From the valences or the oxidation states. Na in NaCl is +1. Cl is -1.
CaCl2 will have Ca+2 and 2 Cl^- so CaCl2 will be more effective than NaCl. (NaCl will cause coagulation, too, but it won't be as effective as CaCl2).
K3PO4 is 3K+ and 1 PO4^-3.
I will leave Fe2(SO4)3 for you to do.
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
2 answers
i think it is your mom
2 answers