Chemical reactions
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Balancing Chemical Equations
Attempt to balance specific types of chemical reactions: combination, decomposition, single replacement, and double replacement. … While balancing the reactions, the number of atoms on each side is presented as visual, histogram, and numerical data.
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Chemical Equations
Practice balancing chemical equations by changing the coefficients of reactants and products. As the equation is manipulated, the amount … of each element is shown as individual atoms, histograms, or numerically. Molar masses of reactants and products can also be calculated and balanced to demonstrate conservation of mass.
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Colligative Properties
Determine how the physical properties of a solvent are dependent on the number of solute particles present. Measure the vapor … pressure, boiling point, freezing point, and osmotic pressure of pure water and a variety of solutions. Compare the effects of four solutes (sucrose, sodium chloride, calcium chloride, and potassium chloride) on these physical properties.
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Collision Theory
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts … on reaction rates. Reactant and product concentrations through time are recorded, and the speed of the simulation can be adjusted by the user.
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Dehydration Synthesis
Build a glucose molecule, atom-by-atom, to learn about chemical bonds and the structure of glucose. Explore the processes of … dehydration synthesis and hydrolysis in carbohydrate molecules.
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Equilibrium and Concentration
Observe how reactants and products interact in reversible reactions. The initial amount of each substance can be manipulated, as well as … the pressure on the chamber. The amounts, concentrations, and partial pressures of each reactant and product can be tracked over time as the reaction proceeds toward equilibrium.
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Equilibrium and Pressure
Observe how reactants and products interact in reversible reactions. The amounts of each substance can be manipulated, as well as the … pressure on the chamber. This lesson focuses on partial pressures, Dalton's law, and Le Chatelier's principle.
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Limiting Reactants
Explore the concepts of limiting reactants, excess reactants, and theoretical yield in a chemical reaction. Select one of two … different reactions, choose the number of molecules of each reactant, and then observe the products created and the reactants left over.
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Mystery Powder Analysis
Perform multiple experiments using several common powders such as corn starch, baking powder, baking soda, salt, and gelatin. The results … of the research on the known powders can then be used to analyze several unknowns using the scientific method. The unknowns can be a single powder or a combination of the known powders.
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pH Analysis
Test the acidity of common substances using pH paper. Materials including soap, lemon juice, milk, and oven cleaner can be tested by … comparing the color of pH strips to a standard scale.
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pH Analysis: Quad Color Indicator
Test the acidity of many common everyday substances using pH paper (four color indicators). Materials including soap, lemon juice, milk, … and oven cleaner can be tested by comparing the color of the pH strips to the calibrated scale.
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Stoichiometry
Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units … of the answer. Tiles can be flipped, and answers can be calculated once the appropriate unit conversions have been applied.
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Titration
Measure the quantity of a known solution needed to neutralize an acid or base of unknown concentration. Use this information to calculate … the unknown concentration. A variety of indicators can be used to show the pH of the solution.
