Q. 323.9( 9 Votes )

Write the formulae of sodium chloride and sodium carbonate. Explain why an aqueous solution of sodium chloride is neutral but an aqueous solution of sodium carbonate is basic (or alkaline). Write chemical equations of the reactions involved.

Answer :

Sodium chloride - NaCl. Sodium carbonate - Na2CO3. When sodium chloride is dissolved in water, its ions dissociate, meaning that they separate. As the sodium ion is positive and a chloride ion is negative, the aqueous solution is neutral. No hydronium ions (that cause acidic behavior) or hydroxide ions (that cause alkaline behavior) are formed. In case of sodium carbonate, it is basic because it gets hydrolysed to some extent and forms sodium hydroxide which is a strong base and carbonic acid which is a weak acid.


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