How acid is strong and weak?

Answer 1

A strong acid dissociates more fully than a weak

Answer 2

Acids and bases may be very strong or weak. Strength refers to how well an acid or base separates into ions in water. In a strong acid, most of the molecules break up into solutions. In a weak acid, fewer molecules break up into ions.

A strong acid is an acid which ionises almost completely when dissolved in water to produce a high concentration of hydrogen ions.

A weak acid is an acid which partially ionises when dissolved in water to produce a low concentration of hydrogen ions.

("Strong" and "weak" don't really refer to the power of the acid in question. One of the most hazardous acids of all is hydrofluoric acid, which is a weak acid.)

Don't confuse ionisation with dissociation - two completely different things!

(A strong acid dissociates more fully than a weak acid)

Answer 3

Strong acids ionize completely when dissolved in water. Weak acids ionize only partially in water. The degree to which a weak acid ionizes decreases as the concentration increases. Because of this, a given concentration of a strong acid will have a low pH than one of a weak acid.

Answer 4

An acid is a substance that produces hydronium ions (H3O+) in water. This is called dissociation. Example of dissociation with hydrochloric acid: HCl + H2O --> H3O+ + Cl-

A strong acid dissociates completely in water.

The strong acids are:

Hydrochloric acid (HCl)

Hydrobromic acid (HBr)

Hydroiodic acid (HI)

Nitric acid (HNO3)

Sulfuric acid (H2SO4)

Perchloric acid (HClO4)

Sometimes chloric acid (HClO3) and periodic acid (HIO4) are listed as strong ac well.

All other acids are assumed to be weak.

A weak acid only partially dissociates in water and establishes and equilibrium..

Example with hypochlorous acid: HClO + H2O <--> H3O+ + ClO-

Some weak acids are stronger than other, meaning that some dissociate to a greater degree.

Answer 5

A strong acid is an acid that dissociates completely when in aqueous solution. A weak acid is an acid that does not dissociate completely when in aqueous solution.

Example of strong acid: HCl(aq) ----> H+(aq) + Cl-(aq) [No HCl molecules left]

Example of weak acid: (many) CH3COOH(aq) ----> (some) CH3COOH(aq) + (rest) CH3COO- + H+

[leaving some or more CH3COOH(aq) unchanged]

Answer 6

The terms strong and weak when applied to acids and bases refers to the degree to which they dissociate in aqueous solution. If the acid fully dissociates, then it is a strong acid. If not, then it is a weak acid. An example of a strong acid is HCl (hydrochloric acid). An example of a weak acid is acetic acid (CH3COOH). The terms weak and strong do NOT refer to the concentration of the acid or base, but only to the degree of dissociation.

Answer 7

A strong acid completely breaks apart into ions when mixed with water. A weak acid only partially breaks apart.

Answer 8

A strong acid donates almost 100% of its protons in solution. A weak acid can donate as few as 1% of its protons in solution.

Answer 9

A strong acid ionizes partially in water while a weak acid ionizes fully in water.

Answer 10

A strong acid is highly dissociated in water.