Mass of H₂O needed : 117 g
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 :
[tex]\tt \dfrac{2}{1}\times 3.25=6.5~moles[/tex]
mass of H₂O(MW= 18 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=6.5~moles\times 18~g/mol\\\\mass=117~g[/tex]
