a) \(n_{H_2}=\frac{44,8}{22,4}=2\left(mol\right)\)
Mg + 2HCl -> MgCl2 + H2
a) nHCl = 2nH2 = 4 (mol)
=> mHCl = 4*36,5 = 146 (g)
b) nMgCl2= nH2 = 2 (mol)
=> m MgCl2= 2*95= 190 (g)
Mg + 2HCl -> MgCl2 + H2
2...........4.............2.............2 (mol)
nH2= 2 (mol)
mHCl = 73 (g)
mMgCl2 = 95.2=190(g)
nH2 = 44.8/22.4 = 2 mol
Mg + 2HCl --> MgCl2 + H2
2______4_______2_____2
mHCl = 146 g
mMgCl2 = 190 g
nH2 = 44,8/22,4 = 2 mol
Mg + 2HCl --> MgCl2 + H2
2 4 2 (mol)
mHCl = 4.36,5 = 146 g
mMgCl2 = 2.95 = 190 g
a) pt: \(Mg+2HCl\rightarrow MgCl_2+H_2\)
b)\(n_{H_2}=\frac{44,8}{22,4}=2\left(mol\right)\)
tỉ lệ :\(H_2:HCl=1:2\)
theo tỉ lệ: \(n_{HCl}=\frac{2}{1}.n_{H_2}=2.2=4\left(mol\right)\)
\(\Rightarrow m_{HCl}=4.\left(1+35,5\right)=4.36,5=146\left(g\right)\)
c) tỉ lệ:\(H_2:MgCl_2=1:1\)
theo tỉ lệ: \(n_{MgCl_2}=\frac{1}{1}.n_{H_2}=1.2=2\left(mol\right)\)
\(\Rightarrow m_{MgCl_2}=2.\left(24+35,5.2\right)=190\left(g\right)\)