• anonymous
A mixture of sodium chloride and calcium bicarbonate underwent 3 consecutive processes: 1) Mixture was placed in water and heated. 2) Resulting mixture + solution was filtered. Residue X was left in the paper while the filtrate is in a conical flask. 3) The filtrate is evaporated into dryness with solid Y left. Which one of the following would be X and Y? letter of choice) x ; y a) Calcium carbonate ; sodium chloride b) Calcium carbonate ; sodium hydroxide c) Calcium chloride ; sodium carbonate d) Sodium chloride ; calcium carbonate Much thanks in advance!
  • Stacey Warren - Expert
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  • katieb
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  • JFraser
compounds containing the bicarbonate ion are generally unstable, and will decompose with heat forming a metal carbonate and water. In this case, calcium carbonate is formed. Calcium carbonate is also insoluble in water. The other product, sodium chloride, is soluble in water. Hope that helps~

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