Grab binders, handouts, returned work & calculators, begin the Do Now 5/9 DO NOW 1. You have 10 min to complete the “Aspirin Lab Post Assessment” you grabbed.

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Grab binders, handouts, returned work & calculators, begin the Do Now 5/9 DO NOW 1. You have 10 min to complete the “Aspirin Lab Post Assessment” you grabbed off of the door. 2. You have 5 more min to prepare for today’s quiz on the following topics: - Law of Conservation of Mass - Counting Atoms - The Mole - Balancing Simple Reactions - Counting Atoms - Calculating Molar Mass * Set out 1 sheet of blank paper, your periodic table, and calculator. Clear everything else off of your desk

Quiz 2 40 min to complete (we will track immediately after) DO NOT write on the quiz, write answers on separate sheet of paper When finished turn in the quiz upfront, grab a colored pencil & calculator, and sit silently. – Things to Do: HW 3 & HW 4 Lab 2: Biodegradable Soap Lab Report Organize Binder for Binder Check #1 Other course work

Lab 3: Synthesizing Aspirin Question: Are brand name commercial prescription drugs better than generic or homemade prescription drugs? Directions: - Complete & submit Lab 2 (Introduction, Pre-Lab, & Hypothesis) - Draft Lab 3 Introduction, Pre-Lab Questions, & Hypothesis

Theoretical Yield C 7 H 6 O 3 (s) + C 4 H 6 O 3 (aq)  C 9 H 8 O 4 (s) + C 2 H 4 O 2 (aq) How much did we start with? Molar Masses? Mole Ratio? Lets climb up & down the mole hill…

Percent Yield & Percent Error Percent Yield: How much product you obtained Percent yield = (actual yield ÷ theoretical yield) x 100% Percent Error: How accurate you were Percent error = | actual yield – theoretical yield | x 100 % theoretical yield

Conclusion Restate the purpose Explain your hypothesis (accepted or rejected?) Results – use your results to answer the purpose! Unknown – what were some unexpected errors that occurred? If your percent yield was not 100%, then why? New – what can you change if you were to perform this lab again?