An acetic acid buffer solution is required to have a ph of 5.27. you have a solution that contains 0.01 mol of acetic acid. what molarity of sodium acetate will you need to add to the solution? the pka of acetic acid is 4.74. show all calculations in your answer.
in this experiment, you will make an acetic acid buffer by adding sodium hydroxide (naoh) to commercial vinegar. commercial vinegar is usually comprised of 5% acetic acid by volume. the sodium hydroxide will react with the acetic acid to form sodium acetate (ch₃coona). see equation below.
ch₃cooh(aq) + naoh(aq) > ch₃coona(aq) + h2o(l)

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?