2. a) What is the percent ionization (%) of hypochlorous acid in an aquesous solution of 0.135 M HOCl at 25ºC? Calculate the Ca/Ka value first. Report the value to 3 significant figures. (3 decimal palces, fill in the number ONLY!)
b)
What is the pH of an aqueous solution of 0.019 M hydrofluoric acid, HF, at 25ºC? Report answer to 2 decimal places, fill in the number ONLY!
2. a) What is the percent ionization (%) of hypochlorous acid in an aquesous solution of...
1)Calculate the percent ionization of a 0.330 M solution of hypochlorous acid. % Ionization = % 2)In the laboratory a student measures the percent ionization of a 0.405 M solution of hydrofluoric acid to be 4.35 %. Calculate value of Ka from this experimental data. Ka = 3)The hydroxide ion concentration of an aqueous solution of 0.405 M nitrous acid is [OH-] = M. 4)The pOH of an aqueous solution of 0.405 M hydrofluoric acid is
46. What is the percent ionization of a 0.491 M aqueous solution of carbonic acid? Ka1= 4.2x10^-7; Ka2= 4.8x10^-11 47. What is the percent ionization of a 0.356 M aqueous solution of hydrosulfuric acid? Ka1= 9.5x10^-8; Ka2= 1x10^-19 48. What is the pH of a 0.387 M aqueous solution of acetic acid? Ka (CH3COOH) = 1.8x10^-5 49. What is the pH of a 0.0398 M aqueous solution of benzoic acid? Ka (C6H5COOH) = 6.5x10^-5 50. What is the pH of...
Part A A 0.150 M weak acid solution has a pH of 2.97. Find Ka for the acid. Part B Find the percent ionization of a 0.195 M HC2H3O2 solution. (The value of Ka for HC2H3O2 is 1.8×10−5.) Part C Find the pH of a 0.0191 M solution of hypochlorous acid. (The value of Ka for hypochlorous acid is 2.9×10−8.) Part D Find the pH of a 0.014 M solution of HF. (The value of Ka for HF is 3.5×10−4.) Part...
5.) Calculate the concentrations of all the species and the pH
in 0.25 M hypochlorous acid, HOCL. For HOCL, Ka=3.5x10^-8
6.) the pH of a 0.115M solution of chloroacetic acid,
CICH2COOH, is measured to be 1.85. Calculate the Ka for this
monoprotic acid
Calculate the concentrations of all the species and the pH in 0.25 M hypochlorous acid, HOCI. For HOC, Ka :3.5 x 108. .) The pH of a 0.115M solution of chloroacetic acid, CICH2COOH, is measured to be...
Calculate the pH of a solution that is prepared by dissolving 0.740 mol of hypochlorous acid (HCIO, Ka = 3.00x10-8) and 0.254 mol of hydrofluoric acid (HF, K, = 6.60*10-4) in water and diluting to 4.50 L. Also, calculate the equilibrium concentrations of HCIO, CIO-, HF, and F. Do not make an approximation unless the initial acid concentration is greater than 1000 ~ Kg. (Hint: The pH will be determined by the stronger acid of this pair.) pH = [HCIO]...
Please answer both questions.
24. Calculate the percent ionization for a 0.0240 M hypochlorous acid solution. The ka for hypochlorous acid is 3.4x10-8 27. A chemist wants to make a pH 7.29 buffer. Two chemical combinations are available: hypochlororous acid (HCIO, K, = 3.5x10%) with sodium hypochlorite, or sodium dihydrogen phosphate (NaH2PO4, K. = 6.2x10") with sodium hydrogen phosphate. Which chemical combination is best for the buffer? What [base]/(acid) ratio should be used?
a.The pH of an aqueous solution of 0.427 M hypochlorous acid is---- b.The pH of an aqueous solution of 0.426 M pyridine (a weak base with the formula C5H5N) is----- c.A solution contains 0.404 M sodium fluoride and 0.286 M hydrofluoric acid. The pH of this solution is--------
1. Hypochlorous acid has a pKa = 7.46 (a) Determine the pH and percent ionization of 0.25M hypochlorous acid (b) Consider a 0.25 M hypochlorous acid / 0.35 M sodium hypochlorite buffer. What is the pH of this buffer. (c) What is the pH of a solution made by mixing 15.0 mL of 0.1 M NaOH with 135 mL of the buffer.
The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF?
What is the percent ionization in a 0.00350 M solution of base that has a pH of 8.51? Report your answer in the correct number of significant figures. Report the percentage, not the percentage as a decimal value. For example, if you calculate 50.0 %, report 50.0, not 0.500.