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What triggers a chemical reaction? - Kareem Jarrah

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What is chemical equilibrium? - George Zaidan and Charles Morton

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Balancing Chemical Equations (Balancing Chemical Equations) | Chemistry Simulations | CK-12

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Learn the basic of chemical equations by watching methane bubbles light on fire. Practice balancing chemical equations.

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How to speed up chemical reactions (and get a date) - Aaron Sams

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Practice balancing chemical equations with this game!

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Balancing Chemical Equations Step by Step Practice Problems | How to Pass Chemistry

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Activation energy: Kickstarting chemical reactions - Vance Kite

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Chemical reactions are constantly happening in your body -- even at this very moment. But what catalyzes these important reactions? Vance Kite explains how enzymes assist the process, while providing a light-hearted way to remember how activation energy works.

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Introduction to Balancing Chemical Equations

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Chemical reactions introduction (video) | Khan Academy

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Reactants and products in reversible and irreversible chemical reactions.

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Welcome to CK-12 Foundation | CK-12 Foundation

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The chemistry of cookies - Stephanie Warren

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The chemistry of cold packs - John Pollard

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Under the hood: The chemistry of cars - Cynthia Chubbuck

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ExploreLearning : Get hands-on, minds-on in math and science

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Chemical Changes Gizmo : Lesson Info : ExploreLearning

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Chemical changes result in the formation of new substances. But how can you tell if a chemical change has occurred? Explore this question by observing and measuring a variety of chemical reactions. Along the way you will learn about chemical equations, acids and bases, exothermic and endothermic rea…

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ExploreLearning : Get hands-on, minds-on in math and science

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Chemical Equations Gizmo : Lesson Info : ExploreLearning

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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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Balancing Chemical Equations Gizmo : Lesson Info : ExploreLearning

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Balance and classify five types of chemical reactions: synthesis, decomposition, single replacement, double replacement, and combustion. While balancing the reactions, the number of atoms on each side is presented as visual, histogram, and numerical data.

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ExploreLearning : Get hands-on, minds-on in math and science

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Collision Theory Gizmo : Lesson Info : ExploreLearning

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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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ExploreLearning : Get hands-on, minds-on in math and science

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Electrons and Chemical Reactions STEM Case : Lesson Info : ExploreLearning

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The Secret Service has arrested suspects accused of counterfeiting coins from 1915 valued at $50,000 each. The students act as a forensic scientist to investigate the crime scene and examine the evidence. Students learn about electrons and chemical reactions to recreate the methods used to make the coins and prepare evidence for the court case.

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In a chemical reaction, energy is always conserved, but the form of energy can change. In some reactions, rearrangement of bonds produces new products and heat. In other reactions, the reactants must absorb energy for the reaction to occur. We can ...

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Chemical reactions are evidence a chemical change is occurring. The starting materials change into new products or chemical species. How do you know a chemical reaction has taken place? If you observe one or more of the following, a reaction may have occurred:

While there are millions of different reactions, most can be classified as belonging to one of 5 simple categories. Here is a look at these 5 kinds of reactions, with the general equation for each reaction and examples.

Synthesis Reaction or Direct Combination Reaction

One of the main types of chemical reactions is a synthesis or direct combination reaction. As the name implies, simple reactants make or synthesize a more complex product. The basic form of a synthesis reaction is:

A + B → AB

A simple example of a synthesis reaction is the formation of water from its elements, hydrogen, and oxygen:

Another good example of a synthesis reaction is the overall equation for photosynthesis, the reaction through which plants make glucose and oxygen from sunlight, carbon dioxide, and water:

More Types of Chemical Reactions

In addition to the 5 main types of chemical reactions, there are other important categories of reactions and other ways to classify reactions. Here are some more kinds of reactions:

acid-base reaction: HA + BOH → H2O + BA

neutralization reaction: acid + base → salt + water

oxidation-reduction or redox reaction: one atom gains an electron while another atom loses an electron

isomerization: structural arrangement of a molecule changes, although its formula remains the same

hydrolysis: AB + H₂O → AH + BOH

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Names and Examples of Simple Chemical Reactions

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Chemical reactions are evidence a chemical change is occurring. The starting materials change into new products or chemical species. How do you know a chemical reaction has taken place? If you observe one or more of the following, a reaction may have occurred: While there are millions of different reactions, most can be classified as belonging to one of 5 simple categories.

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Chem4Kids.com! This tutorial introduces basics of chemical reactions. Other sections include matter, elements, the periodic table, and biochemistry.