Question

calculeaza cantitatea de var stins obtinut din 140 kg. var nestins de putitate 80%.Ac=12,Ao=16,Aca=40,Ah=1​

Answer 1

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: