Cupric Citrate

Question 1

Chemical Formula

Answer 1

C6H4Cu2O7

Question 2

Where is it involved?

Answer 2

involved in protein metabolism, the production of RNA, and the synthesis of phospholipids used in the formation of myelin
sheaths.

Question 3

Procedures:

Answer 3

1. Dissolve10 grams of sodium citrate in 25 ml of
   distilled water with the aid of heat
2. Add this hot solution slowly and with stirring to a
   hot cupric sulfate solution prepared by dissolving
   17 grams of cupric sulfate in 50 ml of distilled
   water.
3. Allow the mixture to cool to room temperature and
   filter off the precipitate.
4. Wash the precipitate with distilled water until the
   washings no longer give a test for sulfate ion with
   barium chloride solution
5. Spread out the filter paper and allow the product
   to dry at room temperature in the dark.

Question 4

Identification Test

Answer 4

A. Upon addition of a few mg of a citrate to a mixture of 15ml of pyridine and 5ml of acetoc anhydride: a carmine-red colour is produced

B. Neutral solutions of citrates, when treated with calcium chloride TS, do not yield a precipitate: on boiling they yield a white precipitate which is soluble in acetic acid

C. Solutions of citrates, when boiled with an excess of mercury (II) sulfate TS and filtered necessary, yield a solution which, after being boiled and treated with a few drops of potassium permanganate TS, decolorizes the reagent and yields a white precipitate

Question 5

Compound Formula

Answer 5

C12H10Cu3O14

Question 6

Appearance

Answer 6

Blue to green powder

Question 7

Melting point

Answer 7

350C

Question 8

Density.

Answer 8

1.667 g/cm3

Question 9

Advantage of Cupric sulfate used as an astringent and antiseptic over other salts.

Answer 9

1. Copper assists in the formation of hemoglobin and red blood cells by facilitating iron absorption.