Răspuns:
M,CaO= 56g/mol=56kg/kmol
M,Ca(OH)2=74g/mol=74kg/kmol
-calculez masa de var nestins pur
p= m,px100/m,i---> m,p= pxm,i/100= 80x140/100kg= 112kg
-calculez masa de var stins, din ecuatia chimica:
56kg...........................74kg
CaO + H2O----> Ca(OH)2
140kg.........................x
x= 140x74/56kg=185kg Ca(OH)2
Explicație: