Question

1.Oblicz masę cząsteczkową soli:

a)CuCO3

b)Ni(NO3)2

c)(NH4)3PO4

2.Olbicz zawartośc procrntową masowy pierwiastków w solach:

a)AlCl3

b)Na2SO4

c)Pb(NO3)2

Dzięki

Answer 1

Zad.1

a) m.cz.CuCO3 = 64u + 12u + 3*16u = 124u

b) m.cz.Ni(NO3)2 = 59u + 2*14u + 6*16u = 183u

c) m.cz.(NH4)3PO4 = 3*14u + 12*1u + 31u + 4*16u = 149u

 

Zad.2

a) m.cz. = AlCl3 = 27u + 3*35u = 27u + 105u = 132u

%Al = (27/132)*100% = 20,45%

%Cl = (105/132)*100% = 79,55%

b) m.cz.Na2SO4 = 2*23u + 32u + 4*16u = 46u + 32u + 64u = 142u

%Na = (46/142)*100% = 32,4%

%S = (32/142)*100% = 22,53%

%O = (64/142)*100% = 45,07%

c) m.cz.Pb(NO3)2 = 207u + 2*14u + 6*16u = 207u + 28u + 96u = 331u

%Pb = (207/331)*100% = 62,54%

%N = (28/331)*100% = 8,46%

%O = (96/331)*100% = 29%