A student working in a laboratory prepared an aqueous solution of silver nitrate and kept it in a glass beaker overnight. Next morning he found that the beaker had developed a black turbidity. 1)Why did it develop black turbidity? 2)In your opinion what precautions should have been taken

Asked by  | 12th Jul, 2013, 04:36: PM

Expert Answer:

An aqueous solution of silver nitrate  kept  in a glass beaker overnight developes a black turbidity  due to the formation of silver oxide and eventually metallic silver.
The precautions that  should have been taken are :
a. keep silver nitrate in dark bottles to protect it from sunlight.
b. keep the bottle in dark places .
c. Keep the bottle capped up properly to minimise its contact with air / moisture.      

Answered by  | 12th Jul, 2013, 05:32: PM

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