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Cause and effect relationships can be suggested and predicted for complex natural and human designed systems by examining what is known about smaller scale mechanisms within the system.
Introduction In this lesson students will review how to write formulas for ionic compounds and how to balance chemical equations. These topics are essential to the new material in this lesson, which is learning how to write balanced chemical equations for neutralization reactions.
This lesson aligns to the NGSS Practices of the Scientist of Developing and Using Models because the balanced chemical reaction is a written depiction of a chemical reaction. The process of using the equations to show what is happening in the test tube introduces a level of complexity beyond what students would observe from seeing color changes or even pH changes.
It aligns to the NGSS Crosscutting Concept of Cause and Effect in the sense that balanced chemical equations for neutralization reactions are best understood by examining the smaller scale mechanisms within the system—in this case the formation of a salt and water.
In terms of prior knowledge or skills, students have seen in a previous lesson that mixing an acid and a base together produces a chemical reaction.
They have also learned about differences between acids and bases in this lesson and in this lesson. There are no special materials needed for this lesson. Students begin class by reading page in their textbookand taking notes based on the following prompt that is on the projector screen when they walk into the classroom: Record the following in your notes: Write the example of an acid base reaction.
Label the acid, base, and salt. Record the definition of a salt. I reason that this is a good way to begin class because it introduces students to the material for today.
The textbook is set up so that every student can extract this information, even if they do not completely understand it.
By getting this early exposure, students will have begun thinking about neutralization reactions before I give my lesson on the subject; it is my hope that they will have a little momentum going into the lesson.
After I take attendance I walk around the room to see how students are doing, and they confirm my expectations. After students have had a chance to do this assignment, I ask a student to show their answers to the class.
The salt is the NaCl. Mini-lesson and Guided Practice, Part 1 10 minutes Mini-lesson: My first challenge is to help students remember how to write salts.This vast collection of equation of a line worksheets has been meticulously drafted with the intention of improving logical and analytical skills of students.
Find the linear equation of a line using the point-slope form, slope-intercept form, two-point form, two-intercept form, etc. Balancing chemical equations is a key chemistry skill. Use these step by step instructions to write and balance chemical equations.
1. Write the unbalanced equation. Worksheet #4; Balancing Equations - Answer Key #4; Balance Equations with Mass and Charge.
Some chemical reactions involve ions, so you need to balance them for charge as. Chapter 6 Balancing and Stoichiometry Worksheet Topics: • Balancing Equations • Writing a chemical equation • Stoichiometry Practice: 1.
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