" What is coagulation? "

What is the "coagulation" process?

For the coagulation of 10 mL of Fe(OH)_3 sol, 2 mL of 1 MKBr is required. What is the coagulating value of KBr?

For the coagulation of 50 ml of ferric hydroxide sol. 10 mL of 0.5 MKCl is required. What is the coagulation value of KCI?

For the coagulation of 100 ml of arsenious sulphide sol, 5 ml of 1 M KCI is required What is The coagulating power fo KCl?

For the coagulation of 200 mL of As_(2)S_(3) solution, 10 mL of 1 M NaCl is required. What is the coagulating value of NaCl.