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Sodium carbonate solution is alkaline due to hydrolysis of:

a) Na+

b) CO3--

c) both Na+ & CO3--

9 years ago

Answers : (1)

879 Points

Dear student,

conjugate bases (i.e. the anion) of weak acids are mildly basic.  Here's why...the conjugate base of any weak acid tends to be a somewhat strong base not in terms of causticity but in terms of affinity for a proton.  When a bicarbonate ion is placed in water, it absconds with a proton from a water molecule, leaving behind a hydroxide ion for every molecule of bicarbonate.  The reaction is as follows:

HCO3- + H2O -> H2CO3 + OH-

This is normally a reversible reaction, but H2CO3 (carbonic acid) has the tendency to lose a CO2 molecule, leaving behind some mildly basic water.


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Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

9 years ago
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