Which method is most suitable for preparing a sample of insoluble barium sulfate salt?

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Question

Which method is most suitable for preparing a sample of insoluble barium sulfate salt?

Accepted Answer

Mixing solutions of barium chloride and sodium sulfate and filtering the precipitate — Barium sulfate is insoluble, so it is prepared by precipitation — mixing two soluble solutions that each contain one of the required ions. Barium chloride and sodium sulfate solutions are mixed, and barium sulfate precipitates and is collected by filtration. Option A would not work as barium sulfate would coat the barium oxide preventing full reaction. Option C would not work because barium sulfate would also coat the barium carbonate. Option D would produce barium sulfate precipitate immediately, making it impossible to determine the end point with an indicator.

Answer

Mixing solutions of barium chloride and sodium sulfate and filtering the precipitate

Answer

Reacting barium oxide with dilute sulfuric acid and evaporating to dryness

Answer

Adding excess barium carbonate to sulfuric acid and filtering off the excess

Answer

Neutralising barium hydroxide solution with sulfuric acid using an indicator

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