This activity is acid-base titration lab where students determine the percent of calcium carbonate in an eggshell.
In this activity, students use the virtual lab to create 500mL of 3M HCl solution from a concentrated stock solution of 11.6M HCl. They must first calculate the correct volumes of 11.6M HCl solution and water to mix together to create the final solution. Next, they prepare the solution using the appropriate glassware, and then can check their answer using the concentration viewer in the solution info panel.
In this field-based exercise, students were given a tour of an abandoned mine site and asked to utilize a set of field measurements to describe the spatial details of metal transport. This drew on previous experience with field measurements and prompted them to work together to solve an observed chemical evolution of a contaminated brook. The exercise is an excellent example for students to bring together acid-base chemistry, redox chemistry, and thermodynamic concepts together to describe a reasonably complex system. The field component was completed in a full day, but we will be expanding this next fall for a 2 day exercise (weekend). The exercise was coupled with subsequent labs to complete analysis of the water samples and accomplish speciation calculations using PHREEQCI.
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Intended Audience: This activity was used for an introductory Geochemistry class, which contained students from sophomore level to master's students. We took the trip in mid-October, about as late as possible in Vermont, after they had gained some previous field experience and lab work in addition to an in introduction to these principles in class.
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This video follows biologist Gretchen Hofmann as she studies the effects of ocean acidification on sea urchin larvae.
Cluster of questions on acid rain deposition.
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This short video is an excerpt from the longer video Acid Test: The Global Challenge of Ocean Acidification, produced by the National Resources Defense Council (NRDC). This short version summarizes the science of ocean acidification as well as the social implications.
Students research the acidification of freshwater streams and lakes, identify at least one of the sources, and determine how their daily activities contribute to the problem.
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Acidity is a tricky concept, and it’s not always like how we see it in the movies. As organic chemists, we need to know how to predict the strength of weak acids and bases. In this episode of Crash Course Organic Chemistry, we’ll learn four key factors that we can use to predict relative acidity. This important tool will help us us to predict the products of chemical reactions.
The most important property of carboxylic acids, an the one that is responsible for naming them such, is their acidity. An acid is any compound that donates a hydrogen ion (H+, also called a proton) to another compound, termed a base. Carboxylic acids to this much more readily than most other classes of organic compounds, so they are said to be stronger acids, even though they are much weaker than the most important mineral acids -- sulfuric acid (H2SO4), nitric acid (HNO3), and hydrochloric acid (HCl).
Learn about acids, bases and alkalis through engaging, bitesize animated videos. They are organised into these chapters: acids and bases, acid reactions, soluble salts, insoluble salts and uses of salts.
This module provides an intrioduction to acid and base chemistry. The Arrhenius and Bronsted-Lowry concepts of acids and bases are discussed as well as the pH scale and neutralization reactions.
In this video segment, the ZOOM cast demonstrates how to use cabbage juice to find out if a solution is an acid or a base.
This is a pdf of a presentation. It can be used to expand upon or introduce the topic of Acids and Bases within chemistry. It primarily goes over the basics but could be used at any point.
This activity must be conducted under the direct supervision of an adult familar with laboratory safety practices. Personal protection equipment, inlcuding goggles and apron must be utilized.In this exploration students will:recognize some acids and bases as common and familiar household chemicals.realize that acids and bases are not necessarily strong or dangerous.determine the pH of different chemical compounds and categorize them as acids or bases.investigate how the difference between acids and bases correlates to the difference in hydrogen ion concentration of solutions of the two classes of compounds.Link to lesson
This is a lab followed by questions to help students understand how acids and bases interact. It also helps students understand how pH works.
In this video segment adapted from ZOOM, two cast members demonstrate what happens when vinegar is added to baking soda inside a container. The resulting chemical reaction produces enough carbon dioxide to launch their paper rocket skyward.
Recommended for: Grades K-5
A link to a google presentation that covers the topics of acids, bases, pH, indicators, neutralization, and titration
This is a review of information that should have been learned regarding acids, bases, and pH. It is a series of questions followed by answers and explanations.
A car propelled by the reaction between lemon juice and baking soda has more in common with rockets and jet aircraft than one might think. In this video segment adapted from ZOOM, two cast members demonstrate the power of rocket-propelled vehicles and how to exploit the force produced by the carbon dioxide gas. Grades 3-8.