Bicarbonate ion is an example of a
a. an acid
b. a base
c. an acidic salt
d. a basic salt
e. an amphoteric substance

Question

20-04-2014
Chemistry

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Bicarbonate ion is an example of a
a. an acid
b. a base
c. an acidic salt
d. a basic salt
e. an amphoteric substance

Sagot :

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gfgc13 gfgc13 · Answer 1 · 2014-04-20T14:36:00-04:00

gfgc13 gfgc13

20-04-2014

It is both. We normally think of it as a base because it raises the pH of water by accepting a proton,

HCO3- + H2O <-----> H2CO3 + OH-

but if you add bicarbonate to a strongly basic solution, it actually lowers the pH by donating a proton.

HCO3- + OH- <------> CO3(2-) + H2O. That's why it is an amphoteric substance

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