-calculez masa si moli acid din solutia data, stiind M,H2SO4= 98g/mol
c=mdx100/ms---> md= 24,5x200/100g= 49g H2SO4
niu=m/M=49g/98g/mol= 0,5molH2SO4
-deduc moli soda si de sare din ecuatia chimica
1mol.............2mol.............1mol
H2SO4 + 2NaOH---> Na2SO4 + 2H2O
0,5mol........x= 1mol..........y= 0,5mol
m,sare=niuxM= 0,5molx142g/mol= ............................calculeaza !!!!
m,soda pura =1molx 40g/mol=......................calculeaza !!!!
-calculez masa de soda impura, cu p=90%
p= m,px100/mi---> mi= 40x100/90g=............................calculeaza
