Aluminum hydroxide forms a positively charged sol. Which of the following ionic substances should be most effective in coagulating the sol?

NaCl

CaCl2

Fe2(SO4)3

K3PO4

The idea behind coagulating sols is to use those salts that have the highest + and - charges and the most ions.

so how do i tell which has the highest + and - charges

NaCl

CaCl2

Fe2(SO4)3

K3PO4

The idea behind coagulating sols is to use those salts that have the highest + and - charges and the most ions.

so how do i tell which has the highest + and - charges

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