## Reflection: High Quality Task S'more Stoichiometry - Section 4: Evaluate

One of the biggest issues I have with students is making sure that they understand what they are doing when they perform calculations.

With this lab when students calculate their theoretical yield and percent yield I feel that not every student knows how they got their answers.  As students were doing the lab I realized that I should make sure that students show their work in terms of how they perform these calculations.  Because of this I have revised the lab for next time, so that I tell students explicitly to SHOW YOUR WORK when doing these two calculations.  This revised s'mores lab is the revised version.

High Quality Task: Lab Changes- Improvement of Instructions

# S'more Stoichiometry

Unit 4: Unit 5: Stoichiometry, Chemical Reactions, and First Semester Review
Lesson 2 of 7

## Big Idea: In chemical reactions a limiting recant causes a reaction to stop while an excess reactant is leftover. Additionally one can calculate percent yield using the experimental value from performing a lab and the theoretical value.

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Standards:
Subject(s):
Science, Chemistry, stoichiometry, balancing chemical equations, Chemical Reactions and Balancing, limiting reactant, excess reactant, percent yield
50 minutes

### Rachel Meisner

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