y now, you studied Chapters 13 and 14 in your textbook that describe acid-base reactions and used Labster simulation on how to perform and analyze data in titration experiment. It is time to share what you have learned!
The goal of this Signature Assignment is to show that you can compute properties of solutions and analyze and interpret data. You will create a PowerPoint presentation that shows the process of going through an acid/base titration like you would if you were in a physical lab.
Your lab assignment presentation involves putting together a PowerPoint presentation to show other students how to perform titration. In other words, your presentation can be used to show other students (next term) how they can perform a titration by following your instructions and calculations.
To do this presentation (minimum 6 slides, in PowerPoint format), we are providing you with an acid, acetic acid (HC2H3O2) and the base (NaOH), and you will use phenolphthalein as an indicator.
You will create a mock titration experiment and use given hypothetical data (volume of vinegar, Molarity of NaOH and volume of NaOH for three trials) to solve the titration calculations (consult your instructor if you need further clarification). At the end of your presentation, you will calculate (1) the unknown concentration of the acetic acid (Molarity) and (2) the % mass/vol of the Vinegar solution.
Here is a video that illustrates the titration process and necessary calculations:
Titration Experiment & Calculate the Molarity of Acetic Acid in Vinegar (Links to an external site.)
Here is the hypothetical experimental data that was obtained after your hypothetical titration. Use the data provided for your calculations.
Your instructor will provide the data for steps 1 and 2. Students must complete Steps 3-10 for their presentation results.
Concentration of NaOH (from the bottle) _____________
Volume of vinegar used (that you poured in the flask) _____________
STEP Trial 1 Trial 2 Trial 3
(1) Initial NaOH level in buret
(2) Final NaOH level in buret
(3) Volume (mL) of NaOH used
Your presentation must consist of more than merely a series of bullet points to earn full credit
Remember, you want to teach your peers how to do titration experiment and calculations. Your experiment should be reproduced with ease.
Use the Notes section for each slide to fully explain your answers, if necessary.
TurnItIn will be used, so paraphrase where necessary to avoid plagiarizing.
Grading: See rubric for specific grading criteria (in My Grades). You will be graded based on the rubric; therefore, carefully read it before you start creating your assignment. Remember it is 100 points, so your work must show quality and effort.
To include in your PPT presentation:
Purpose of a titration, what is titration and why do we perform a titration?
Include your thoughts on why understanding acid/base titration is important to your future career, and how you will use this concept as you complete your degree (at least 5 sentences with examples). Note: this section is worth 20 points and should provide insightful discussion).
Instrumentation – what are the instruments, glassware used when performing a titration.
Chemicals and Procedures. What chemicals are needed? List and explain the procedures for this experiment.
Observations and expectations – List the observations and write your expectations. This might include color change and when the equivalence point (endpoint) might be reached.
Calculations and Results. Show all your step-by-step calculations and write your results for the Molarity of the acetic and the % of the acetic acid.
Your results must include the following step-by-step calculations:
STEP Description Students must do
(4) Average volume of NaOH used (mL) Provide calculations
(5) Average volume of NaOH used (L) Provide calculations
(6) Moles of NaOH used in titration Provide calculations
(7) Moles of HC2H3O2 neutralized by NaOH Provide calculations
(8) Molarity of HC2H3O2 Provide calculations
(9) Grams of HC2H3O2 Provide calculations
(10) Percent (m/v) of HC2H3O2 in vinegar Provide calculations
HINT: Remember sig figs in calculations to properly express your final answers (molarity and % mass):
addition/subtraction -> fewest decimals
multiplication/division -> fewest sig figs
Provide a reference page (in proper APA format)
For help and videos:
Your instructor will provide guidance and examples for complete titration calculations. Review supplemental videos:
Setting up and Performing a Titration (Links to an external site.)
Molarity Made Easy: How to Calculate Molarity and Make Solutions (Links to an external site.)
Molarity – Chemistry Tutorial (Links to an external site.)
Molarity Practice Problems (Links to an external site.)
Molarity Practice Problems (Part 2) (Links to an external site.)
Mass-Volume Percent: How to Solve Concentration Questions %(m/v) (Links to an external site.)
Read chapter 13 and 14 for review solutions and acid-base reactions
This assignment should be in current APA Style with both a title slide and a reference list that includes all the sources used. At least two scholarly sources should be used (your textbook can be one of the sources). For proper referencing of your resources consult Library on Canvas, APA 7th Edition Guide.