Short Answer TypeWhat happens when:
(i) sodium carbonate reacts with the milk of lime.
(ii) sodium carbonate is added to water.
(iii) sodium carbonate reacts with a dilute mineral acid?
Long Answer TypeHow is sodium hydroxide manufactured? Discuss in brief the details of the process.
Or
With the help of a diagram, show the reactions at the cathode and anode in the manufacture of sodium hydroxide by the Castner - Kellner process.
Short Answer TypeExplain what happens when:
(i) Sodium hydrogen carbonate is heated
(ii) Sodium amalgam reacts with water
(iii) Fused sodium metal reacts with ammonia?
Explain the significance of sodium, potassium, calcium and magnesium in biological fluids ?
State as to why sodium is found to be more useful than potassium.
Sodium ions which are present in blood plasma and in the interstitial fluid help:
(i) in the transmission of nerve signals.
(ii) in regulating the flow of water across cell membrane.
(iii) in the transport of sugars and amino acids. Thus sodium is found to be more useful than potassium (K+ ions are present in the cell fluids).
Industrial uses of sodium metal reflect its strong reducing power, about 60% of world production of sodium are used to male tetraethyl lead PbEt4 for the gasoline antiknocks.
i) It is also used in dye industry.
ii) It is also used for detecting the presence of nitrogen, Sulphur and halogen in organic compounds. It is widely used as sodium amalgam as a reductant.
Switch
