Laboratory 17 -18
Analysis by Precipitation
To determine the percentage of potassium iodide in an unknown mixture.
Stoichiometry involves using the molar ratios in balanced chemical equations to calculate the
Analysis by Decomposition
To determine the percentage of potassium in an unknown mixture.
In this experiment, a sample of potassium chlorate will be analyzed in order to determine the
amount of o
To determine the percentage of potassium iodide in an unknown mixture
1. Obtain the mass of 250mL beaker
2. Add to the beaker between 0.8 and 1.2 grams of pure potassium iodide
3. Dissolve the potassium iodide in 25 mL of distilled w
Heat of Reactions
To determine the amount of heat absorbed or released by a reaction based on the temperature
change occurs as a result of the reaction.
Heat capacity can be calculated by using the following f
Back Titration of Antacid Tablets
Determine how much acid (HCI) can be neutralized by 3 brands of antacids.
To find the molarity using the following formula:
Moles of solute
M= = solute
Liters of solution
Enthalpy of Vaporization for Water
Determine the enthalpy of vaporization for water.
The Clausius-Clapeyron equation is a mathematical expression relating the variation of
vapor pressure and the enthalpy of va
24 October 2013
1. Five different categories of hazardous materials are explosives, gases, flammable liquids
and solids, radioactive material, and corrosives.
2. A characteristic of hazardous waste is
10 October 2013
Chapter 17 Review Questions
1. The quantity of municipal solid waste generated is directly related to economic condition.
Richer countries produce more garbage than poorer countries.
25 October 2013
1. The two primary gases in the atmosphere are nitrogen and oxygen
4. The five primary air pollutants commonly released into the atmosphere and their sources
are carbon monoxide, volat
Chapter 15 Review Questions:
1. The hydrologic cycle is a constant recycling process that begins with the evaporation of
water from the ocean. Warm air cools and water forms and falls to the land as
precipitation. This water either si
14 November 2013
9. Pesticides are commonly used in mechanized agriculture because each year weeds,
insects, bacteria, fungi, viruses, birds, rodents, mammals, and other organisms consume
or destroy a
14 November 2013
1. Three reasons land-use planning is necessary are between one third and one half of the
worlds surface has been altered by humans, most land-use decisions are still based
5 November 2013
1. Three ways humans directly alter ecosystems are land is cleared for farming, streams are
dammed to create water power, and various mineral resources are exploited to provide
9 October 2013
Chapter 10 Review Questions
The general characteristics of renewable energy sources are
13 percent of the worlds energy comes from renewable energy sources.
Biomass provides the
8 October 2013
Chapter 9 Review Questions
1. The three most important sources of energy are oil, coal, and natural gas.
3. Three factors that can cause the amount of an oil reserve to increase are with advances
14 November 2013
1. Risk assessment is used in environmental decision making by providing environmental
decision makers with an orderly, clearly stated, and consistent way to deal with scientific
3 December 2013
1. Environmental crisis demands a new ethic because toxic waste contaminates
groundwater, oil spills destroy shorelines, and fossil fuels produce carbon dioxide, adding
to global warmin
5 December 2013
The legislative branch, or Congress, is directed to declare and shape national policy by
passing legislation, or enacting a law. The executive branch, or the president, is directed
Chapter 1 Review Questions (#1-7)
1. Finding solutions to environmental problems is so difficult because environmental
science also deals with politics, social organization, economics, ethics and
philosophy. It is the mixture of traditional s