General Chemistry

Question

a student carried out the reaction below starting with 1.993 of unknown, and found that the mass loss due to CO2 was 0.593. how many moles of X2CO3 were consumed?

Answer 1

Let us assume the reaction taking place is

X₂CO₃(aq) + 2HCl(aq) ==> 2XCl(aq) + CO₂(g) + H₂O(l)

Moles of CO₂ produced = 0.593 g CO₂ x 1 mole/44.0 g = 0.01348 moles CO₂

Moles of X₂CO₃ consumed = 0.01348 moles CO₂ x 1 mol X₂CO₃/mole CO₂ = 0.01348 moles X₂CO₃ used