Chemistry Homework Help

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Weak Acids

Q. Determine the concentration of a solution of ammonium chloride (NH4Cl) that has a pH 5.33 at 25 deg C.

Solved • May 1, 2020

Weak Acids

Q. A burette was filled with 50.00 ml of NaOH ans a titration was performed against an unknown acid dissolved in 100.00 ml of water which also contained 4 drops of phenolphthalein. Molarity of NaOH solution = 0.0925 M Initial volume in burette = 0.03 ml Volume used to reach the endpoint= 23.48 ml Grams of unknown acid used = 0.224 g pKa of the acid = 4.15 What was the equilibrium constant for the acid?

Solved • May 1, 2020

Weak Acids

Q. The sodium salt of propanoic acid, NaCH3CH2CO2, is used as an antifungal agent by veterinarians. Calculate the equilibrium concentrations of H3O+, and OH-, and the pH, for a solution of 0.60 M NaCH3CH2CO2.

Solved • Apr 28, 2020

Weak Acids

Q. A 0.35 M solution of a weak monoprotic acid has a percent ionization of 1.4%. What is Ka for this acid.

Solved • Apr 27, 2020

Weak Acids

Q. What is the pH of a 2.50 M acetic acid solution? Ka= 1.8 x 10^-5

Solved • Apr 26, 2020

Weak Acids

Q. Determine the percent ionization of the following solutions of phenol at 25°C: a) 0.717 M, b) 0.180 M, c) 1.26x10^-6 M

Solved • Apr 24, 2020

Weak Acids

Q. In which of the following solutions will [H3O+] be approximately equal to [CH3COO−] :

Solved • Apr 19, 2020