Answer to Question #276673 in General Chemistry for grace

Question

Find the mass of sodium trioxocarbonate iv needed to give a volume of 22.4dm at stp

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