When testing for starch in a leaf the leaf undergoes various procedure before starch is added. Explain the importance of a) Boiling the leaf in water ,methylated spirit and rising. b) Placing a potted plant in the sun for 5hours c) State the expected observation

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?