\(n_{MgO}=\dfrac{8}{40}=0,2\left(mol\right)\)
1) Pt : \(MgO+2HCl\rightarrow MgCl_2+H_2O|\)
1 2 1 1
0,2 0,4 0,2
2) \(n_{MgCl2}=\dfrac{0,2.1}{1}=0,2\left(mol\right)\)
⇒ \(m_{MgCl2}=0,2.95=19\left(g\right)\)
3) \(n_{HCl}=\dfrac{0,2.2}{1}=0,4\left(mol\right)\)
\(m_{HCl}=0,4.36,5=14,6\left(g\right)\)
\(m_{ddHCl}=\dfrac{14,6.100}{10}=146\left(g\right)\)
4) \(m_{ddspu}=8+146=154\left(g\right)\)
\(C_{MgCl2}=\dfrac{19.100}{154}=12,34\)0/0
Chúc bạn học tốt
1) MgO+HCl→MgCl2+H2O
2)nMgO=8/40=0.2 mol
MgO+2HCl→MgCl2+H2O
0.2 0.2 mol
mMgCl2=0.2*95=19 g
3)nHCl=0.2*2=0.4 mol
mHCl=0.4 * 36.5=14.6 g
4)mdd HCl=14.6*100/10=146 g
mdd muối sau pứ=8+146=154 g
C%=19/154 *100%=12.33 %