Answer to Question #288444 in Organic Chemistry for Mike

Question

a) Find the volume of CO₂ formed at 25 °C and 103 kPa when 0.316 g sodium carbonate is added to 12.0 mL of 0.110 M phosphoric acid.

3 Na₂CO_{3 (s)} + 2 H₃PO_{4 (aq)} −> 2 Na₃PO_{4 (aq)} + 3 H₂O _(l) + 3 CO_{2 (g)}

b) If the leftover amount of excess reactant is thermally decomposed, what volume of gas will be formed at the same conditions as part a)? Show the chemical equation for the decomposition reaction in your answer.

Answer 1

Molar mass of NaCO3 = 105.9

0.316/105.9=0.003

PV=nRT

103×V= 0.113×4.185×298

103V= 3.742

= 0.036ml