Acids & BasesWhile there are some good inquiry labs here, some others aren't a huge departure from the cookbook experiments. Because some labs require more sophisticated analysis, I want students to have some guidance. At this point in the semester, I'm just trying to keep up... so I don't want to mess too much with a good thing. Many of the changes are subtle, and concern language.
I wonder if it would be possible to get to the same result with even less structure? (Or with students collaborating to build the structure together?) If you try something and it's successful, please share! |
Relative Strengths of Weak Acids
This is a lab handout structure for Lab 13B in Essential Experiments.
Students are asked to explain what their data means as they proceed through the experiment.
Since problem-solving and data analysis are the main focus of this task, a data collection chart has been provided to help students focus simply on analysis.
Lab - Relative Strength of Weak Acids - Student Handout
Students are asked to explain what their data means as they proceed through the experiment.
Since problem-solving and data analysis are the main focus of this task, a data collection chart has been provided to help students focus simply on analysis.
Lab - Relative Strength of Weak Acids - Student Handout
pH Scale Intro
This honest-to-goodness problem-solving activity is one of my favourites! It can usually be introduced, completed, and debriefed within an hour, it requires hardly any materials, and it opens up fascinating conversations with students.
The goal of this lab: before we get into the nuts and bolts of pH math, students need to blast apart a common misconception.
Lab - pH Intro - Teacher Notes
The goal of this lab: before we get into the nuts and bolts of pH math, students need to blast apart a common misconception.
Lab - pH Intro - Teacher Notes
Hydrolysis of salts
This is another data-heavy lab, based on Lab 13D in Essential Experiments.
This version involves salt pastes, but solutions will work, too.
A procedure and data collection/analysis chart has been provided for students.
The inquiry tweaks are the pattern recognition and C/E/R in the conclusion.
Lab - Hydrolysis of Salts - Student Handout
Lab - Hydrolysis of Salts - Data sheet (prints on 8.5 x 14)
This version involves salt pastes, but solutions will work, too.
A procedure and data collection/analysis chart has been provided for students.
The inquiry tweaks are the pattern recognition and C/E/R in the conclusion.
Lab - Hydrolysis of Salts - Student Handout
Lab - Hydrolysis of Salts - Data sheet (prints on 8.5 x 14)
Titration: Finding the Molar Mass of a Monoprotic Weak Acid
My 12s are comfortable enough with titration procedures by now that I am not even going to tell them this is a titration... just let them figure out what the best procedure should be. This lab is adapted from Essential Experiments, (Lab 13G - Part III).
Note: This lab was successful, but there were a few wrinkles I hadn't anticipated - check out the teacher notes!
Lab - Molar Mass of an Acid - Student Handout
Lab - Molar Mass of an Acid - Teacher Notes
Note: This lab was successful, but there were a few wrinkles I hadn't anticipated - check out the teacher notes!
Lab - Molar Mass of an Acid - Student Handout
Lab - Molar Mass of an Acid - Teacher Notes