Goi so mol cua NaCl va NaBr trong moi phan lan luot la a, b
mol
Phan 1: 2NaBr + Cl2 = 2NaCl + Br2.
Co sau
phan ung trong dung dịch chi co muoi NaCl co so mol = 0,2 mol.
ó a+b=0,2 (1)
Phan 2:
NaCl + AgNO3 = NaNO3 + AgCl
a
mol
NaBr + AgNO3 = NaNO3 + AgBr
b b mol
co
a(108+35,5) + b(108+80)= 33,15 (2)
tu (1)
va (2) ta dc: a= 0,1, b=0,1 mol.
ó m = 0,1.2.(23+35,5) +
0,1.2.(23+80)=32,3g
Goi so mol cua NaCl va NaBr trong moi phan lan luot la a, b
mol
Phan 1: 2NaBr + Cl2 = 2NaCl + Br2.
Co sau
phan ung trong dung dịch chi co muoi NaCl co so mol = 0,2 mol.
ó a+b=0,2 (1)
Phan 2:
NaCl + AgNO3 = NaNO3 + AgCl
a a mol
NaBr + AgNO3 = NaNO3 + AgBr
b b mol
co
a(108+35,5) + b(108+80)= 33,15 (2)
tu (1)
va (2) ta dc: a= 0,1, b=0,1 mol.
ó m = 0,1.2.(23+35,5) +
0,1.2.(23+80)=32,3g