Answer to Question #153762 in General Chemistry for Morayo

Question

Find the mass of sodium trioxoarbonate(IV) needed to give 22.4dm^3 of carbon(IV) oxide at stp in this reaction

Na2Co3 + 2Hcl --> 2NaCl + Co2 + H2O

(Na=23, O=16, C= 12, molar volume of a gas at stp= 22.4dm^3)

Answer 1

sodium trioxoarbonate(IV) needed to give 22.4dm^3 of carbon(IV) oxide at stp in this reaction

Na2Co3 + 2Hcl --> 2NaCl + Co2 + H2O

(Na=23, O=16, C= 12, molar volume of a gas at stp= 22.4dm^3)

Mole ratio = 1:2:2:1:1

Mass of Co₂ = 44g

1 mole = 44g

Therefore 22.4dm³ = 1 mole