Pka = -log ka with this formula we can determine nearest value of ph
Pka = - log(2.9*10^-8) = 7.5
Hence it is nerarest value for given ph 7.4 hence option A is correct HClO is best for preparing Buffer solution.
Which of the following substances will be best for preparing a buffer solution with a pH=7.4...
Which of the following acids would be best for preparing a buffer solution with an approximately neutral pH? H2CO3 - Ka = 4.3 x 10-7 H2S - Ka = 9.1 x 10-8 H3C6H5O7 - Ka = 7.1 x 10-4 HNO2 - Ka = 4.6 x 10-4
1. To prepare a buffer solution with a pH of 3.7. Which of the following conjugated pairs would be the best option? A. HSO4- / SO42- Ka = 1.2 x10-2 B. HCN / CN- Ka = 4.0 x 10-10 C. HCHO2 / CHO2- Ka = 1.8 x 10-4 D. H2CO3 / HCO3 Ka = 4.2 x 10-7 E. HClO / ClO- Ka = 2.9 x 10-8
which of the following acid should be used to prepare a buffer with a pH of 9.0? Which of the following acids should be used to prepare a buffer with a pH of 9.0? A. CH3COZH, K, = 1.8 x 10-5 B. H2CO3, K4 = 4.3 x 10-7 C. HF, K, = 6.6 x 10-4 D. HCIO, K, = 3.0 x 10- E.HCN, kg = 6.2 x 10-10
Preparing Buffer Solutions: Calculating the Number of Grams of Conjugate Base Needed Use the table of K values given with this problem to choose the best weak acid to start from for making a buffer that holds the pH of the solution at 8.50. Make your selection so that you maximize the capacity of the buffer. Weak Acid K 1.8 X 10-5 6.5 X 10-5 1.5 X 10-5 You select a 800.0 ml volumetric flask to which you add 8.00...
Which weak acid would be best to use when preparing a buffer solution with a pH of 8.40? an acid with pK, - 3.20 O an acid with pK= 5.10 O an acid with pK= 4.30 O an acid with pK= 9.60 an acid with pK, = 8.38 an acid with pKg = 6.20
Which weak acid would be best to use when preparing a buffer solution with a pH of 8.10? An acid with Ka = 5.0 × 10-10 An acid with Ka = 8.3 × 10-9 An acid with Ka = 1.6 × 10-5 An acid with Ka = 1.0 × 10-4 An acid with Ka = 1.3 × 10-6 An acid with Ka = 1.3 × 10-3
which weak acid would be best to use when preparing a buffer solution with a pH of 4.76? hypobromous acid chloroacetic acid propanoic acid nitrous acid
What is the pH of a buffer solution containing 0.13 M HF and 5.0×10−2 M NaF? What is the pH of a buffer solution containing 1.0×10−2 M HF and 0.16 M NaF? Using the table given below for Ka values, compare the pH of an HF buffer that contains 0.13 MHF and 5.0x10-2 M NaF with another HF buffer that contains 1.0x10-2 MHF and 0.16 M NaF. Ka and K b values for selected weak acids and bases HF Acid...
Prepare a buffer by acid-base reactions. Consider how to prepare a buffer solution with pH = 7.35 (using one of the weak acid/conjugate base systems shown here) by combining 1.00 L of a 0.362-M solution of weak acid with 0.325 M potassium hydroxide. pk Weak Acid HNO2 HCIO HCN Conjugate Base NO2 CIO CN K 4.5 x 10-4 3.5 x 10-8 4.0 x 10-10 3.35 7.46 9.40 How many L of the potassium hydroxide solution would have to be added...
You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, The weak acid solution concentration in this buffer should be 0.250 M and salt is a solid. The following steps walk you through a step by step process of this preparation. a. Choose the proper weak acids for the buffer solution Table 1. Ionization constant Ka for some weak acids Name Hydrofluoric acid Nitrous acid Fulminic acid Acetic acid Hypochlorous acid...