a) \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{1,568}{22,4}=0,07\left(mol\right)\\n_{NaOH}=\dfrac{6,4}{40}=0,16\left(mol\right)\end{matrix}\right.\)
Xét \(T=\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{0,16}{0,07}=\dfrac{16}{7}>2\) => Pư tạo muối Na2CO3, NaOH dư
PTHH: \(2NaOH+CO_2\rightarrow Na_2CO_3+H_2O\)
0,14<-----0,07---->0,07
=> mmuối = 0,07.106 = 7,42 (g)
b) mNaOH (dư) = (0,16 - 0,14).40 = 0,8 (g)
c) \(\left\{{}\begin{matrix}C_{M\left(Na_2CO_3\right)}=\dfrac{0,07}{0,2}=0,35M\\C_{M\left(NaOH.dư\right)}=\dfrac{0,16-0,14}{0,2}=0,1M\end{matrix}\right.\)
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