Răspuns:
CU sol.BaCl2 reactioneaza numai H2SO4
M,BaSO4= 233g/mol M,H2SO4=98g/mol
niu=m/M= 23,3/233mol=0,1mol
H2SO4 + BaCl2---> BaSO4 + 2HCl
1mol...........................1mol
x..................................0,1mol
x= niu= 0,1molH2SO4---------> m= niuxM=0,1molx98g/mol= 9,8gH2SO4
m,HNO3= 80-9,8=>70,2g
80g amestec........70,2gHNO3.........................9,8gH2SO4
100G.................................X...........................................Y
X=87,75%HNO3
Y=12,25%H2SO4
Explicație: