What volume of carbon dioxide can be obtained by the interaction of potassium carbonate with 0.85 mol of phosphoric acid?

1. Interaction proceeds according to the equation:

3K2CO3 + 2H3PO4 = 2K3PO4 + 3H2O + 3CO2 ↑;

2.It can be seen from the reaction that the amounts of carbon dioxide and phosphoric acid are related by the ratio:

3 * n (CO2) = 2 * n (H3PO4);

3.Calculate the amount of carbon dioxide:

n (CO2) = (2 * n (H3PO4)): 3;

n (CO2) = 2 * 0.85: 3 = 0.5667 mol;

4.determine the volume of the evolved gas using the formula:

V (CO2) = n (CO2) * Vm, where Vm = 22.4 dm3 / mol;

V (CO2) = 0.5667 * 22.4 = 12.69 dm3.

Answer: 12.69 dm3.