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QUESTION 11 Which of the following acid/base conjugate pairs could you use to make a buffer...
QUESTION 11 Which of the following acid/base conjugate pairs could you use to make a buffer solution with a pH of 2.10? The K for the acids are given in parentheses. Hydrogen phosphate/phosphate (Kg = 4.2 x 10-13) Ammonium/ammonia (K- 5.8 10-10) Benzoic acid / benzoate (K, -6.3 x 10-5) Chlorous acid / chlorite (K = 1.1x102) Hydrofluoric acid / fluoride (K, = 6.6 x 10-4)
QUESTION 11 Which of the following acid/base conjugate pairs could you use to make a buffer solution with a pH of 3.987 The K, for the acids are given in parentheses. Hydrogen phosphate / phosphate (K, -4.2 x 10-13) Ammonium / ammonia (K, - 5.8 x 10-19 Hydrofluoric acid / fluoride (K. = 6.6 x 10-4) Benzoic acid / benzoate (K, -6.3 * 10-5) Chlorous acid / chlorite (K, -1.1 x 104
QUESTION 11 Which of the following acid/base conjugate pairs could you use to make a buffer solution with a pH of 9.877 The K, for the acids are given in parentheses. Hydrofluoric acid / fluoride (K. = 6.6 x 104) Benzoic acid / benzoate (K, -6.3 x 10-5) Chlorous acid / chlorite (K, - 1.1*102) Hydrogen phosphate/phosphate (K, -4.2 x 10-13) Ammonium / ammonia (K = 5.8 x 10-19
Assuming 0.1 M concentrations, arrange the following acids in order of increasing pH. benzoic acid, HC7H5O2, Ka ≡ 6.3 × 10−5 chlorous acid, HClO2, Ka ≡ 1.1 × 10−2 formic acid, HCHO2, Ka ≡ 1.8 × 10−4 hydrofluoric acid, HF, Ka ≡ 6.8 × 10−4
Discussions Question 11 NetTutor 1 pts Courses Which of the following acids has the weakest conjugate base? Honorlock Calendar Grades Chat hydrocyanic acid, Ka 4.0 * 10 10 Inbox acetic acid, Ka 1.8 x 105 nitrous acid, Ka4.5 x 104 Studio dihydrogen phosphate ion, Ka-6.2 x 10 © Help benzoic acid, Ka-6.3 x 105
A buffer may be prepared by mixing a weak acid with a roughly equivalent amount of strong base. Which of the acids below is best for the preparation of a buffer with a pH of 4.00? hr t MOaq sproe oup jo p Eq uons Jo unoure juaeAmba Auano1e q proe ean e Sunxu Aq paedaad oq eu an y 00 Jo Hd e q agnqeJo uonEJedaud dihydrogen phosphate ion, H2PO4, K 6.2x 10- sulfiurous acid, H,SO;; K, 1.7 x...
Design a buffer that has a pH of 5.85 using one of the weak base/conjugate acid systems shown below. Weak Base Kb pka 10.62 CH3NH2 C6H1503N C3H5N 4.2x10-4 5.9x10-7 1.5*10-9 Conjugate Acid CH3NH2+ CGH1503NH+ CsH5NH ка 2.4x10-11 1.7*10-8 6.7x10-6 7.77 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide...
QUESTION #1 What is the pH of a buffer by mixing 1.00L of 0.020M benzoic acid, HC,H,O2, with 3.00L of 0.060M sodium benzoate, NaC HO2? Ka for benzoic acid is 6.3 x 10-5. Write the reaction of the buffer when acid is added to the system. Write the reaction of the buffer when base is added to the system. QUESTION #1 What is the pH of a buffer by mixing 1.00L of 0.020M benzoic acid, HC,H,O2, with 3.00L of 0.060M...
Which of the following weak acids and is salt could you use to make a buffer solution with a pH of 3.00? acetic acid/sodium acetate Ka - 1.8 x 10-5 hydrocyanic acid/sodium cyanide Ka - 4.9 x 10-10 phosphoric acid/sodium dihydrogen phosphate Ka - 7.5 x 10-3 Carbonic acid/sodium bicarbonate Ka = 4.3 x 10?
pKa Conjugate base Acid formula Conjugate base name Acid name F3CCOOH 0.20 F3ccoo trifluoroacetic acid trifluoroacetate ion 13.80 Cl3CCOOH 13.34 0.66 Cl3CCOO trichloroacetic acid trichloroacetate ion HOOCCOOH 1.23 HOOCCOO oxalic acid hydrogen oxalate ion 12.77 Cl2HCCOOH 12.70 dichloroacetic acid 1.30 Cl2HCCOO dichloroacetate ion H2SO3 12.23 1.77 HSO3 sulfurous acid hydrogen sulfite ion 1.92SO42- HSO4 hydrogen sulfate ion sulfate ion 12.08 HCIO2 1.95 CI02 chlorous acid chlorite ion 2.12 H2PO.4 phosphoric acid H3PO dihydrogen phosphate ion 11.88 CIH2CCOOH 2.87 CIH2CCOO 11.13...