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The goal of your 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 on 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 PPT), we are giving you the type of acid, acetic acid, the type of base, NaOH to be used, and you will use phenolphthalein as the indicator. You will create a mock titration experiment and use your own hypothetical data (volume of vinegar, Molarity of NaOH and volume of NaOH for three trials) to solve the titration calculations (consult me, if you are in doubt). At the end of your presentation, you will show the unknown concentration of the acetic acid (Molarity) and will also show the % mass/vol of the Vinegar solution (as you have done for Week 7 Lab Manual Assignment).

• 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 the calculations. Your experiment should be reproduced it 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:

Part 1

• Title page

• 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 and examples).

• 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 (refer to Lab Manual pages 227-230)

◦ Your base concentration must have 3 decimals and your acid volume must have at least 1 decimal. Buret readings will give you two decimals.

• Observations and expectations – List the observations and write your expectations. This might include color change and when the equivalence point (endpoint) might be reached.

Part 2

• Calculations and Results. Show all your step-by-step calculations and write your results, the Molarity of the acetic and the % of the acetic acid.

◦ HINT: use Part A on page 233 as a template

◦ Remember sig figs in calculations to properly express your final answers (molarity and % mass):

▪ addition/subtraction -> fewest decimals

▪ multiplication/division -> fewest sig figs

• Reference page (in proper APA format)

For help and videos:

• Your instructor will provide guidance and examples for completing calculations for titration.

▪ Helpful links to study from week 7

 

This assignment should be in current APA Style with both a title slide and a reference list that includes all of 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.

Helpful materials and HINTS:

• Your chosen concentration of the base must have three decimals (e.g 0.100 M or 0.150 M or 0.200M, etc). Hint: sig figs for your future calculations

• Use graphics, diagrams, charts, tables and other visuals to illustrate your point and to make it more interactive.

• Your slides must be clear, concise, not too busy, and readable.

• Note: If you will use 50-mL burette for your procedure, you cannot use the volume of more than 50 mL of base for titration.

• You might add a picture of buret (figure or hand-drawn) that clearly shows the intervals. Remember to properly express your volume measurements with proper decimals (review week 1 and week 3 lab manual assignments).

• You must demonstrate your knowledge and understanding of the titration concept and show complete and clear calculations with proper units and significant figures.

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