coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separtate from the continuous phase. The minimum concetration of an eletrolyte in milli-moles per litre of the electrolyte solution which required to cause the caogultion of colloidal sol is called coagution value . therefroe higher is the coagulatings power of effective ion, smaller will be the coagultion value of the electrolyte. As_(2)S_(3) sol si negatively charged. Capacity to perciopitate of a given colloid depends upon :
What is the charge on the colloidal particles in the following ? a. Fe(OH)_(3) sol b. As_(2)S_(3) sol c. Colloidal sol of sillver
Which of the following ions will be most effective in coagulating the As_(2)S_(3) sol?
In order to coagulate a fixed amount of As_(2)S_(3), sol, how will NaCl, MgCl_(2)and AcCl_(3) vary in their activity?
Assertion : Fe^(3+) ions can be used for the coagulation of As_(2)S_(3) sol. Reason : Fe^(3+) ions react with As_(2)S_(3) give Fe_(2)S_(3).
A : Al^(+3) can be used for the cagulation of As_(2) S_(3) sol . R : Al^(+3) reacts with As_(2)S_(3) "to give" Al_(2) S_(3)
NARENDRA AWASTHI-SURFACE CHEMISTRY-Level 3 - Assertion - Reason Type Questions
