Acid Strength and Properties Assessment

The video tutorial covers acidity trends in halo acids, oxyacids, hydrides, and polyprotic acids. Halo acids become stronger down the periodic table, with HF being the weakest due to strong bond strength. Oxyacids increase in strength with more oxygen, stabilizing the conjugate base. Hydrides' acidity increases down and to the right on the periodic table, while hydrogen bound to metals is basic or neutral. Polyprotic acids have multiple protons, but only the first dissociation is significant for acid strength, except during titration.

Which of the following halo acids is the strongest?

• HF

• HCl

• HI

• HBr

Why is HF considered the weakest halo acid?

• It dissociates completely.

• It is the least electronegative.

• It has the strongest bond strength.

• It has the largest atomic radius.

What is the general rule for the strength of oxyacids?

• More oxygen atoms increase strength.

• Less oxygen atoms increase strength.

• More hydrogen atoms increase strength.

• More nitrogen atoms increase strength.

Which of the following acids is stronger due to resonance?

• HClO

• HClO2

• HClO3

• HClO4

How does the acidity of hydrides change on the periodic table?

• Increases down and to the right

• Decreases down and to the right

• Increases up and to the left

• Decreases up and to the left

What is the nature of hydrides when hydrogen is bound to a metal?

• Always basic or neutral

• Always acidic

• Always neutral

• Always basic

What defines the strength of a polyprotic acid?

• The total number of oxygen atoms

• The last proton that dissociates

• The first proton that dissociates

• The number of protons it can donate

Which of the following is a triprotic acid?

• H2SO4

• H2CO3

• H3PO4

• HCl

When are the second and third protons of a polyprotic acid considered?

• During resonance analysis

• During pH calculations

• During electronegativity assessment

• During titration

Which acid is not classified as strong despite having two hydrogens?

• HCl

• H2SO4

• H2CO3

• H3PO4