Question

Sa se calculeze cantitatea de fier respectiv KOH ce reactioneaza cu 730g solutie acid clorhidric de c=10%
Repede plsss

Answer 1

-calculez masa de cid din solutia data

c= mdx100/ms---> md= 10x730/100=73gHCl

calculez moli acid, stiind M,HCl=36,5g/mol

niu= m/M= 73/36,5=>2mol

-calculez moli si masa Fe din ecuatia chimica

1mol.......2mol

Fe   +  2HCl---> FeCl2 +  H2

x.............2mol

x=niu 1mol Fe;   m= niuxM=1molx56g/mol= 56gFe

-calculez moli si masa KOH ,din ecuatia chimica

1mol....1mol

KOH +HCl----> KCl + H2O

x.............2mol

x= niu=2mol KOH;   ,m= niuxM= 2molx56g/mol= 112g KOH