a) HCl+ AgNO3-------->AgCl+HNO3
m AgNO3= 250.13,6/100=34(g)
m AgNO3=340170=0,2(mol)
Theo pthh
n HCl=n AgCl=0,2(mol)
CM HCl=0,2/0,3=0,667(M)
b) HCl+ NaHCO3--->NaCl+H2O+CO2
n CO2=6,72/22,4=0,3(mol)
Theo pthh
n HCl=n CO2=0,3(mol)
m HCl=0,3.36,5=10,95(g)
C% HCl=10,95/130.100%=8,42%
Chúc bạn học tốt
a)
\(n_{AgNO3}=\frac{250.13,6\%}{170}=0,2\left(mol\right)\)
\(HCl+AgNO_3\rightarrow AgCl+HNO_3\)
0,2 _____0,2
\(CM_{HCl}=\frac{0,2}{0,3}=\frac{2}{3}M\)
b)
\(NaHCO_3+HCl\rightarrow NaCl+CO_2+H_2O\)
0,3_________________________0,3_____________
\(n_{CO2}=\frac{6,72}{22,4}=0,3\left(mol\right)\)
\(\rightarrow C\%_{NaHCO3}=\frac{0,3.84}{130}.100\%=19,38\%\)