The following plot shows the vapor pressure of various solutions of components A and B at some temperature.
Which of the following statements is false concerning solutions of A and B? (Select all that apply.)
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Chemistry is Life!
-Too often kids get to high school chemistry and they are scared before they even begin.
-My goal is to shape a positive image in their minds about chemistry so that they can be more prepared
mentally for high school.
-I will do this by
Atoms, Molecules and Ions
Dalto s Ato ic Theor
1. Elements are composed of extremely small particles called atoms. All atoms of a given element
are identical. The atoms of one element are different from the atoms of all other elements.
2. Compounds are co
Acids and Alkalis
When a substance dissolves in water it makes a solution.
Solutions can be sorted by whether they are: acid, alkali or neutral.
When the oxide of some non-metals dissolve in water they make an acid.
Metal + Acid
Salt + Hydrogen
For a chemical reaction to occur, bonds must be both formed and broken
Fe + CuSO4
Chemical reactions always involve energy changes.
Making and breaking bonds involves energy changes
Cu + FeSO4
ENERGY AND CHEMICAL REACTION
HISTORY OF THE ATOM
460 BC Democritus develops the idea of atoms
he pounded up materials in his pestle and mortar until he had reduced them to smaller and
smaller particles which he called
(greek for indivisible)
suggested that all matte
the Oxygen Group
The Oxygen Family
The first two members of Group 16, oxygen and sulfur, are essential for life.
The heavier members of the group, tellurium and polonium, are both metalloids.
Ozone, a less common form of oxygen, is formed in the upper atm
Everything in this universe is made out of approximately 100 different kinds of atoms
Sand (Silicon, Oxygen)
Table Salt (Sodium, Chloride)
Water (Oxygen, Hydrogen)
They are as letters in an alphabet.
Chemical reactions are very common in lif
The Drinking Habit
The recommended limits of alcohol consumption are 2-3 units per day for women and
3-4 units for men. In standard UK pub measures a unit is half a pint of ordinary beer or
lager, a third of a pint of strong brew, a small glass of table
Indicators help you find out whether a solution is acidic or not.
They change colour in acid or alkaline solutions.
Different indicators change to different colours.
Litmus is an indicator. It changes colour in acid and alkaline sol
Yeast is the star of the drinks industry. If it feeds on sugar in the absence of oxygen, it
releases carbon dioxide and ethanol - the drinkable form of alcohol
Only 20% of the alcohol you swallow is absorbed by the stomach
Heavy drinking is blame