Question

In aqueous solution, classify these compounds as strong acids, weak acids, strong bases, weak bases, or other hno3 hbr hf h2co3

Answer 1

Missing question: NH3, CH3COOH, HNO3, HCl, CsOH, H2CO3, H2SO4, Ca(OH)2, HI, HCN, H2CO3.

Strong acids: HNO₃(nitric acid), HBr (hydrobromic acid), HCl(hydrochloric acid), H₂SO₄(sulfuric acid), HI(hydroiodic acid).

Weak acids:CH₃COOH(acetic acid), HF(hydrofluoric acid), H₂CO₃(carbonic acid), HCN(cyanic acid)

Strong bases: CsOH(cesium hydroxide), Ca(OH)₂(calcium hydroxide).

Weak bases: NH₃(ammonia).

Answer 2

Strong acids (and bases) are those which completely dissociate in water to form H+ (or OH- in the case of bases) ions

for example if HA is a strong acid, then the dissociation will be represented as:

HA → H+ + A-

Weak acids ( and bases) are those which only undergo partial dissociation such that there is an equilibrium between the dissociated and undissociated forms.

For example if HA were a weak acid then:

HA ↔ H+ + A-

In the given examples:

1) HNO3, nitric acid is a strong acid

HNO3 → H+ + NO3-

2) HBr, hydrobromic acid is a strong acid

HBr → H+ + Br-

3) HF, hydrofluoric acid is a weak acid

HF ↔ H+ + F-

4) H2CO3, carbonic acid is a weak diprotic acid

H2CO3 ↔ H+ + HCO3-

HCO3- ↔ H+ + CO3²⁻