Starch turns a blue-black color in the presence of iodine. julian decides to use this information to test the permeability of some dialysis tubing. julian fills the tubing with a starch solution and places it in a beaker of iodine and water. after two hours, the starch solution in the dialysis tubing turns blue-black. the iodine solution remains the same color (it doesn't change colors). what do julian's results show about the permeability of the tubing?

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?

The minerals found in bones are deposited by living cells called

Which metal exist in liquid state and can be cut with knife ?