Question

what is the relationship for carbon and acidity? give 2 examples how carbon acidifies water in the environment.

Answer 1

Hello.....

As a matter of principle the acidity of a carboxylic acid will decrease with increasing length of alkyl chain.The reason is the positive inductive effect of any alkyl group which is the stronger the longer the alkyl group is (if it is nonbranched). This +I-effect weakens the possibility to release a protoin from the COOH group.

The effect can be seen best at the begin of the homolgous series.

formic acid pka 3.77

acetic acid pKa 4.76

propanoic acid 4.87

With any "staircase" on this stairs it fades out, that means the contribution of yet another CH2 group becomes marginal, and the whole lowering of acidity by chain length an asymptotic business.

If then two very similar values are "mixed" this may be due to different authors or sources for these values but cannot be due to chemical structures. Chemically, a C8 acid should be a little bit stronger than a C10 acid.

Answer 2

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1) Carbon forms a compound known as CO2 (carbon dioxide)

It is soluble in water

Thus when it is dissolve in water it forms carbonic acid

CO2 + H2O -------> H2CO3

and as we know H2CO3 (carbonic acid) is an acid thus this carbon compound increase acidity..**


2)also there are many organic acids .for example - Ethanol; Carboxylic acid ; Ethanoic acid which increases acidity ..