Chemical Reactions
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Rader's CHEM4KIDS.COM - Chemistry basics for everyone!

Chem4Kids.com! The site that teaches the basics of chemistry to everyone! Tutorials on matter, atoms, elements, the periodic table, reactions, and biochemistry.
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CHEMTUTOR REACTIONS

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This site includes the following :

What is a chemical reaction?

Examples of chemical changes, physical changes, and some gray areas.

Chemical equations of chemical reactions.

Balancing equations.

Balancing ionic equations with polyatomic ions.

Balancing combustion (burning) equations.

Balancing by overview.

Synthesis reactions.

Decomposition reactions.

Single replacement reactions.

Double replacement reactions.

Some chemical equations for you to balance.

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The Effect of Surface Area

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A short step-by-step introduction to surface area
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The effect of catalysts on rates of reaction

Describes and explains the effect of adding a catalyst on the rate of a chemical reaction.
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This page describes and explains the way that adding a catalyst affects the rate of a reaction. It assumes that you are already familiar with basic ideas about the collision theory of reaction rates, and with the Maxwell-Boltzmann distribution of molecular energies in a gas.
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Rates of chemical reactions and the effects of temperature, concentration and catalysts

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After studying this lesson you should be able to:
  describe how temperature changes alter reaction rates explain what makes for "effective" collisions explain what results in "ineffective" collisions describe how reactant concentrations influence the initial rate of a reaction describe how temperature changes influence the initial rate of a reaction tell what effect a catalyst has on the initial rate of a reaction
describe the action of a catalyst on a reaction pathway, give one example
give definitions for effective collisions, ineffective collisions, catalyst, inhibitor, reaction rate
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gcse Rates of Reaction Factors affecting speed of reaction science KS4 science igcse chemistry revision notes KS4 science igcse chemistry revision notes

gcse Rates of Reaction Factors affecting speed of reaction science KS4 science igcse chemistry revision notes KS4 science igcse chemistry revision notes | Chemical Reactions | Scoop.it
This page describes the factors controlling the speeds of chemical reactions and the collision theory behind it discussed.
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The factors affecting the speed of reaction are also presented using particle models to give a theoretical basis to the rules on the effects of concentration, pressure, temperature, solid reactant particle size (surface area), stirring, catalysts and light. Methods of how to collect data are also described and graphical treatment of the observations and how to draw conclusions. How do we graphically interpret tables of results and what graphs are useful and why. How to we calculate the speed of a reaction?

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Solution Concentrations

Solution Concentrations | Chemical Reactions | Scoop.it
General Chemistry Instruction Resources
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In the laboratory, in your body, and in the outside environment, the majority of chemical reactions take place in solutions. Macroscopically a solution is defined as a homogeneous mixture of two or more substances, that is, a mixture which appears to be uniform throughout. On the microscopic scale a solution involves the random arrangement of one kind of atom or molecule with respect to another.
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The effect of surface area on rates of reaction

Describes and explains the effect of changing the surface area of a solid has on determining how fast reactions take place.
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This page describes and explains the effect of changing the surface area of a solid on the rate of a reaction it is involved in. This applies to reactions involving a solid and a gas, or a solid and a liquid. It includes cases where the solid is acting as a catalyst.
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Chemical reactions and catalysts | Sciencelearn Hub

Chemical reactions and catalysts | Sciencelearn Hub | Chemical Reactions | Scoop.it
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A chemical reaction involves a chemical change, which happens when two or more particles (which can be molecules, atoms or ions) interact. For example, when iron and oxygen react, they change to a new substance, iron oxide (rust). Iron oxide has different chemical properties to iron and oxygen. This is different to a physical change. For example, water can turn to ice, but ice is still water in another physical state – ice and water have the same chemical properties.
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