WebThe protective power of the lyophilic colloids is expressed in terms of gold number a term introduced by Zsigmondy. Gold number is the number of milligrams of the protective colloid which prevent the coagulation of 10 ml of red gold sol. When 1 ml of a 10 percent solution of sodium chloride is added to it. Thus, smaller the gold number of ... WebOct 24, 2024 · Gold numbers of protective colloids A,B,C and D are `0.05,0.01,1.10 and 0.005` respectively. The correct order of their protective powers is asked May 6, 2024 in …

Sensitization and Protective colloidal action - Centurion …

WebApr 5, 2024 · Which among these is a better protective colloid ? Solution For Gold numbers of some colloids are : Gelatin : 0.005−0.01, Gum arabic : 0.15−0.25; Oleate : 0.04−1.0; Starch : 15−25. Which among these is WebThe protective value we propose gives the number of grams of a red gold sol which are just protected by 1 g. of the protective agent against flocculation by 1% NaCl solution. Gelatine has a protective value of 90, i.e., 1 g. of gelatine protects 90 g. of gold sol. Amphions are good protecting colloids. One of the ionic groups attaches the protecting … twist machine shifter

The gold numbers of gelatin, haemoglobin and sodium

WebSolution: To avoid the precipitation of lyophobic sol. by the addition of electrolyte, some lyophilic colloid is added to it. Such lyophilic colloid is called protective colloid and the action of lyophilic colloid by the electrolytes is known as protective anion. Gold Number Of a protective colloid is a minimum weight of it milligram which must ... Webgold number: [noun] a measure of the protective power of a lyophilic colloid expressed as the amount of the dry material that just protects a red gold sol under specified conditions — compare protective colloid. WebQ. Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.01 and 0.005 respectively. The correct order of their protective powers is 3120 51 Surface Chemistry Report Error takelessons spanish