Question

Subiectul 3 va rog!!!!! Dau coroana!!!

Answer 1

Răspuns:

a) MgCO3 = MgO + CO2

MgO + 2HCl = MgCl2 + H2

b) n MgCO3 = m / M = 3 moli MgCO3

1 1 1

MgCO3 = MgO + CO2

3 3 3

n CO2 = n MgCO3 = 3 moli CO2

V CO2 = n * Vm = 3 * 22.4 = 67.2 L CO2

c) n MgO = n MgCO3 = 3 moli MgO

1 2

MgO + 2HCl = MgCl2 + H2

3 6

n HCl = 2n MgO = 6 moli HCl

m HCl = 6*36.5 = 219g HCl

msol HCl = md/c% * 100 = 219/20 * 100 = 1095g sol HCl