Question

what happens to an acid or base in a water solution?

Answer 1

ANSWER....

Acids in water solution dissociates H+ ions. Let us consider the reaction between water and HCl in presence of water produce H+ ions. This ion cannot exist alone and hence combines with water molecules and form (H3O)+, the reaction is as follows: -

HCl + H2O ➡(H3O)+ + Cl-
As there is an increase in the protons in the aqueous solution, the solution is acidic in nature.

SIMILARLY,

When base dissolves in water solution produces OH- ion. Let us consider the reaction between water and sodium hydroxide. NaOH in presence of water produce OH- ion. The reaction is as follows: -
NaOH + H2O ➡ Na+ + OH- + H2O
As there is an increase in the hydroxide ions in the solution, the solution is basic in nature.


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Answer 2

ANSWER....
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If we add a strong base to water, the pH will change dramatically.
When this solid is added to water, the ions float apart leading to extra OH- ions in the water.
NaOH➡ (OH)- + (Na)+

The resulting large concentration of (OH)- makes the solution more basic and leads to a dynamic increase in the pH.

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