Question

Ce cantitate de hidroxid de calciu se obtine in urma reactiei dintre 112 oxid de calciu si apa.​

Answer 1

112 g                 n moli

CaO + H2O --> Ca(OH)2

56                      1

=> n = 112x1/56 = 2 moli Ca(OH)2

n = masa/M.Ca(OH)2

M.Ca(OH)2 = 40+(16+1)x2 = 74 g/mol

=> masa = nxM.Ca(OH)2

= 74x2 = 148 g Ca(OH)2 format