Embedded Files
The Mole
The Mole
Rubric
Rubric
Mole: Student can describe substances in terms of the mole.
1. Describe a mole.
2. Calculate molar mass of a compound.
3. Perform 1 step mole problems.
4. Perform multi step mole problems.
5. Solve stoichiometry problems
Summary of lesson
Summary of lesson
The mole unit consisted of four days and a half with an assessment at the last half day. Below are highlights of the lesson!
Day 1: Rice Challenge
Day 1: Rice Challenge
Students work in groups to design a way to calculate the amount of rice in the baggie without opening the bag. All they can use are the materials show on the right.
Learning Goals
Learning Goals
- Students practice working with peers to solve problem
- Students figure out that they can't weight only one rice.
- Students make their own "rice unit" of mass or volume.
Transition to next topic
Transition to next topic
The rice challenge is used to get students thinking about units and the difficulties of measuring small things. Students are asked "What is smaller than a rice?" This allows for a smooth transition into the introduction of the Mole.
Learning Goals
Learning Goals
- Students get a better understanding of molar mass
- Visual students have now something concrete to relate the mole concept to.
- Students practice calculating molar mass.
Day 2: Mystery Mole
Day 2: Mystery Mole
The mole can be a very hard thing for students to grasp because the unit is too big to imagine! This activity is used to help students better understand what molar mass is in terms of elements and compounds. Students are challenged to find the molar mass of each mystery mole substance!
Day 3: Chalk Lab
Day 3: Chalk Lab
"How many moles of chalk are in my name?"
"How many moles of chalk are in my name?"
Students work together to calculate how many moles and molecules of chalk are used to write their name. They are told that chalk is actually calcium carbonate!
Transition to next topic
Transition to next topic
Students go from grams of calcium carbonate to moles to molecules step by step. This is then introduced as a two step conversion problem! After this activity students continue solving two step conversion problems without scaffolding.
Menu Choice
Menu Choice
Day 3 and 4
Day 3 and 4
On the last two days of the unit students are given a menu choice. Students must take a quiz beforehand to figure out at what level they must start from. This helps students from all different levels practice their weaknesses. Advanced students can start stoichiometry on their own. Teacher stamps students as they complete activities to ensure all students are on task.
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