Determine [H30+] of a 0.210 M solution of formic acid (Ka = 1.8 × 10-4).

hello i need help with part a and b. Previous solutions provided were wrong. Handwritten solutions are prefered. 1a) Calculate the acetate ion concentration in a solution prepared by dissolving 9.90×10-3 mol of HCl(g) in 1.00 L of 1.50 M aqueous acetic acid (Ka = 1.80×10-5). 1b) Calculate the pH of the above solution.

Q1) Calculate the KbKb value for CH3COO−CH3COO−. Q2) Calculate the KbKb value for CN−CN−. Round two sig figs plz Q3) A 0.20 M solution of a salt NaA has pH=9.47pH=9.47. What is the value of Ka for the parent acid HA?

O ADVANCED MATERIAL 0/5 Calculating the pH of a buffer A solution is prepared at 25 °C that is initially 0.49 M in diethylamine ((C,H5),NH), a weak base with K = 1.3 × 10 °, and 0.36M in diethylammonium bromide ((C,H5), NH,Br). Calculate the pH of the solution. Round your answer to 2 decimal places. pH =

5. Calculate the percent ionization of propionic acid (C₂H5COOH) in a solution of 0.250 M propionic acid. Ka = 1.3 × 10-5 for propionic acid. You may use the "small x" approximation.

Assume H2SO4 is a completely strong acid, and forms 2 H+ and an SO4-2 when dissolved in water.   A solution which contains 0.040 M H2SO4 will have  [H3O+] = ? (include 2 sig figs and a unit!) [OH-1] = ?    (include 2 sig figs and a unit!) pH = [A] and pOH = [B] Select the answers that apply.     0.080 M     1.2 x 10-13 M     1.10     12.9

A 0.200 M weak base has a pH of 9.96. What is the K, value of this base? K = 4.715e-8

11. 0.0100 M solution of HCN has pH=5.7. What is K₂ value and pką?

Calculate the [H3O+] of a solution of 0.1956 M KCN if Ka = 4.900e-10 for HCN?

Given that the Ka of HNO2 is 6.0 x 10^-4, calculate a) the Kb of the NO2- ion b) using the Kb find [OH-] in 0.100 M NaNO2