Part A Which of the following buffer systems would be the best choice to create a...
32. Which buffer system is the best choice to create a buffer with pH =9.00? For the best system, calculate the ratio of the masses of the buffer components required to make the butffer HNO/KNO HF/KF NH3/NH CI HСО /КСЮ
I finished Part A. I just need Part B. All the information needed should be there. Review I Constants I Periodic Table Part A Which of the following buffer systems would be the best choice to create a buffer with pH 9.10? HF/KF Ο ΗΝΟ/KN HNO2/KNO2 NH3/NH4 Cl о HСО/КCIO HCIO/KCIO Previous Answers Submit Correct The best buffer will be the one whose weak acid component has a pKa closest to the desired pH of the buffer. Since the pKa...
Question 6 5 pts Which buffer system is the best choice to make a buffer at pH 3.15? HC,H502/C7H502 O HNO2/HNO2 HCIO/CIO HC2H302/C2H302 HOCI/OCI- HNO/NO,
Which of the following combinations would be best to buffer an aqueous solution at a pH of 9.02 Use the References to access important values if needed for this question HNO2 and NO27, Kg = 4.5E-4 H3PO4 and H2PO4, Ka1 = 7.5E-3 H2P04 and HPO42-, K42 = 6.2E-8 CH2COH and CH3COO", KA = 1.8E-5 NHA and NH3, K= 5.7E-10 Submit Answer I question attempt remaining Autosaved at 10.16A
(YES/NO) (ADDED ACID/ADDED BASE) A buffer solution that is 0.322 M in HNO2 and 0.322 M in NaNO, has a pH of 3.35. Addition of which of the following would increase the capacity of the buffer for added OH"? (Select all that apply.) OHNO2 pure water O both HNO, and NaNO2 NaNO2 Onone of the above Use the References to access important values if needed for this question. The PK, value for HNO2 is 3.35. Would a buffer prepared from...
Question 2 2 pts Out of the potential unknowns in this experiment, which one would be the best choice to create a buffer with a pH of 7.0? O Phenol O Hypobromous acid O Sodium bisulfite O Sodium bisulfate O Bicarbonate ion O Potassium hydrogen phthalate O Formic acid O Ascorbic acid
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
A reaction occurs at a pH of approximately 5. Which of the following buffer systems would be best used to make a solution with this pH? Select one: a. [CH3COOH] :[CH3COO-] b. [H2PO4-]: [HPO42-] c. [H2CO3] :[HCO3-] d. none of these.
Which of the following compounds would make the best buffer at pH 7.5? Acetic acid, pKa= 4.76 N-tris(hydroxymethyl) methylglycine (Tricine), pKa = 8.15 N-2-hydroxyethylpiperazine-N’-ethansulfonic acid, pKa2= 7.6 Glycine, pKa2= 9.9 Tris(hydroxymethyl)aminomethane (Tris), pKa = 8.3 I believe 3 is the correct answer and therefore I am trying to answer the below question with this information. Using the answer that you selected from question 1 above: a. Explain how you would make the buffer starting with 1M HA and 1M A-...
Which of the following substances will be best for preparing a buffer solution with a pH=7.4 Acid HCIO 2.9 x 10-8 H2CO3 4.4 x 10-7 HNO2 7.4 x 10-4 NH4 5.8 x 10-10 HCIO HNO2 NH4 O H₂CO₃