Acid Base Experiment Objective: The purpose of acid base laboratory experiment was to determine equivalance points.
Introduction In this experiment you will react the following combinations of strong and weak acids and bases: A solution of one of the bases will slowly drip from a buret into the acid solution at a constant rate.
As base is added to the acid, you should see a gradual change in pH until the solution gets close to the equivalence point. At the equivalence point, equal numbers of moles of acid and base have been added. Near the equivalence point, a rapid change in pH occurs.
Beyond the equivalence point, where more base has been added than acid, you should again observe more gradual changes in pH. A titration curve is normally a plot of pH versus volume of titrant. In this experiment, however, we will monitor and plot pH versus time, and assume that time is proportional to volume of base.
The volume being delivered by the buret per unit time should be nearly constant. One objective of this lab is to observe differences in shapes of titration curves when various strengths of acids and bases are combined. You will also learn about the function and selection of appropriate acid-base indicators in this experiment.
In order to do several other experiments in this lab manual, you need to be able to interpret the shape of a titration curve. Objectives In this experiment, you will Observe differences in shapes of titration curves when various strengths of acids and bases are combined.
Learn about the function and selection of appropriate acid-base indicators.
Learn how to interpret the shape of a titration curve. Sensors and Equipment This experiment features the following Vernier sensors and equipment.Acid–base titration is performed with a phenolphthalein indicator, when it is a strong acid – strong base titration, a bromthymol blue indicator in weak acid – weak base reactions, and a methyl orange indicator for strong acid – weak base reactions.
Los Angeles City College Chemistry 60 EXPERIMENT ACID-BASE REACTIONS AND TITRATION. Introduction: This experiment demonstrates the analytical technique, titration. In a titration, a solution is delivered from a burette until it completely consumes another solution in a.
At the equivalence point in an acid-base titration, moles of base = moles of acid and the solution only contains salt and water. Diagram of equivalence point Acid-base titrations are monitored by the change of pH as titration progresses. 1 Weak Acid Titration v You are encouraged to carefully read the following sections in Tro (2nd ed.) to prepare for this experiment: Sec , pp (Acid/Base Titrations), Sec , pp (Titrations and pH Curves).
This is an example lab report from the CHM WebCT course that has been modified so the cover page is consistent with the Fall CHM format described in your lab manual. Procedure: "Titration of an Acid and a Base", Chem Laboratory Manual, PurdueUniversity, Fall , pp.
25 – The acid-base neutralization reaction being used in today’s titration is given below. HCl + NaOH → NaCl + H 2 O This equation tells that one mole of NaOH will just neutralize one mole of .