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Question 67

Spot the formula error in a pantry note: it calls sodium hydrogen carbonate Na2CO3. Which formula should replace it?

  1. NaHCO3Correct answer
  2. NaCO3
  3. Na2CO3
  4. NaH2CO3

Explanation

NaHCO3 includes sodium, hydrogen, carbon, and three oxygens in the required proportions. Na2CO3 omits hydrogen and instead represents sodium carbonate, so it cannot be the requested compound.

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Question 67: Spot the formula error in a pantry note: it calls sodium… · The Periodic Table and Elements · Questena