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A saturated solution of barium carbonate was stored in a flask - HSC - SSCE Chemistry - Question 11 - 2019 - Paper 1
Question 11
A saturated solution of barium carbonate was stored in a flask. Solid barium carbonate containing radioactive carbon-14 was added to the solution. The mixture was al... show full transcript
Worked Solution & Example Answer:A saturated solution of barium carbonate was stored in a flask - HSC - SSCE Chemistry - Question 11 - 2019 - Paper 1
Step 1
Radioactivity could reasonably be expected to be found in
Answer
In this scenario, we start with a saturated solution of barium carbonate. When solid barium carbonate containing radioactive carbon-14 is added, it dissolves until saturation is reached. The radioactive carbon-14 will be present in the barium carbonate added.
After allowing the mixture to stand, when the solution is filtered, the residue will consist of any undissolved solid barium carbonate, and the filtrate will contain the saturated solution.
Since the solid barium carbonate added was radioactive, the radioactivity will remain in the residue as undissolved particles. Additionally, if any measurable amount of barium carbonate dissoved, it could also contribute to the radioactivity in the filtrate.
Thus, radioactivity could reasonably be expected to be found in both the residue and the filtrate.