the impurity absorbed by lead nitrate in purification of h2 gas
Answers
Answer:
The impurities can be removed from hydrogen by passing it through 1. Silver nitrate solution to remove arsine and phosphine
Explanation:
The impure hydrogen is passed through lead nitrate [Pb{NO3}]2 solution to remove hydrogen sulphide gas present as impurity
Explanation:
The impurities can be removed from hydrogen by passing it through
1. Silver nitrate solution to remove arsine and phosphine.
AsH
3
+6AgNO
3
→Ag
3
As+3AgNO
3
+3HNO
3
PH
3
+6AgNO
3
→Ag
3
P+3AgNO
3
+3HNO
3
2. Lead nitrate solution to remove hydrogen sulphide.
Pb(NO
3
)
2
+H
2
S→PbS+2HNO
3
Caustic potash solution to remove sulphur dioxide, carbon dioxide and oxides of nitrogen.
SO
2
+2KOH→K
2
SO
3
+H
2
O
CO
2
+2KOH→K
2
CO
3
+H
2
O
2NO
2
+2KOH→KNO
2
+KNO
3
+H
2
O
4. A drying agent used to dry the gas. Common drying agents such as fused calcium chloride, caustic potash stick and phosphorus pentoxide remove water vapour.
So, the gas is purified and dried and then collected over mercury because mercury does not react with it.