Prepare 6 solutions and test each solution for its buffer capacity.
Most of the solutions will be prepared through direct dilution and serial dilution methods. The target concentrations may be given in units of molarity.
Molarity = moles/volum(L)
The molarity equation can be re-arranged to solve for moles of solute by taking the product of molarity and volume in liters:
moles = MV
During a dilution, the moles of a substance will not change; however, concentration will change because volume is increased during the dilution. The dilution
equation has been used in many labs so far and can be used to solve for the volume of stock solution if the concentrations of the stock solution, the target
concentration and the total volume of the dilute solution are known.
M stock V stock = M dilute V dilute
Each solution that is prepared will be tested for its buffer capacity. Recall that buffers, resist pH change following the addition of a strong acid or a
strong base.
Part 1: Preparing your stock solutions
Part 2: Prepare a buffer at pH = 9.75