\(n_{H_2S}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
\(n_{NaOH}=0,15.1=0,15\left(mol\right)\)
Xét tỉ lệ: \(\dfrac{n_{NaOH}}{n_{H_2S}}=\dfrac{0,15}{0,1}=1,5\)
=> Tạo ra 2 muối Na2S, NaHS
PTHH: 2NaOH + H2S --> Na2S + 2H2O
a------>0,5a---->0,5a
NaOH + H2S --> NaHS + H2O
b----->b-------->b
=> \(\left\{{}\begin{matrix}a+b=0,15\\0,5a+b=0,1\end{matrix}\right.\)
=> a = 0,1 (mol); b = 0,05 (mol)
=> \(\left\{{}\begin{matrix}m_{Na_2S}=0,05.78=3,9\left(g\right)\\m_{NaHS}=0,05.56=2,8\left(g\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}C_{M\left(Na_2S\right)}=\dfrac{0,05}{0,15}=0,33M\\C_{M\left(NaHS\right)}=\dfrac{0,05}{0,15}=0,33M\end{matrix}\right.\)
Đúng 4
Bình luận (0)
