On the graph below for the zeta potentials of aluminum oxide and silicon dioxide, label the x and y axes and the isoelectric points of both materials
40-
30
AI,O3
20
SiO2
10
0
-10
-20 -
-30
40
2
4
5 6
8
9 10 11121314
How could you use this information to separate silica from alumina?