CHEM 30AL Spring 2003 Aspirin Experiment Part 2 There is NO Pre lab Report for this experiment There will be an inlab quiz instead The quiz will include all the concepts from experiment 10 not just part 2 of the experiment Review the lecture guides any assigned readings refer to the lab schedule and the study questions see below for the quiz Practice problems 1 3 under week 2 on p 91 before the quiz The quiz is CLOSED book and notes You may use a calculator during the quiz You will have a maximum of 30 minutes to complete the quiz The quiz will start 5 minutes after the start of the lab section You will NOT receive extra time if you show up late to the lab You must take the quiz in the lab section in which you are officially enrolled There is no make up if you miss the quiz CHEM 30AL Spring 2003 Postlab Report Guidelines for Aspirin Experiment Part 2 This is an INDIVIDUAL report Post lab report MUST be written inside your LAB NOTEBOOK except for graphs A Abstract summarize results and outline the lab technique that you used in the lab to purify and analyze the final product B Titration Data see p 94 under Analyses Orderly record of data Data tables should have proper titles labels C Data Analysis MUST SHOW ALL WORK FOR FULL CREDIT Calculate the recrystallized yield Calculate the average purity from all the trials of your titrations Calculate the Rf values for the recrystallized aspirin product salicylic acid and the pure aspirin for the TLC experiment D Error Analysis MUST SHOW ALL WORK FOR FULL CREDIT NOTE Refer to chemistry 20L lecture notes on errors propagation or your post lab for part 2 of the iron oxalate lab Calculate the inherent error in purity for ONE of your trials You Must identify each term in the error analysis E Conclusions summarize results again Based on the result of TLC comment on the purity of the aspirin product Based on the value of the experimental melting point as compare to literature value what can you conclude in terms of the purity of the product Explain If your purity is greater than 100 explain why If your purity is less than 50 explain why
View Full Document
Unlocking...