2.Measure 50ml of HCL in a 250 ml measuring cylinder and pour it into a flask, then measure 50ml of HCL again and pour it into the second flask. 3.Measure the 50ml of KOH in a measuring cylinder. Repeat it again in another measuring cylinder. 4.Attach both of the burette clamps to both of the burette stands and clamp the burette at a certain level so that it can fit a flask underneath. 5.Then, place a funnel on top of each burette.
6.Place a flask underneath both burettes.
7.Tighten both the burettes at a same level so that the same amount of liquid is added at a consistent amount of time. 8.Add two drops of phenolphthalein to each flask using a pipette. 9.When ready, pour one of the measuring cylinders with KOH (100%) through one of the set up apparatus so that the liquid goes through the funnel, through the burette and into the flask. Time the neutralization with a stopwatch as soon as the liquid drips its first drop into the flask and stop the stopwatch after it has experienced turning from transparent (acid) to pink (base), then to transparent again, as when it reaches neutralization. 10.Repeat step 9 for the second set-up apparatus aside for the second trial and reuse the first apparatus after cleanup for the third trial. 11.The step repeats from step 2 to 8. Next, according to the chart below, for the next concentration, measure 20ml of water in a 500ml beaker and add them to the measured 80ml KOH in a measuring cylinder for the 80% concentration before adding the KOH to the funnel (burette). Then, repeat step 9 and 10. 12.Repeat steps 2 to 11, but because the concentration of the KOH varies, so according to the chart below, the experiment requires further adjustment to the amount of water added to a certain amount of base for each change in concentration. Change the amount of water added to the base as the experiment goes.