a. Find out the mass of NaOH needed for 264 g CO2 to react completely.

Question

Look at the balanced equation given. 

2NaOH + CO₂ → Na₂ CO₃ + H₂O 

a. Find out the mass of NaOH needed for 264 g CO₂ to react completely. 

b. Find out the total number of moles of water molecules when CO₂ reacts.

Answer 1

a. GMM of CO₂ = 44 g 

∴ Number of moles in the molecule of 264 g

CO₂ = \(\frac{264}{44}\) = 6 

According to the equation NaOH needed for the reaction of 1 mole CO₂ = 2 moles 

∴ NaOH needed for the reaction of 6 moles

CO₂ = 2 × 6 = 12 moles

GMM of NaOH = 23 + 16 + 1 = 40 g 

Total mass of NaOH = 12 × 40 = 480 g 

b. H₂O formed when lmole CO₂ reacts = 1 mole 

∴ Total number of moles of water molecules when 6 mole CO₂ reacts = 6 moles