Introducing the 2nd edition of this popular lab activity! Thanks for the support. The second addition uses a new font and includes some revised questions and new graphics.
Stoichiometry calculations are a basic component of any chemistry laboratory experiment. Determining experimental and percentage yield based on experimental data is very common as well. However, are you a science teacher who, like me, has found their class-time reduced while your curriculum has been expanded? Do you find that some labs confuse your student more than clarify a scientific principle due to factor beyond the scope of the subject or level? You agree with the fundamental principles of micro-labs, (less time, cost and environmental impact), but find it difficult to obtain meaningful data? Then perhaps ‘ZIP–Labs’ are for you…
ZIP-Labs are designed to be completed within a 60 minute time frame but can be expanded to fit into greater time frames as well. This is usually achieved by reducing the amounts of chemicals used, number of steps involved, and the amount of time devoted to each step. The focus of the lab is on the overall scientific principle and less on accuracy/precision. Students are asked to record data as accurately as possible given the time allowed, but they are given sample data that will yield good results. Students are asked to compare their results to the idealized results. They are then asked to think about how the limitations and simplifications affected their results in hindsight.
I realize this is not a perfect solution and I’m not recommending that all labs be conducted this way, but I do feel sometimes student can’t see the forest through trees when the laboratory procedures are too complex or there just isn’t enough time to complete the lab and obtain meaningful results.
During ZIP-Labs, I ask students to focus on one or two chemical principles and/or skills. I find that students are often more apt to understand the sources of error, ways they could perfect their results, and the overall chemical principles as a result.
Each Zip Lab includes potentially much more than any teacher will use at the particular grade level he or she may teach. However, it is my hope that teachers, and students, at lower grade levels will gain valuable insight by looking ahead to see how their teaching/learning will be applied in the future. While teachers and students at higher grade levels can reflect on topics that they should have learned in earlier grades. It is my hope that students see their education as a continuum rather than a series of disconnected and random topics.
Zip Labs include diagrams and illustrations that I hope are appealing to a wide range of ages. However, teachers can choose to omit them if they like. Also included is a Common Core ‘Depth of Knowledge’ and grade level range ‘sliding’ indicator to help students visualize the relevance of their work.
Stoichiometry and % Yield: What you get…
Activity cover sheet
Results and conclusions worksheet
Advanced data and conclusions
Advanced inquiry on hydrates
Advanced inquiry on molecular structures
-Depth of Knowledge & Grade Level Slide Indicator Graphics
This unit activity meets or exceeds 21st Century and STEM learning expectations, and Common Core learning outcomes. Note: although ZIP-labs fulfill many CCSS specific CCS standards are not listed because ZIP-labs are designed to be used over many graded levels so the specific CCSS may be different depending upon these factors. For a list of CCSS in your state please visit- www.corestandards.org
Working to change STEM to STEAM.