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Will carboxylic acid when added to water lower the pH of the water?

Carboxylic acid is a misnomer.

Below is equation for the dissociation of citric acid when dissolved in water into 3 H3O+1 ions and 1 C6H5O7-1 ion

H3C6H5O7 + 3 H2O = 3 H3O+1 + C6H5O7-1

Organic acids are carboxylic acids because they have one of more carboxyl groups attached to an organic molecule such as citric acid. The formula is H3C6H5O7. The structure is shown below.

A carboxyl group has a carbon atom with an O double bonded to it and an O-H single bonded to it. Do you see 3 of carboxyl groups on the structure below? The H attached to the single bonded O is the acid H. These 3 H+1 ions will bond to 3 water molecules forming the 3 hydronium ions. pH measures the concentration of hydronium ions in a solution.

pH = - log [H3O+1] ( negative log of hydronium concentration)

The more H3O+1 ions, the higher the pH.

..………..….…..H

…………..….....!

………...H…....O..H

………....!.......!...!

O=C…..C…..C….C…..C = O

…..!.......!.....!.....!.....!

….O…....H….O....H....O

….!..............!............!

…H………......H…….....H

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14y ago
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13y ago

No, the pH of any acidic solution will increase as water is added. A low pH is more acidic than a high pH.

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14y ago

Carboxylic acid are weak and less soluble acids in water but are acids so they decrease the pH value of water from 7 to 6 or 5.

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12y ago

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Q: Does the pH of carboxylic acid decreases when water is added to it?
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What happens to water solubility as chain length increases in carboxylic acid?

It decreases. And melting point increases.


What are the products of an ester and water?

An alcohol and a carboxylic acid salt (carboxylic acid if protonated at end of reaction).


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A fatty acid salt is a kind of carboxylic acid salt. But not all carboxylic acid salts are fatty acid salts.


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Is vinegar a carboxylic acid?

Vinegar is ethanoic acid CH3COOH, so yes it is a carboxylic acid.


Why are carboxyl groups hydrophilic?

the carboxylic group normally came from carboxylic acid. Hence, the carboxylic acid is polar acid. and the polarity came from the carboxylic group for that it is hydrophilic group


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Vinegar is dilute acetic acid and thus contains a carboxylic acid.


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carboxylic acid and its derivatives


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It depends on witch carboxylic acid you mean, there are thousands carboxylic acids.