2X + Cl2 -> 2XCl
Theo PTHH ta có:
nX=nXCl
\(\dfrac{18,4}{X}=\dfrac{46,8}{X+35,5}\)
=>X=23
Vậy X là Na
b;
Áp dụng ĐLBTKL có cả bài ta có:
mNa + mCl=mNaCl
=>mCl=46,8-18,4=28,4(g)
nCl=\(\dfrac{28,4}{35,5}=0,8\left(mol\right)\)
VCl2=22,4.0,8=17,92(lít)
a) PTHH: \(X+\dfrac{1}{2}Cl_2\rightarrow XCl\)
Theo đề:
\(n_X=\dfrac{18.4}{X}\left(mol\right)\); \(n_{XCl}=\dfrac{46.8}{X+35.5}\left(mol\right)\)
Theo PT: nX = nXCl hay:
\(\dfrac{18.4}{X}=\dfrac{46.8}{X+35.5}\Leftrightarrow X=23\left(đvC\right)\)
Vậy X là Natri (Na).
b) \(Na+\dfrac{1}{2}Cl_2\rightarrow NaCl\)
0.8(mol)...0.4(mol)
Có: nNa = \(\dfrac{18.4}{23}=0.8\left(mol\right)\) mà theo phương trình:
\(n_{Cl_2}=0.5.n_{Na}=0.5.0.8=0.4\left(mol\right)\)
\(\Rightarrow V_{Cl_2}=0.4.22.4=8.96\left(l\right)\)
\(n_X=\dfrac{18.4}{X}\left(mol\right)\)