Răspuns:
Explicație:
c = md × 100 : ms => md = c × ms : 100
md = 5 × 300 : 100 = 15g KOH
M(KOH) = A(K) + A(O) + A(H) = 56 g/mol
15g x
KOH + HCl → KCl + H₂O
56g 1 mol
x = 15 : 56 = 0,26 mol KCl
M(KCl) = A(K) + A(Cl) = 39 + 35,5 = 74,5 g/mol
m(KCl) = 0,26 × 74,5 = 19,95g
-Mihai