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WHAT ARE THE FORMULAS FOR FEHLING A AND B SOLUTONS?

WHAT ARE THE FORMULAS FOR FEHLING A AND B SOLUTONS?

Grade:12

2 Answers

vamshi
199 Points
8 years ago
Fehling's A is aqueous solution of copper(II) sulphate, which is deep blue. Fehling's B is a colorless solution of aqueous potassium sodium tartrate (also known as Rochelle salt) made in a strong alkali, commonly with sodium hydroxide. Typically, the L-tartrate salt is used. The copper(II) complex in Fehling's solution is an oxidizing agent and the active reagent in the test.

The deep blue active ingredient in Fehling's solution is the bis(tartrate) complex of Cu2+. The tartrate tetraanions serve as bidentate ligands giving the bistartratocuprate(II)6−.[2]

Kushagra Madhukar
askIITians Faculty 628 Points
4 years ago
Dear student,
Please find the attached answer to your problem below.
 
Fehling's A is aqueous solution of copper(II) sulphate, which is deep blue. Fehling's B is a colorless solution of aqueous potassium sodium tartrate (also known as Rochelle salt) made in a strong alkali, commonly with sodium hydroxide. Typically, the L-tartrate salt is used. The copper(II) complex in Fehling's solution is an oxidizing agent and the active reagent in the test.
 
The deep blue active ingredient in Fehling's solution is the bis(tartrate) complex of Cu2+. The tartrate tetraanions serve as bidentate ligands giving the bistartratocuprate(II)6−
 
Hope it helps.
Thanks and regards,
Kushagra

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