a)
\(m_{dd} = m_{HCl} + m_{H_2O} = 12 + 130 = 142(gam)\)
\(\Rightarrow C\%_{HCl} = \dfrac{12}{142}.100\% = 8,45\%\)
b)
\(V_{dd} = \dfrac{m}{D} = \dfrac{142}{1,05} =135(ml) = 0,135(lít)\)
\(\Rightarrow C_{M_{HCl}} = \dfrac{ \dfrac{12}{36,5}}{0,135} = 2,43M\)
Đúng 2
Bình luận (0)