Open Educational Resources | Pao Yue-kong Library, The Hong Kong Polytechnic University

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Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations

Learners examine a table containing the names of common cations and anions.

Subjects:: Chemistry
Keywords:: Ionic structure Ions
Resource Type:: Others

Others

Lewis Dot Structures of Covalent Compounds

In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

Subjects:: Chemistry
Keywords:: Chemical bonds Valence (Theoretical chemistry)
Resource Type:: Others

Others

Intermolecular Forces

In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

Subjects:: Chemistry
Keywords:: Intermolecular forces Molecules
Resource Type:: Others

Others

Gas Volume vs. Pressure (Boyle's Law)

Boyle's Law states that gas volume varies inversely with the pressure at constant temperature and is described by the equation PV = constant. An example of a sample of gas at two conditions of P and V is used to illustrate the law.

Subjects:: Chemistry
Keywords:: Boyle's law Gas laws (Physical chemistry)
Resource Type:: Others

Video

Types of Elements in the Periodic Table and Their Properties (Screencast)

In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

Subjects:: Chemistry
Keywords:: Periodic table of the elements Chemical elements
Resource Type:: Video

Video

Shapes of Simple Molecules - Part 1 (Screencast)

In this animated and interactive object, learners observe how two, three, or four groups of electrons around the central atom cause the shape of the molecule to be linear, trigonal planar, bent, tetrahedral, or pyramidal. Seven examples and eight interactive questions are provided.

Subjects:: Chemistry
Keywords:: Molecules
Resource Type:: Video

Others

The Limiting Reagent in Chemical Reactions

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

Subjects:: Chemistry
Keywords:: Chemical processes Chemical reactions
Resource Type:: Others

Others

The Mole and Avogadro's Number

Learners examine how chemists use moles to "count" atoms by weight. Examples are given.

Subjects:: Chemistry
Keywords:: Mole (Chemistry) Chemical elements Avogadro's law
Resource Type:: Others

Others

Chemical Formulas

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

Subjects:: Chemistry
Keywords:: Chemistry -- Mathematics Chemical structure
Resource Type:: Others

Others

Phase Transitions

Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.

Subjects:: Chemistry
Keywords:: Thermodynamics Phase transformations (Statistical physics)
Resource Type:: Others

Others

Mole Ratios in Chemical Equations

Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

Subjects:: Chemistry
Keywords:: Chemical reactions Chemical equations
Resource Type:: Others

Others

Naming Compounds Containing Polyatomic Ions

Learners examine a table of common polyatomic ions. Eight examples are provided for practice.

Subjects:: Chemistry
Keywords:: Chemical processes Chemical reactions
Resource Type:: Others

Others

Phase Diagrams

Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.

Subjects:: Chemistry
Keywords:: Phase diagrams
Resource Type:: Others

Others

Vapor Pressure

Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.

Subjects:: Chemistry
Keywords:: Vapor pressure
Resource Type:: Others

Video

Acid-Base Reactions (Screencast)

Learners view several movie clips that demonstrate the use of an indicator to follow the neutralization reaction that occurs when an acid and a base are mixed. Students test their knowledge in a series of questions. Immediate feedback is given.

Subjects:: Chemistry
Keywords:: Acids Chemical reactions Bases (Chemistry)
Resource Type:: Video

Others

Oxidation-Reduction Reactions

Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.

Subjects:: Chemistry
Keywords:: Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
Resource Type:: Others

Others

Measuring Gas Pressure

Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.

Subjects:: Chemistry
Keywords:: Natural gas -- Measurement
Resource Type:: Others

Others

Calculation of Atomic Weight from Isotopic Composition

Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.

Subjects:: Chemistry
Keywords:: Chemical elements Atomic weights Copper
Resource Type:: Others

Video

Conversion Between Mass and Moles of an Element (Screencast)

Atomic weights are used to convert the mass of a sample into the number of moles of the element in the sample and vice versa. Four examples are provided for practice.

Subjects:: Chemistry
Keywords:: Mole (Chemistry) Chemical elements Atomic weights
Resource Type:: Video

Others

Precipitation Reactions

In this interactive and animated object, learners use solubility rules to predict when an insoluble ionic compound will precipitate in a double replacement reaction. Step-by-step examples are given.

Subjects:: Chemistry
Keywords:: Chemical reactions Solution (Chemistry)
Resource Type:: Others

Others

Naming Binary Ionic Compounds Containing Variable Oxidation State Cations (Screencast)

Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.

