1. Calculate the hydronium ion concentration and pH for a 0.042
M solution of sodium formate, NaHCO2. Kb for reaction of HCO2- ion
with water is 5.6 × 10-11.
[H3O+]----------------M
pH---------------------
2.
What are the equilibrium concentrations of NH3,
NH4+, and OH- in a 0.42 M solution
of ammonia? What is the pH of the solution?
Kb = 1.8 * 10^-5
[OH-] ----------------------- M
[NH4+] ----------------------M
[NH3] ---------------------- M
pH----------------------------
Calculate the hydronium ion concentration and pH for a 0.050 M
solution of sodium formate, NaHCO2. Kb for reaction of HCO2- ion
with water is 5.6 × 10-11.
[H3O+] =_____ M
pH =______
Calculate the pH when 65.0 mL of 0.269 M of a certain monoprotic
weak acid, HA, is mixed with 65.0 mL of 0.269 M sodium hydroxide
solution at 25 °C. For HA, the Ka is 6.1× 10–5.
A. Calculate the hydronium ion concentration in an aqueous
solution of 0.185 M carbonic
acid, H2CO3
(aq)
B. Calculate the concentration of
HCO3- in an aqueous solution
of 0.1860 M carbonic acid,
H2CO3 (aq).
The hydronium ion concentration of a pH neutral
aqueous solution is decreased by three orders of magnitude.
Is it acidic or basic?
pH increase or decrease?
By how many pH units does the pH change?
Does the molar concentration of hydroxide increase or
decrease?
By how many orders of magnitude does the molar concentration of
hydroxide change?
What is the hydronium ion concentration in a solution prepared
by mixing 50.00 mL of 0.10 M HCN with 50.00 mL of 0.030 M NaCN?
Assume that the volumes of the solutions are additive and that Ka =
4.9 x 10^ -10 for HCN.