Calculate the mass and volume of carbon dioxide that must be passed through

Calculate the mass and volume of carbon dioxide that must be passed through the sodium hydroxide solution to obtain sodium bicarbonate weighing 21 g.

1. Let’s compose the equation of the chemical reaction:

2NaOH + CO2 = Na2CO3 + H2O.

2. Find the chemical amount of sodium carbonate:

n (Na2CO3) = m (Na2CO3) / M (Na2CO3) = 21 g / 106 g / mol = 0.198 mol.

3. According to the reaction equation, we find the chemical amount, and then the mass and volume of carbon dioxide (Vm is the molar volume, a constant equal to 22.4 l / mol):

n (CO2) = n (Na2CO3) = 0.198 mol.

m (CO2) = n (CO2) * M (CO2) = 0.198 mol * 44 g / mol = 8.72 g.

V (CO2) = n (CO2) * Vm = 0.198 mol * 22.4 l / mol = 4.44 l.

Answer: m (CO2) = 8.72 g; V (CO2) = 4.44 l.