Titration

expressed the concentration of the acetic acid in vinegar where; Molarity = Moles of Acetic Acid / Volume of Vinegar (in L). Mass % = [Mass of Acetic Acid / Mass of Vinegar] x 100. In this experiment, titration will be used to determine the concentration of acetic acid in vinegar. A titration determines the performance of the controlled reaction between a solution of the known concentration (titrant), and a solution of the unknown concentration (analyte). The titrant is an aqueous…

Pre-lab: An endpoint is indicated by some form of indicator at the end of a titration. The equivalence point is when the moles of a standard solution equal the moles of a solution of an unknown concentration. The endpoint of the solution should be a faint pink color. If the color is too dark of a pink that means that it is overly titrated. The independent variable is the amount of base being added to the solution. The dependant variable is the indicator. The constant variable is the acid…

Discussion: In this section the results of the degree of water hardness of the water samples of this group using the two primary methods EDTA and AA will be discussed and analyzed in terms of which sample is exhibiting a high degree of hardness and which sample is considered to have a small water hardness value compared to other samples, and test the hypothesis and prediction of the water samples being tested. According to the results obtained and calculated the water sample that has a high…

necessary to rinse out the burette with sodium hydroxide solution before starting titration, as the concentration of the base can be affected by the water used to clean the burette. At the same time, when cleaning the burette it may not have been washed thoroughly . By rinsing with sodium hydroxide solution, it ensures that the burette is clean and will not affect the results of the experiment. Running a particular titration at least three times is good practice, as it allows for the…

In this experiment the molarity of ammonia is calculated using the process of titration. A chemical reaction occurs when two or more substances change to form different molecules. In each reaction there are ratios between each reactants. Certain amounts of each reactant are needed to fully complete the chemical reaction. Stoichiometry is the relationship between the quantities of the reactants. An acid is a substance that reacts and donates H+ ions. A base is a substance that accepts H+ ions. An…

Therefore, the true concentration of the unknown acid is expected to lie between 0.1064 – 0.1068 M, if the titrations are performed infinite number of times. Out of the three trials, as shown in table 1, trial 1 and 2 both resulted in [unknown] of 0.1067 M reflecting on the precision and accuracy of the titrations. Trial 3 resulted in [unknown] of 0.1065 M, which skewed the average. Determinate error made while pipetting the acid might have resulted in transfer…

in the number of red dots recorded for the pH during the titration with NaOH. This is because in Figure 7, the pH was recorded using ½ mL increments, while Figure 8 used 1 mL increments. Because of this, there were twice as many values in Figure 7 than in Figure 8, which could’ve been the reason for the calculation error. Before the titration, the solution was very acidic after it went through the ion exchange column, but after the titration with NaOH, the solution became basic and had a pH…

observed during this experiment as well. Other factors that can influence a less than 100% reaction included the following: forgetting to add specific reagents when required (i.e, forgetting to add the starch indicator to the product before the titration phase), using the wrong amounts of reagents (i.e. 0.0600g KIO3 instead of 0.6000g KIO3) and not adding the reagents in the specific order given (i.e. adding the starch indicator before adding the ammonium fluoride during the beaker reaction of…

can be used for a variety of things: NaHCO3 is an ingredient in baking soda. Not only are they used for food and health benefits, but bases are also used for manufacturing, production of products, and laundry detergents. The process of titration and back titration also needs to be discussed. The lab teacher assistant presented known concentrations but asked the students to find the unknown solution concentration in the experiment. The element in solution of unknown concentration would have to…

Oxyanions are anions which contain oxygen. Part 5. Determination of % of Fe (II) in a salt redox titration. A titration is a quantitative analysis. From a titration the concentration of a given sample, in this case Fe(II) can be found by using a standard compound of whose concentration is known, in this example: 0.02M of KMnO4. A redox titration involves an oxidation-reduction reaction, hence the name redox. Redox reactions involve the transfer of electrons, i.e. the loss…