Stoichiometric Calculations
Now you're ready to use what you know about conversion factors to solve
some stoichiometric problems in chemistry. Almost all stoichiometric
problems can be solved in just four simple steps:
1. Balance the equation.
o Fe + O2Fe
What is the pH of a solution of 40.0 g acetic acid, HAc, in 2.00 L of water? Acetic
acid has a K a of 1.76 x 10-5.
Explain why HClO4 is more acidic than HClO3.
According to the Pauling-Ricci rule, pK a = 8 - 9f + 4n , f for HClO4 is 3 whereas HClO3
has f
In order to introduce the idea of rate, let's suppose we wish to know how fast the following reaction is
going:
One way to do this is to define rate as the change in concentration of some species with respect to time, and
then measure the concentrations o
Given the below initial rate data, determine the rate law and rate constant for the following reaction:
By taking the ratios of the rates of experiments 3 and 1 we can obtain the order of the reaction in chlorite.
Finally, by taking the ratios of the rate
Gases
The first step to understanding gases is to spell out what exactly a gas is. Gases have two properties that set
them apart from solids and liquids. First, gases spontaneously expand to fill the container they occupy, no
matter its size. In other wor
Atmosphere - A unit of measurement defined as 101,325 Pascals. The typical pressure at sea level varies
around one standard atmosphere (atm). Atmospheric pressure P can be calculated via the following
equation: P = gh
Bar - A unit of measurement equivalen
Avogadro's number - 6.021023 ; the number of particles that make up the measure of 1
mole.
Chemically engineered - Produced by chemical means.
Mole - A measure of amount. 1 mole equals 6.021023 items of something. The number
is so massive because moles ar
Conversion Factor - A ratio (or fraction) that represents the relationship between two
different units.
Formula Unit - The representative particle of a substance. It is the smallest unit of a
substance that still retains that substance's properties and is
Conversion Factors
The easiest way to do stoichiometric calculations involves using conversion factors. A
conversion factor is a ratio (or fraction) which represents the relationship between two
different units. A conversion factor is ALWAYS equal to 1. H
Acids and Basis- Introduction Terms
Acid - A substance that has the potential to donate a proton (H+) or accept an electron
pair.
Acidic - Having a pH less than 7.
Arrhenius Model - Arrhenius proposed that acids are substances that produce protons,
H+, in