chemistry 1.4

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1.4 ChemistryChemistry 1.4

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Problem Solving in Chemistry

Shape-sorter toys fascinate young children. Typically, the children try placing a shape in different holes until they find the right one. The trial-and-error approach is one method of problem solving, but it is usually not the best one.

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Skills Used in Solving Problems


What is a general approach to solving a problem?

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>Problem Solving in Chemistry


Effective problem solving always involves developing a plan and then implementing that plan.

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Shopping involves problem solving skills.

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Solving Numeric Problems


What are the three steps for solving numeric problems?

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The steps for solving a numeric word problem are analyze, calculate, and evaluate.

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Analyze

To solve a word problem, you must first determine where you are starting from (identify what is known) and where you are going (identify the unknown).

After you identify the known and the unknown, you need to make a plan for getting from the known to the unknown.

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Calculate

If you make an effective plan, doing the calculations is usually the easiest part of the process.

Evaluate

Check that your answer is reasonable and makes sense. Check that it has the correct unit and the correct number of significant figures.

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SAMPLE PROBLEM

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SAMPLE PROBLEM

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Figure 1.25 Map of Indianapolis


SAMPLE PROBLEM

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SAMPLE PROBLEM

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SAMPLE PROBLEM

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Practice Problems


Problem Solving 1.27 Solve Problem 27 with the help of an interactive guided tutorial.

for Sample Problem 1.1


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Solving Conceptual Problems


What are the two steps for solving conceptual problems?

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The steps for solving a conceptual problem are analyze and solve.

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Practice Problems for Conceptual Problem 1.1

Problem Solving 1.29 Solve Problem 29 with the help of an interactive guided tutorial.

For Conceptual Problem 1.1


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Section Quiz

-or-Continue to: Launch:

Assess students’ understanding of the concepts in Section

1.4 Section Quiz

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1.4 Section Quiz

1. Effective problem solving always involves developing a plan and then

a. evaluating the plan.

b. doing calculations.

c. making an estimate.

d. implementing the plan.


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1.4 Section Quiz

2. During the analyze step for solving a numeric word problem, you

a. make an estimate of the answer using correct units.

b. rearrange an equation to solve for an unknown.

c. identify what is known and unknown and make a plan.

d. convert a measurement from one unit to another.


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1.4 Section Quiz

3. The steps for solving a conceptual problem are

a. solve and evaluate.

b. analyze, solve, and evaluate.

c. analyze and solve.

d. analyze, calculate, and evaluate.


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Chem ASAP

Concept Map 1 Solve the Concept Map with the help of an interactive guided tutorial.

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chemistry 1.4

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