Question

If 3.25 moles of CaC2 are consumed in the reaction, how many grams of H2O are needed?

Answer 1

Mass of H₂O needed : 117 g

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂

moles of CaC₂ = 3.25

From the equation, mol ratio of CaC₂ : H₂O = 1 : 2 , so mol H₂O :

`\tt (2)/(1)* 3.25=6.5~moles`

mass of H₂O(MW= 18 g/mol) :

`\tt mass=mol* MW\\\\mass=6.5~moles* 18~g/mol\\\\mass=117~g`