A1.000 ml aliquot of a solution containing cu2+ and ni2+ is treated with 25.00 ml of a 0.04590 m edta solution. the solution is then back titrated with 0.02207 m zn2+ solution at a ph of 5. a volume of 21.73 ml of the zn2+ solution was needed to reach the xylenol orange end point. a 2.000 ml aliquot of the cu2+ and ni2+ solution is fed through an ion-exchange column that retains ni2+ . the cu2+ that passed through the column is treated with 25.00 ml of 0.04590 m edta . this solution required 24.47 ml of 0.02207 m zn2+ for back titration. the ni2+ extracted from the column was treated witn 25.00 ml of 0.04590 m edta . how many milliliters of 0.02207 m zn2+ is required for the back titration of the ni2+ solution?

Two things that biomedical has invented or innvated

2. how is heavy water different from normal water

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?