\(n_{HNO_3.0,5M}=0,1\times0,5=0,05\left(mol\right)\)
\(n_{HNO_3.0,1M}=0,2\times0,1=0,02\left(mol\right)\)
\(\Rightarrow n_{HNO_3}mới=0,05+0,02=0,07\left(mol\right)\)
\(V_{ddHNO_3}mới=100+200=300\left(ml\right)=0,3\left(l\right)\)
\(\Rightarrow C_{M_{HNO_3}}=\frac{0,07}{0,3}=0,233\left(M\right)\)
nHNO3(0.5M) = 0.1*0.5 = 0.05 mol
nHNO3(0.1M) = 0.2*0.1 0.02 mol
nHNO3 = 0.05 + 0.02 = 0.07 mol
VddHNO3 = 0.1+0.2 = 0.3 l
CM HNO3 = 0.07/0.3= 0.233M