Buffers Resists a Change in pH Engineering General Chemistry Lab 6 PPT

Buffers Resists a Change in pH Engineering General Chemistry Lab 6 PPT

 

Hi, Can you do the report for this experiment? and I upload the all file.
Completed individually.  In your discussion you should make a conclusion and then explain how your experimental results and observations support your conclusion.  The points below should help you identify the information you have available from this experiment to support your conclusion.  Submit completed lab report by due date.  Students should be able to make a claim about which buffer system is most effective and support this claim with both theoretical calculations and experimental evidence.  Be sure to include the following:
Find one instance of the importance of buffers to life or to the environment and write a SHORT paragraph about the chemistry, referencing all sources.
Based upon the introduction in your lab manual, what are you trying to find with your experiment?
Based upon the purpose of your experiment, what claim can you make using your experimental evidence?
Table(s) of your results. Include expected, experimental, and % error as appropriate.
Discussion of your results.

Which buffer had the highest capacity for added acid? Is this consistent with your expected results? Use a graph and a table of your experimental results to support your conclusion.
Which buffer had the highest capacity for added base? Is this consistent with your expected results? Use a graph and a table of your experimental results to support your conclusion.


Uncertainty and Error in measurements.

Identify possible sources of uncertainty and error in your measurements
Comment on the relevance for each possible source of error. Based on the magnitude and direction of the error source and evidence from your laboratory notebook, determine if each source of error is relevant for your results.


 




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Introduction and Procedure for Experiment 6 Experiment 6: Buffers Question: What is a buffer solution? Goals 1. Students understand how a buffer works. 2. Students learn how to prepare an effective buffer solution. 3. Students discover the concept of buffer capacity. Objectives 1. Students gain additional experience measuring pH. 2. Students prepare buffer solutions and test the effect of adding acid and base. Introduction Buffers are solutions that resist a change in pH when small quantities of acids or bases are added. In this experiment, you will examine potential buffer systems and determine their effectiveness. Students should be able to make a claim about which buffer system is most effective and support this claim with both theoretical calculations and experimental evidence. Equipment 1. 2. 3. 4. pH probe Universal indicator



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