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 ?
The significance of sodium and potassium in biological fluids: K+ and Na+ cations are present in the red blood cells. The ratio of K+ to Na+ ions in a mammal such as human beings, rabbit, rats and horses is 7:1. These cations accumulate in cells and create a concentration gradient and potential in the membrane. Electric pulse in the every is generated when a chemical is released during activation of discharge the membrane potential.
Magnesium is part of chlorophyll the green colouring matter of plants. Photosynthesis takes place only in the presence of chlorophyll.
Calcium is present in the form of calcium phosphate Ca3(PO4)2 in bones, Ca and Mg play a key role in the formation of phosphorus- oxygen linkage in biological systems for storage of energy. The pyrophosphate hydrolysis which releases energy is controlled by calcium ions. These ions perform important biological functions such as maintenance of ion balance and nerve impulse conduction.
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