Question

1,625 g metal divalent reactioneaza cu o solutie de acid clorhidric 30% rezultand 0,05 g hidrogen.afla cantitatea folosita de acid clorhidric 30%

Answer 1

Notam metalul: M
A g...73g..................2g
M + 2HCl -> MCl2 + H2
1,625g.x=?..............0,05g
A=1,625*2/0,05=65g => M: Zn
x=1,625*73/65=1,825g HCl
30/100=1,825/ms => ms=6,08g solutie HCl 30%