Chemistry ~ The Basic Concepts

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Thursday, July 30th, 2015

Why Chemistry???The fact is that you can't ignore chemistry because chemistry will not ignore you.

The quality of your life is directly affected by Chemistry!

What is Chemistry?....the study of matter, the changes matter undergoes, and the

energy related to those changes

The Scientific Method:

Doing Science is Dynamic!!!

•Make an Observation...Ask a question •Do Background Research•Construct a Hypothesis•Experiment•Analyze Data•Conclude & Communicate

Make an Observation...

QuantitativeQualitativeObjectiveSubjective

Numbers

Fact (not biased)

5 Senses

Opinion

Hypothesis/Experiment

Hypothesis: Educated guess,If/then format

Rules for Recording Data

Table 1: Absorbance of Red Dye at different concentrations

You need to write the DATE you collect the data

Concentration Absorbance (nm)100 g/L 1.38

10 g/L 0.133

1 g/L 0.018

0.1 g/L 0.001

0.01 g/L 0.001

What is the purpose of analyzing data?

Patterns

Graphs

Summaries

What type of graph should I be using?

Bar Graph Line GraphDiscrete Data Continuous Data

(independent data points) ex) How many people eat donuts for breakfast each day in a week

(related data points)ex) The growth of a plant during a week

Percent Data (%) - Pie Graph

What is the purpose of analyzing data?

Patterns Graphs

SummariesRules for Reporting Data

#1 All Tables and Graphs should have a DESCRIPTIVE title#2 No Naked # (units)#3 Both Axis Labeled #4 Legend #5 Graphs are to be 1/2 page or more

with even increments