Chapter 1: Keys to the study of Chemistry

· Chemistry: The study of matter and its properties, the changes that matter undergoes, and the energy associated with those changes.

· Matter: Anything that has mass and volume, inertia, and energy(the ability to do work)

· Properties: the characteristics that give each substance its unique identity. They can be 1.Physical (characteristic shown by themselves, without changing or interacting with another substance) A physical change leads to a different form of the same substance (same composition)

· Intensive (independent of amount of material, ex. Density)

· Extensive(depend on amount of material, ex volume)

· 2.Chemical-how some material reacts in the presence of other. A chemical reaction occurs when a substance (or substances) is converted into a different substance. A chemical change leads to a different substance (different composition) (see attached 1.1)

· Liquid conforms a container shape, but to the extent of the liquids own volume

· Gas conforms container shape, but fills entire container.

· Potential Energy- Energy due to position.

LABORATORY PREPARATION OF MOLAR SOLUTIONS

· Precision How close all trial of measurement are to each other (deviation from other obtained values)

Usually covalent substances are nonelectrolytes.

Although many ionic compounds dissolve in water, many others do not. In those cases, the electrostatic attraction among ions in the compound is greater than the attraction between ions and water molecule, so the substance remains intact. (they actually do dissolve, but in quantities too small to make a difference.)

· NO MOLECULES EXIST IN A SAMPLE OF AN IONIC COMPOUND.

· Ionic bond- the attraction between a cation and an anion in an ionic compound.

· PRECISE MEASUREMENTS HAVE LOW RANDOM ERROR.

Some common words found in the essay are:
Guide Chemistry, PS- Type, SI Units, PERCENT YIELDS, Introduction Bonding, WATER Water's, IONIC COMPOUNDS, Atomic Symbol, PRECISE TOOL, Amount Substance-mole-mol, atomic mass, compounds ·, chemical reactions, ionic compounds, · law, compound ·, atom ·, · tin, limiting reactant, * volume, low random error, highly reactive elements, * volume dilution, · polyatomic ions, ionic compound ·,
Approximate Word count = 2746
Approximate Pages = 11 (250 words per page double spaced)