barium nitrate, as barium chloride remains soluble in solution.
This difference in solubility allows for the differentiation between the two nitrates based on the formation of the precipitate.