Răspuns:
199.8g H2O
16.8g x
Explicație:CaO + H2O->Ca(OH)2
56g 74g
MCaO=40+16=56
MCa(OH)2=40+2.17=74
Pe baza reactiei:
x=16.8x 74/56=22.2g Ca(OH)2= md
c%=md .100/ms=> ms=md x 100/c=22.2 x 100/10=222g solutie' dar
ms=md=mH20 => mH2O=222-22.2=199.8g apa