What is the concentration (in M) of hydroxide ions in solution at 25.0 C with pH = 4.282?
A 7.0 x 10^-3 M aqueous solution of Ca(OH)2 at 25.0C has a pH of _________.
12.15 (red egg)
Using the data in the table, which of the conjugate bases below is the strongest base?
The Ka for HCN is 4.9 x 10^-10. What is the value of Kb for CN-?
Quint 2.0 (2.0 x 10^-5)
A 0.1 M solution of _______ has a pH of 7.0.
What is the pH of an aqueous solution at 25.0C in which [H+] is 0.0025 M?
The Ka of hydrazoic acid (HN3) is 1.9 x 10^-5 at 25.0C. What is the pH of a 0.35 M aqueous solution of HN3?
2.59 (blue igloo)
A 0.15 M aqueous solution of the weak acid HA at 25.0C has a pH of 5.35. The value of Ka for HA is _______.
A 0.1 M aqueous solution of _________ will have a pH of 7.0 at 25.0C.
Of the following which is the weakest acid?
Of the following acids __________ is not a strong acid.
Classify the following compounds as weak bases (W) or strong bases (S): ammonia fluoride ion sodium hydroxide
The molar concentration of hydroxide ion in pure water at 25.0C is _________.
1.0 x 10^-7
What is the pH of a 0.015 M aqueous solution of barium hydroxide?
12.48 (green hat)
Using the data in the table, which of the conjugate bases below is the weakest base?
The Ka of hypochlorous acid (HClO) is 3.0 x 10^-8 at 25.0C. What is the % ionization of hypochlorous acid in a 0.015 M aqueous solution of HClO at 25.0C?
HA is a weak acid. Which equilibrium corresponds to the equilibrium constant Kb for A-?
A-(aq) + H20 (l) (double arrows) HA(aq) + OH-(aq)
The acid dissociation constant at 25.0C for hypochlorous acid (HClO) is 3.0 x 10^-8. At equilibrium, the molarity of H3O+ in a 0.010 M solution of HClO is ______________.
In the gas phase reaction below, NH3 is acting as a(n) ______________ base but not as a(n) ____________ base.
A- is a weak base. Which equilibrium corresponds to the equilibrium constant Ka for HA?
HA(aq) + H2O(l) (double arrows) H3O+(aq) + A-(aq)