8 moli / 2 = 4 moli CuO care reactioneaza cu HCl si H2SO4
4 moli md a g
CuO + 2HCl => CuCl2 + H2O
1 2x36,5 18
md = 4x2x36,5/1 = 292 g HCl
stim ca c% = mdx100/ms
=> ms = mdx100/c% = 292x100/36,5 = 800 g sol. HCl
4 moli md b g
CuO + H2SO => CuSO4 + H2O
1 98 18
md = 4x98/1 = 392 g H2SO4
stim ca c% = mdx100/ms
=> ms = mdx100/c% = 392x100/49 = 800 g sol. H2SO4
a = 4x18 = 72 g
b = 4x18 = 72 g
=> a+b = 144 g apa formata