What is the pH of a 0.075M solution of ethylamine, C2H5NH2, which has a Kb = 6.4 x 10-4?

From the following values for a calculated rate constant, which one would be for a second-order reaction?

What is the pH of a solution prepared by taking 10.0 mL of 0.45 M HClO4 and diluting it to a final volume of 250 mL?

With the polyprotic acid like H3PO4, the dissociation of which hydrogen atom gives the largest Ka value?

What is the acid dissociation constant, Ka, for propionic acid, C2H5COOH in water?

The hydrogen carbonate ion (HCO3-) is amphiprotic in water. If HCO3- is the Brønsted-Lowry base, what is the conjugate acid?

The rate of a particular reaction was measured at several different temperatures. A graph of ln k versus 1/T gives a slope of -2.82 x 103 K. Calculate the activation energy for the reaction given R is the gas constant (8.314 J/mol-K) given Ea = -slope x R.

Based on their activation energies and energy changes and assuming that all collision factors are the same, rank to the following reactions from slowest to fastest. (i) Ea= 45 kJ/mol; ΔE=–25 kJ/mol (ii) Ea= 35 kJ/mol; ΔE=–10 kJ/mol (iii) Ea= 55 kJ/mol; ΔE=10 kJ/mol

If the pH of a solution is 7.27, which of the following statements is true?

Which best explains why HF is not a strong acid?