How to find a sol is negatively or positively charged?? plss explain detail I don't understand : (
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Answer:
Positively charged sols are mostly metal hydroxides where as negatively charged sols are metal sols or metal sulphide sols. As As2S3 is sulphide of metal As it is a negatively charged sol.
Some examples of negatively charged sols are starch and arsenious sulphide. Positively charged sol of hydrated ferric oxide is formed when FeCl3 is added to excess of hot water and a negatively charged sol of hydrated ferric oxide is formed when ferric chloride is added to NaOH solution. ... Preparation of Lyophilic Sol I.
Examples of positively charged sols: Haemoglobin, metal hydroxides, basic dyes, etc. Examples of negatively charged sols: Metal sols, metal sulphides, gold sols, blood, starch, acidic dyes, etc.
Explanation:
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