Subjects:: Chemistry
Keywords:: Ionic structure Ions
Resource Type:: Others

Others

The Effect of Temperature on the Vapor Pressure of a Liquid

Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.

Subjects:: Chemistry
Keywords:: Vapor pressure
Resource Type:: Others

Others

Atomic Symbols, Atomic Numbers, and Mass Numbers

Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

Subjects:: Chemistry
Keywords:: Periodic table of the elements Chemical elements
Resource Type:: Others

Video

The Three States of Matter

In this animated and interactive object, learners examine the properties of liquids, solids, and gases.

Subjects:: Chemistry
Keywords:: Matter -- Properties
Resource Type:: Video

Others

Calculating Formula Weight and Molecular Weight

In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

Subjects:: Chemistry
Keywords:: Molecular weights Atomic weights
Resource Type:: Others

Video

Common Types of Oxidation-Reduction Reactions (Screencast)

Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.

Subjects:: Chemistry
Keywords:: Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
Resource Type:: Video

Others

Gas Volume vs. Temperature (Charles's Law)

In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.

Subjects:: Chemistry
Keywords:: Charles' law Gas laws (Physical chemistry) Gase -- Thermal properties
Resource Type:: Others

Others

Boiling Point of a Liquid

Learners examine how the boiling point increases with increasing pressure. An example from industry is given.

Subjects:: Chemistry
Keywords:: Boiling-points
Resource Type:: Others

Others

Heat of Fusion and Heat of Vaporization

Learners examine graphs and read that the heat of fusion is the heat energy absorbed by one mole of solid as it is converted to liquid, while the heat of vaporization is the heat energy absorbed by one mole of liquid as it is converted to gas.

Subjects:: Chemistry
Keywords:: Heat
Resource Type:: Others

Others

Isotopes

The definition of an isotope is illustrated using the three isotopes of carbon. The three isotopes of hydrogen are discussed as exceptions.

Subjects:: Chemistry
Keywords:: Isotopes
Resource Type:: Others

Video

Percent Composition of Compounds (Screencast)

Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.

Subjects:: Chemistry
Keywords:: Chemistry -- Notation Chemical elements
Resource Type:: Video

Others

Atomic Weight

Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

Subjects:: Chemistry
Keywords:: Periodic table of the elements Chemical elements Atomic weights
Resource Type:: Others

Video

Product Yields in Chemical Reactions (Screencast)

Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

Subjects:: Chemistry
Keywords:: Chemical reactions
Resource Type:: Video

Others

Absolute Zero Temperature

Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.

Subjects:: Chemistry
Keywords:: Temperature Low temperatures
Resource Type:: Others

Others

Oxidation Numbers

Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.

Subjects:: Chemistry
Keywords:: Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
Resource Type:: Others

Others

Melting Point and Freezing Point

Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.

Subjects:: Chemistry
Keywords:: Melting points Freezing points
Resource Type:: Others

Others

Ions

Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

Subjects:: Chemistry
Keywords:: Ions
Resource Type:: Others

Others

The Solid State

In this well-illustrated object, learners examine the structures and properties of the four types of solids: molecular, metallic, ionic, and covalent network. Five interactive questions are provided.

Subjects:: Chemistry
Keywords:: Solid state chemistry
Resource Type:: Others

Video

Electromagnetic Radiation (Screencast)

In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

Subjects:: Chemistry
Keywords:: Electromagnetic waves
Resource Type:: Video

Others

Determining Empirical and Molecular Formulas (Screencast)

Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

Subjects:: Chemistry
Keywords:: Molecular weights Chemistry Physical theoretical
Resource Type:: Others

Others

Oxidation States of Ions

Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.

Subjects:: Chemistry
Keywords:: Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
Resource Type:: Others

Others

Ideal Gas Law

In this interactive object, learners use the ideal gas law to solve a practice problem.

Subjects:: Chemistry
Keywords:: Gas laws (Physical chemistry)
Resource Type:: Others

Others

The Combined Gas Law

Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.

Subjects:: Chemistry
Keywords:: Boyle's law Charles' law Gas laws (Physical chemistry)
Resource Type:: Others

Others

The Kinetic Theory of Gases

In this animated activity, learners examine what gases are composed of and how their particles interact. They also consider several assumptions that form the basis for the Kinetic Theory of Gases.

Subjects:: Chemistry
Keywords:: Kinetic theory of gases Gas dynamics
Resource Type:: Others

Others

Solubility of Ionic Compounds in Water

Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.

Subjects:: Chemistry
Keywords:: Chemical reactions Solubility
Resource Type:: Others

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