Question

se trateaza cu HNO3 2 mooli de CAO. ce produsi rezulta si in ce cantitati?

Answer 1

2HNO3 + CaO = Ca(NO3)2 + H2O

2 moli HNO3............1 mol Ca(NO3)2......1 mol H2O
2 moli HNO3...........x=1 mol Ca(NO3)2....y=1 mol H2O


2 moli HNO3...............1 mol Ca(NO3)2
2 moli HNO3................x moli

x=2*1/2 = 1 mol Ca(NO3)2

MCa(NO3)2 = ACa+2(AN+3AO) = 40+2(14+3*16) = 164g/mol

n=m/M=>m=n*M=1*164=164g Ca(NO3)2

2 moli HNO3..................1 mol H2O
2 moli HNO3...................x moli

x=1*2/2 = 2/2 = 1 mol H2O

MH2O = 2AH+AO=2*1+16=18g/mol

n=m/M=>m=n*M=1*18=18g H2O

n(niu)- nr de moli

m- masa(g)

M(miu) - masa molara (g/mol)