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An ore contains magnesium carbonate and barium carbonate - CIE - A-Level Chemistry - Question 14 - 2018 - Paper 1
Question 14
An ore contains magnesium carbonate and barium carbonate. A sample of the ore is dissolved in nitric acid. How could this solution be processed into a magnesium com... show full transcript
Worked Solution & Example Answer:An ore contains magnesium carbonate and barium carbonate - CIE - A-Level Chemistry - Question 14 - 2018 - Paper 1
Step 1
Add H2SO4(aq), filter off the solid barium sulfate.
Answer
To process the solution into magnesium and barium compounds, the most effective method is to add sulfuric acid (H2SO4) to the solution. This will react with the barium ions to form barium sulfate (BaSO4), which is insoluble in water and will precipitate as a solid. This solid barium sulfate can then be filtered off from the remaining solution, leaving behind magnesium ions in the solution.
The reaction can be summarized as follows:
ightarrow ext{BaSO}_4 (s)$$ After filtering off the solid barium sulfate, the remaining solution will contain magnesium ions, which can be further processed to obtain a magnesium compound.