Which of the following concerning the relative strength of acids and bases is/are correct? 1. As the acidity of the acid decreases, the basicity of the conjugate base increases. 2. The hydronium ion is the strongest acid that can be found in aqueous solution. 3. All acids classified as strong acids in aqueous solution have the same acidity in a more acidic solvent like acetic acid.
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Given equal concentrations of the following acids, which exhibits the greatest amount of ionization in water?
The acid strength decreases in the series HBr>HSO4->CH3COOH>HCN>HCO3-. Which of the following is the strongest base?
Which of the following solutes, dissolved in 1.0 kg of water, would be expected to provide the fewest particles and to freeze at the highest temperature?
A solution has a pH of 10.20 at 25 degrees C. What is the hydroxide-ion concentration at 25 degrees C?
The pH of a solution of a strong base is 10.32 at 25 degrees C. What is its hydronium-ion concentration?
Which of the following statements is/are consistent with the Bronsted-Lowry concepts of acids and bases?
In a(n) _____ soluition, at 25 degrees C, the concentrations of H30 + and OH- ions remain equal as they are in pure water.
At 25 degrees C a solution has a hydroxide- ion concentration of 8.22 X 10^-5 M. What is its hydronium-ion concentration?
The acid strength decreases in this series HBr> HSO4->CH3COOH>HCN>HCO3-. Which of the following is the strongest base?
What is the hydroxide-ion concentration at equilibrium in a 0.66 M solution of ethylamine (C2H5NH2, Kb = 4.7 × 10-4) at 25oC?
The following titration curve depicts the titration of a weak base with a strong acid. Which of the labeled points is the equivalence point.
A chemist prepares a buffer solution by mixing 70 mL of 0.15 M NH3 (Kb = 1.8 × 10-5 at 25 °C) and 50 mL of 0.15 M NH4Cl. Calculate the pH of the buffer.
A 0.20 M solution of a weak monoprotic acid is 0.22 % ionized. What is the acid-ionization constant, Ka, for this acid?
What is the pH of an initially 0.428 M solution of a weak monoprotic acid that is 0.11 % ionized when equilibrium is established? (assume Ca/Ka ≥102)
What is Kc for the following equilibrium? For phosphoric acid (H3PO4), Ka1 = 6.9 × 10-3, Ka2 = 6.2 × 10-8, and Ka3 = 4.8 × 10-13.HPO42-(aq) + OH-(aq) PO43-(aq) + H2O(l)
What is the concentration of HCO3- in a 0.010 M solution of carbonic acid, H2CO3? For carbonic acid, Ka1 = 4.2 × 10-7 and Ka2 = 4.8 × 10-11.
What is the hydronium-ion concentration of a soultion formed by combining 400. ml of 0.21 M HNO3 with 600. ml of 0.10 M NaOH at 25 degrees C.