CHARCOAL

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Presentation Topic:- Charcoal Cavity Test

Presented By:- Tannu B.Sc.(Non-Medical) 3149820023

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Charcoal cavity test

It is a dry test which mainly aimed to detect metal cations.

C harcoal block is made up of carbon because carbon is a good reducing agent.

MIXTURE OF SALT LIKE ZnSO4,CuSO4,PbSO4 + Na2CO3

PURPOSE OF ADDING Na2CO3 :- Na2CO3 is that metal carbonates decompose easily on heating to metal oxide.

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O2

Blow pipe

Reducing Flame

O2

Blow pipe

Oxidising Flame

1.)

2.)

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O2

M ixture

l. CuSO4 + Na2CO3 CuCO3 + Na2SO4 (adsorbed by charcoal) II. CuCO3 CuO + CO2 lll. CuO + C Cu + CO

Red residue

Mixture is heated with reducing flame

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Formation of metallic bead

Incrustation with metal

Incrustation without metal

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