- Submitted By: pbandjelly123
- Date Submitted: 01/19/2015 4:52 PM
- Category: Science
- Words: 4938
- Page: 20

FINAL CHEMISTRY STUDY GUIDE

Chapter 1: Chemistry – The Study of Matter and the Changes It Undergoes

1.1 = Types of Matter

Matter

Matter

Mixtures

Pure Substances

Heterogeneous

Homogeneous

Element

Compound

(course) = you can differentiate different parts (visually/with a microscope)

(Solution) - can't differentiate

Just a pure, simple element such as Gold or Carbon

Contains more than one element. A compound is 2 or more different elements chemically bonded together, such as NaCl. Always contain elements in same mass percentages.

To separate mixtures:

Filtration = to separate heterogeneous mixtures

Distillation = to separate homogeneous mixtures

Chromatography = to separate volatile gasses

1.2 = Measurements

Metric Prefixes

106 = Mega (M)

103 = Kilo (k)

102 = hecto (h)

101 = deka (d)

10-1 = Deci (d)

10-2 = centi (c)

10-3 = milli (m)

10-6 = micro ()

10-9 = nano (n)

10-12 = pico (p)

Precision = basically how many decimal places your measurement has (eg. 4.125 is more precise than 4.1)

Accuracy = how well your measurement agrees with right/defined answer

Significant Digits:

Non-Zero digits are significant!

Zeros:

Leading Zeros = not significant = 0.00025 (only 2 and 5 are significant)

Captive Zeros = are significant = 1.008 or 1105, in both all numb. are sig

Trailing Zeros = When number does not have decimal (150) = not significant, but when number does (1.0500), trailing zeros are significant

Exact Numbers = have no significant value meaning

Can be counted = (5 pennies)

If defined = 12 inches in a foot, 2.54 cm in an inch

Addition/Subtraction

Result can only contain as many decimal places as number with least amount of decimal places

Multiplication/Division

Result can only have as many significant digits as number with least amount of significant digits. (501*25 = 12500 but = 1.3x104 because 25 only has 2 sigs)

Important Conversions To Remember:

ToF = (9/5*ToC) + 32o

ToC =...