\(a.MgO+2HCl\rightarrow MgCl_2+H_2O\\ n_{MgO}=\dfrac{4}{40}=0,1\left(mol\right)\\ b.n_{HCl}=2.0,1=0,2\left(mol\right)\\ m_{HCl}=0,2.36,5=7,3\left(g\right)\)
\(n_{MgO}=\dfrac{4}{40}=0,1\left(mol\right)\)
a) Pt : \(MgO+2HCl\rightarrow MgCl_2+H_2O|\)
1 2 1 1
0,1 0,2
b) \(n_{HCl}=\dfrac{0,1.2}{1}=0,2\left(mol\right)\)
100ml =0,1l
\(C_{M_{ddHCl}}=\dfrac{0,2}{0,1}=2\left(M\right)\)
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