Question

Reactioneaza 112 g fier cu o cantitate de acid sulfuric. Calculati cantitatea de acid sulfuric intrata in reactie si numarul de moli de hidrogen degajati din reactie.

Answer 1

Răspuns:

112g X g Y g

Fe + H2SO4 -> FeSO4 + H2

55,84g 98,07g 2g

M(Fe)=55,84 g/mol

M(H2SO4)=98,07 g/mol

M(H2)=2g

X=(112 × 98,07)/55,84

X= 196,70 g

Y=(2 × 112)/55,84

Y=4 g

n=m/M

n=4/2

n=2 moli H2