\(a/n_{Al_2\left(SO_4\right)_3}=0,2.1=0,2mol\\ n_{Al\left(OH\right)_3}=\dfrac{9,36}{78}=0,12mol\\ Al_2\left(SO_4\right)_3+6KOH\rightarrow2Al\left(OH\right)_3+3K_2SO_4\\ \Rightarrow\dfrac{0,2}{1}>\dfrac{0,12}{2}\Rightarrow Al_2\left(SO_4\right)_3.dư\\ n_{KOH}=0,12:2.6=0,36mol\\ V_{KOH}=\dfrac{0,36}{1,2}=0,3l\)
\(n_{Al_2\left(SO_4\right)_3}=1.0,2=0,2\left(mol\right)\)
PTHH :
\(Al_2\left(SO_4\right)_3+6KOH\rightarrow2Al\left(OH\right)_3\downarrow+3K_2SO_4\)
0,2 0,36 0,12
\(\dfrac{0,2}{1}>\dfrac{0,12}{2}\) --> Tính theo Al(OH)3
\(n_{Al\left(OH\right)_3}=\dfrac{9,36}{78}=0,12\left(mol\right)\)
\(a,V_{KOH}=\dfrac{0,36}{1,2}=0,3\left(l\right)\)
b,