Răspuns:
NaOH + HNO₃ ---- NaNO₃ + H₂O
300g sol Na0H 8% ... 24 g ....n moli de NaOH = 24 / 40 = 0.6 moli NaOH.
200g sol de HNO₃ 10% ...20g ...n moli de HNO₃ = 20 / 63= 0,3174 moli HNO₃
1mol de HNO₃ ...1 mol de NaNO₃
0,3174moli HNO₃ .... a
a = 0,3174 moliNaNO₃
m = 0,3174 x 85 = 26,979g NaNO₃
Explicație: