For example, in trial 1, I used These errors were avoidable. Titration lab discussion major factor that affected the result of this experiment was to strength of the sodium and sodium hydroxide. These uncertainties can be reduced by using more accurate equipments, for example a more accurate mass balance.
Analysis The purpose of this investigation was to determine to molar concentration of acetic acid in vinegar. Data tables are always a good idea!
This section should be written assuming the reader is not familiar with the project and should contain the following: This means that due to systematic error, my accuracy has fallen by 9.
However, the exact value of the amount of acetic acid present in a mL sample of vinegar is 0.
This flaw was due to allowing excess sodium hydroxide to flow, causing the KHP solution to become pinker than it should have. Also, at each point before the equivalence point, only strong acid, water, and the immeasurably weak conjugate base of the strong acid are present.
The uncertainty of 2. During the experiment, the sodium and sodium hydroxide were both left open to interact with the environment for some time.
Calculations can be done in steps or in a single step, as long as your TA can easily follow what you are doing! What do your results mean? The percent error that has resulted is: The theoretical value of the Sodium Hydroxide that was expected to be used was 9.
The difference between these sets of data indicates that the systematic error of allowing the KHP solution to become too pale resulted in strange fluctuations.
Do your results make sense with respect to the theory? This experiment showed that the concentration of acetic acid is 0. Therefore when water was added, the amount of HCl did not change and thus the amount of NaOH needed to completely react with the HCl did not change with the addition of water.
In other words, ask and answer this question for each step in the procedure: When you are writing the Discussion section, consider including the following 3 points:Results and discussion The experiment involves two steps: (i) Standardization of sodium hydroxide (NaOH) solution using potassium hydrogen phtalate (KHP) solution, and (ii) titration of an.
Discussion exp 1 1. Discussion:Titration is a technique for determining either the concentration of a solution of unknownmolarity or the number of moles of a substance in a given sample. Titration of Vinegar Lab Answers; Introduction. Image 1: Setup of the apparatus during the titration. Once standardized, use the sodium hydroxide solution to titrate three 10 mL samples of the vinegar.
Clean up you lab solution. Observations. Titration with sodium hydroxide and oxalic acid. The titration lab also involved indicators. Indicators are substances which undergoes a color change in the pH interval of the equivalence point, allowing physical observation of pH change.
Most indicators are weak acids, so protons shift from acid to conjugate base. The discussion section of the lab report is where the results are interpreted, especially as they relate to the goals stated in the Introduction. It is also a place where experimental anomalies, errors, or other surprising results can be discussed.
Like any titration, neutralization titrations depend on a chemical reaction between the unknown solution and a standard reagent. The point of chemical equivalence is indicated by a chemical indicator or an instrumental measurement.
When the color chang 3/5(2).Download