Molality Teacher Resources
Find Molality educational ideas and activities
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Solutions Quiz Review Sheet
In this solutions worksheet, students use a phase diagram to determine the boiling point and molality of the solution. Students determine the electrical conductivity of a saturated solution. This worksheet has nine problems to solve.
A Solution for Moles
Students calculate the concentration of different solutions. In this chemistry lesson, students explain what a solution is. They explain ways to change the concentration of a solution.
2009 U.S. National Chemistry Olympiad National Exam - Part I
The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to practice for the competition or to prepare for a final exam on behavior of gases, properties of metals, chemical reacitons, pH and titration curves, ionizaton energy, molecular geometry, and more!
2000 U.S. National Chemistry Olympiad Local Section Exam
This 60-question comprehensive exam was designed to determine who would go on to compete in the 2000 US National Chemistry Olympiad. Hopefuls answer multiple choice questions regarding all chemistry topics taught in the first year general chemistry curriculum with a focus on laboratory experience. You can use this as a final exam for your chemistry class. An answer key is attached.
2007 U.S. National Chemistry Olympiad Local Section Exam
Sixty multiple choice questions cover the entire gamut of chemistry concepts. This is the local section of the U.S. National Chemistry Olympiad, where your chemistry candidates take a shot at entering the national competition. They answer questions about everything from properties of liquids and phase changes, to electrolysis products and molecular geometry. You could actually use this as a final exam for your class, a course review, or a practice for the actual chemistry challenge.
2000 U.S. National Chemistry Olympiad National Exam - Part I
The National Chemistry Olympiad exams are comprehensive tests covering an entire year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your general chemistry class. This particular part of the three-part exam consists of 60 multiple choice questions. Read through it before assigning to make sure every question is relevant to your curriculum. As a bonus, you will find an answer key attached.
2002 U.S. National Chemistry Olympiad National Exam - Part I
As to be expected from the American Chemical Society Olympiad Examinations Task Force, this 60-question test tops the charts in terms of excellence. It consists entirely of multiple choice questions designed to assess a year's worth of chemistry curriculum. Topics include, but are not limited to pH, molecular geometry, bonding, behavior of gases and solutions, phase changes, and chemical reactions. Use this as a final exam or as a practice for those who want to enter the nation-wide challenge.
Chemists consider a situation in which an ethanol producer needs to determine how much to add to t-butanol to prevent freezing during transport. They work in the laboratory to obtain the freezing point depression constant for the t-butanol. They graph the temperature changes and answer questions on the provided lab sheet. This is an outstanding application of freezing point concepts to a real-life scenario.
Chapter 12 Review, Mixed Review: Solutions
Although there are only six questions on this chemistry handout, it makes a thorough review of solutions. Novices explain why a compound is not an electrolyte, identify types of compounds, and calculate moles, grams, and molalilties in various solutions. Keep this handy as a possible homework assignment.
Chapter 13 Review, Section 2: Ions in Aqueous Solutions and Colligative Properties
Here is a general chemistry worksheet that incorporates practical applications. Four questions employ critical thinking about solutions, boiling and freezing points, and molar mass. Your class will practice what they learn in class by completing this as homework.
Boiling Point Elevation and Freezing Point Supression
Have you ever wondered why cities in cold climates put salt on the roads to help keep ice from forming? In this chemistry video, Sal explains why the introduction of salt molecules suppresses, or delays, the formation of ice crystals from liquid water. Additionally, he explains how the boiling point of water can be raised by adding certain substances to water. Very interesting!
2008 U.S. National Chemistry Olympiad Part I
In this chemistry Olympiad activity, students solve sixty multiple choice questions on a variety of chemistry topics from finding molarity of solutions to calculating products of reactions. Students are given graphs, equations, reaction rates and other data to analyze.
Suspensions, Colloids and Solutions
Sal introduces students to mixtures and solutions. He starts out by explaining that homogenous mixtures, such as homogenized milk, are mixtures that are even and consistent throughout. He goes on to illustrate how the particle sizes in a variety of mixtures determine how homogenous that mixture will be. Examples include: paint, chocolate milk, jello, smoke, and fog.
Density Studies of the Earth
Density comes to life as investigators place soda cans into containers of various liquids to find if they sink or float. They layer different density liquids, compare densities of different gases, and more. A total of six different density exercises help earth science learners grasp how differing density drives the motion of Earth's magma, oceans, and atmosphere. You will find this unit complete with several assessment or homework assignments.
Recognition and Classification of Mixtures
Immerse your chemistry class in solutions! They melt and compare the mixtures that make up margarine, separate black ink into its component colors, distill ocean saltwater, and practice chromatography with plant pigments. There are eight activities in all, along with 11 assessment questions. This resource is a valuable addition to your chemistry curriculum collection.
2007 U.S. National Chemistry Olympiad Part II
Eight multi-step chemistry problems, including analyzing a titration, writing equations, predicting products and limiting reagents, calculating concentrations of ions, and using stoichiometry to solve for unknowns in reactions make up this outstanding exam.
2008 U.S. National Chemistry Olympiad Part III
In this chemistry olympiad lab worksheet, chemists are required to design two experiments. In one, they design an experiment to identify seven solutions given to them in pipettes. In the other, they design an experiment to determine the amount of gas the type of metal produced when two given substances are mixed in a balloon.
2001 U.S. National Chemistry Olympiad - Local Section Exam
Sixty multiple-choice chemistry questions make up this comprehensive exam used for the 2001 US National Chemistry Olympiad. Every topic that you would expect to approach in a general chemistry class is queried on. You could easily use this as a first semester exam or as a practice for the final. An answer key is included, making it a cinch for you to use!
2004 U.S. National Chemistry Olympiad - Local Section Exam
In this National Olympiad exam worksheet, chemistry apprentices answer sixty multiple choice questions including general chemistry topics such as atomic structure, gases, problem solving, writing and balancing equations and solutions. This and other National Olympiad exams are outstanding in content and format.
2009 U. S. National Chemistry Olympiad - Local Section Exam
Here is a copy of a past national challenge exam that you can use in your general chemistry course as a unit or semester review. Sixty multiple-choice questions query learners on properties of matter, stoichiometry, reactions, and different intermolecular forces. The American Chemical Society Olympiad Examinations Task Force has produced this and other annual exams that are all-inclusive and professional in appearance. An answer key is included for your convenience.