Further Aspects of Equilibria

What is meant by the Bronsted-Lowry theory of acids and bases?

• Acids are acceptor electron

• Base are donor electron

• Acids are donor proton

• Base are acceptor proton

What is K_w?

• ionic product of water

• acid dissociation constant

• equilibrium constant

• pH

What is the formula for finding [H⁺] for strong base?

How we can find pH of the strong acid?

Calculate the pH of a 0.10 mol dm^-3 solution of ClCH₂COOH (K_a = 1.3 x 10^-5)

• 1.84

• 1.74

• 2.94

• 1.94

Here is an equation for hydrated Fe³⁺ ion.

Which statement is correct?

• [Fe(H₂O)₆]³⁺ is a base

• [Fe(H₂O)₆]³⁺ is a weak acid

• [Fe(H₂O)₅(OH)]²⁺ is an acid conjugate

• [Fe(H₂O)₅(OH)]²⁺ is a weak base

Calculate the value of K_a for 0.0200 mol dm^–3 2-aminobenzoic acid, which has a pH of 4.30.

Calculate pK_a values for 0.100 mol dm^–3 2-nitrophenol, which has a pH of 4.10

• 2.7

• 7.4

• 7.2

• 2.4

Which one is the best indicator for titration sodium hydroxide using ethanoic acid?

• methyl orange

• bromocresol blue

• methyl red

• phenolphthalein

Which one is the best indicator for titration magnesium hydroxide using sulfuric acid?

• bromothymol blue

• bromocresol green

• bromophenol blue

• phenolphthalein