Order Instructions/Description
Please answer the following questions, showing all work and explaining all answers. I am grading this based on the work and explanations you provide; merely giving me an answer will not suffice. 1.) What is your birthdate, in MM/DD/YY format? (No explanation necessary.) 2.) What conjugate acid/base pair (from those options below) will work best for your buffer? Explain. 3.) What is the necessary mass of conjugate base (assume a sodium cation if necessary) that must be added to a 1.0 M solution of your acid? (Show calculations.) 4.) Describe the steps that would be taken to physically create your buffer. (Check the textbook for examples.) 5.) What would the pH of your buffer be upon adding 0.005 moles of HCl? What would it be after the addition of 0.005 moles of NaOH? (Show calculations.) You must select an acid/base pair from the following table. Although other pairs exist that may be a better fit, you are limiting to selecting from the following. Acid (Formula) Base (Formula) pKa EDTA (C10H16N2O8) NaC10H15N2O8 1.78 Hydrofluoric acid (HF) NaF 3.45 Malonic acid (C3H4O4) NaC3H3O4 5.69 Hydrogen sulfide (H2S) NaHS 7.04 Hydrocyanic acid (HCN) NaCN 9.31 Hydrogen peroxide (H2O2) NaHO2 11.62