Module 6 Intro

1. Module 6 Intro

1.22. Lesson 4 Intro

Lesson 4

Module 6—Stoichiometry

Lesson 4—Solution Stoichiometry

Get Focused

A photograph of an astronaut typing on the keyboard of a computer inside the crew compartment of a space shuttle.

Image courtesy of NASA

The ability to launch humans into space and then support them while they are there involves the coordination of many systems. It might surprise you that circuit boards like the one pictured below are involved in all systems of a spacecraft. Whether the system is designed to control the flow of fuel into a rocket engine or to control the composition of gases within the crew compartment of the spacecraft, electronic circuits are involved.

A photograph of a circuit board for a computer. The surface of the circuit board has many small holes. From the small holes are thin lines of copper metal across the circuit board. There are many thin lines arranged closely together, but not touching.

©vadim kozlovsky/shutterstock/11241025

The manufacture of a circuit board actually involves removing the copper metal from a plate. Proper treatment and handling of the industrial waste from this process attempts to reclaim the copper. The process involves knowledge of the stoichiometry of aqueous solutions.

In the previous lessons you learned to use stoichiometry to predict quantitative changes of solid and gaseous substances. As you were shown in Modules 4 and 5, many chemical processes occur in aqueous solutions. Knowledge of stoichiometry involving solutions is essential in understanding many industrial and environmental issues.

In this lesson you will use stoichiometry to predict the quantities of substances in chemical reactions that involve solutions.

Essential Questions

How is the stoichiometric method applied to reactions that involve solutions?

Module 6: Lesson 4 Assignment

Save a copy of the Module 6: Lesson 4 Assignment to your course folder. You will receive more information about how to complete this assignment later in this lesson.

In Lesson 4 you will continue to work on the Module Assessment (Part 4)—Stoichiometry Calculator. You will submit the work you complete in this lesson to your teacher for marking. Before you submit the final version of your Stoichiometry Calculator, you may wish to check the scoring guide and other information listed in the Module Assessment section. Remember to keep a copy of your Stoichiometry Calculator in your course folder.

You must decide what to do with the questions that are not marked by the teacher.

Remember that these questions provide you with the practice and feedback that you need to successfully complete this course. You should respond to all the questions and place those answers in your course folder.