SNC2D6 - Chemistry Unit

Ionic compounds

A metal and non-metal

Molecular compounds

Two non-metals

Properties of ionic compounds

High melting point, conductive, highly soluble

Properties of molecular compounds

Low melting points, non conductors, usually insoluble

5 clues of a chemical change

Gas bubbles, colour change, temperature change, production of light, smell or taste change

Types of chemical reactions

Combination/synthesis, decomposition, single replacement, double replacement, combustion

Acid properties

Sour, creates H+ ion, corrosive, reactive, good conductors

Base properties

Bitter, slippery, creates OH- ion, can break down proteins, good conductors, water soluble

Acids formula

Start with Hydrogen

Bases formula

Ends with hydroxide (OH) or bicarbonate (HCO3)

Diatomic molecules

Oxygen, Fluoride, Chlorine, Bromine, Iodine, Hydrogen

Ionic dissociation

Acids and bases dissolved in water, ions separate, free to move

Neutralization reactions

When acids and bases react, leaving a salt and water

Oxyacids

Compounds formed when hydrogen combines with poly atomic ions containing oxygen

pH

Power of Hydrogen

Each number on the ph scale is

Logarithmic 10x

Acid indigestion

When you have too much acid in your stomach, treated with a slightly basic substance

Balancing chemical equations

1. Count atoms on each side of the equation