what are basic salts?

what are indicators?

what are acid base indicators?

what is basicity of an acid?

what is acidity of an base?


Asked by Ukeshwar Sathiamoorthy | 31st Jan, 2014, 06:22: PM

Expert Answer:

1) The salts formed by the partial replacement of the hydroxyl group of a di- or tri- acidic base by an acidic radical.


Mg (OH) 2 + HCl Mg (OH) Cl + H2O

2) They are complex substances that acquire separate colours in acidic and basic media.


Litmus, methyl orange, phenolphthalein etc.

3) An acid-base indicator is either a weak acid or weak base that exhibits a colour change as the concentration of hydrogen (H+) or hydroxyl (OH-) ions changes in an aqueous solution. It is also known as pH indicator.

 Examples of acid-base indicators are as follows:

Methyl orange, phenolphthalein, turmeric juice, red-cabbage juice etc.

4) The number of replaceable hydronium ions (H3O+) in an acid is called basicity of an acid.


The number of hydronium ions (H3O+) that can be produced by the ionisation of one molecule of that acid in aqueous solution.

5) The number of replaceable hydroxyl (OH-) Ions in a base is called the acidity of that base.


The number of hydroxyl ions (OH-) that can be produced by the ionisation of one molecule of that base in aqueous solution.

Answered by Jugal Kishor Rana | 5th Feb, 2014, 04:35: PM

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