Science, asked by Tonystank503, 1 year ago

which of the following pairs of substances would produce a brown precipitate if the Aqueous solutions were mixed

dhruvbadaya1: Please give the options

Tonystank503: options are:- cuso4, NaOH

Tonystank503: fe2(so4)3,KOH

Tonystank503: AgNO3, NaI

Tonystank503: pls give the ans with explanation

Answers

Answered by dhruvbadaya1

The answer is:
Iron (III) sulphate [Fe2(SO4)3] and Potassium Hydroxide [KOH] will give brown precipitate when mixed. The reaction of the chemical change is:

2Fe(SO4)3 + 6KOH ---> 2Fe(OH)3 + 3K2(SO4)

A double displacement reaction takes place.

Potassium Sulphate is the precipitate which is brown on color.

Tonystank503: how am I going to identify in competitive exams in less time

dhruvbadaya1: You have to learn colors of various substances

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