Question

State as to why: 

(a) A solution of Na₂CO₃ is alkaline? 

(b) alkali metals are prepared by electrolysis of their fused chlorides ? 

(c) sodium is found to be more useful than potassium ? 

Answer 1

(a) It undergoes hydrolysis to produce a strong base NaOH . 

(b) When the aq. Solution of any alkali metal is subjected to electrolysis ,H₂ instead of the alkali metal is produced at the cathode. Therfore alkali metals are prepared by electrolysis of their fused chlorides. 

(c) Sodium ions are formed primarily in the blood plasma and in the interstitial fluid which surrounds The cell while potassium ions are primarily present within the cell fluids. Sodium ions are help in the transmission of nerve signals, in regulating the flow of water across cell membranes and in the transport of sugars and amino acids into the cells. Thus, sodium is found to be more useful than potassium.