Potassium hydrogen carbonate decomposes according to the reaction below: 2 KHCO₃(s) → K₂CO₃(s) + CO₂(g) + H₂O(l)
How many moles of potassium carbonate are produced if 421 g of potassium hydrogen carbonate is heated?

Question

Quizplus · Accepted Answer

The molar mass of potassium hydrogen carbonate (KHCO3) is approximately 100 g/mol. Therefore, 421 g corresponds to 421 g / 100 g/mol = 4.21 mol of KHCO3. According to the balanced chemical equation, 2 moles of KHCO3 produce 1 mole of K2CO3. Thus, 4.21 moles of KHCO3 will produce 4.21 / 2 = 2.105 moles of K2CO3, which rounds to 2.10 moles.

Potassium Hydrogen Carbonate Decomposes According to the Reaction Below: 2