How many grams of carbon dioxide can be absorbed by 1g of lithium hydroxide

Answer 1

Write a balanced equation for the reaction taking place:

2LiOH + CO₂ ==> Li₂CO₃ + H₂O

Now use the molar ratios (stoichiometry) of the balanced equation to find moles of CO₂ absorbed then convert this to grams of CO₂ absorbed:

moles of LiOH present = 1 g LiOH x 1 mole LiOH/23.95 g = 0.0418 moles LiOH

moles of CO₂ that can be absorbed = 0.0418 moles LiOH x 1 mole CO₂/2 moles LiOH = 0.0209 moles CO₂

mass of CO₂ that can be absorbed = 0.0209 moles CO₂ x 44 g/mole = 0.9 g CO₂ (to 1 sig. fig.)