Molar relationships: Observing a single displacement reaction
In this chemistry lab, the students will investigate a single replacement reaction while also determining mole ratios to determine percent yields.
1. Determine type of reaction is occurring in this lab
2. Use knowledge of molar ratios to determine grams of product produced
1. Determining theoretical yields/losses using molar conversions
2. Understanding types of reactions
1. Single replacement reactions
2. Theoretical yield
3. Molar ratios/conversions
Context for Use
Resource Type: Activities:Lab Activity
Grade Level: High School (9-12)
Description and Teaching Materials
Materials: beaker, stirring rod, sandpaper, balance
Intro: The students have looked at different kinds of reactions, but they have not been discussed in detail. I tell them that it will be one of the reactions they know and that they should think about what all the chemicals are "doing" in the reaction. We also review molar conversions before we begin.
The experiment starts by having the students make a copper solution. They then place two iron nails in the solution and allow it to sit over night. They then determine how grams of copper produced and iron lost using molar ratios and conversions.
Close: At the ens of the lab, we brainstorm other chemical reactions that are like the one in lab.
This activity is adapted from another source.
Moles of Copper and Iron Lab (Microsoft Word 76kB Sep25 07)
Teaching Notes and Tips
e. Students know how to calculate the masses of reactants and products in a chemical reaction from the mass of one of the reactants or products and the relevant atomic masses.