Question

Calculati cantitatea de solutie NaOH de concentratie 20% necesara in reactia cu 16 g CuSO4.

Answer 1

2NaOH+CuSO4----->Na2SO4+Cu(OH)2

Calculam niu de CuSO4

v(CuSO4)=16 / 160=0,1 mol

M(CuSO4)=64+32+16*4=160 g/mol

Construim raportul:

x/2 = 0,1/1 <=>x=0,1*2 / 1 =0,2 mol

R/S:v(NaOH)=0,2 mol