These worksheets look at all the different aspects of representing a chemical reaction.

Chemical reactions are happening all the time around use and we just don’t realize it. Ever clean your kitchen with something other than water? Ever rinse with mouth wash? Have you seen the glorious baking soda and vinegar volcano that is so popular at science fairs? Chemical reactions happen when molecules from one substance break apart and combine, to some degree, with another. This usually is irreversible and forms a new substance all together. Some reactions give off heat, like hand warmers. Some take in heat (get colder). Instant ice packs are an example of that. Some reactions give off brilliant colors. Where do you think firework reactions come from?

Reaction can take place quickly or slowly depending on the nature of the substances involved. If you tried to form rust from some iron, it can take an average of two weeks. On the other hand, if you put hydrochloric acid in the presence of sodium hydroxide you will get a reaction that produces salt and water in seconds. These worksheets will look at all the different types of chemical reaction you will see in any science curriculum. This group of sheets really focuses on understanding how a reaction can be understood from the molecular masses all the way through to diagramming the reaction that takes place.

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Print Chemical Reactions Worksheets

Click the buttons to print each worksheet and associated answer key.

Balancing Reactions

Provide the coefficients to balance the chemical equations shown below.

Gram Formula Mass

What is the mass of one mole of each of these substances?

Percentage Mass

The proportion of the total mass of a compound that is due to each element can be calculated and is called the mass percent.

Binary Formulas

Provide the formulas for the compounds formed from combining the listed ions.

Name Binary Compounds

Provide the names for the ionic compounds shown.

Name Binary Covalent Compounds

Name the compounds that share electrons.

Determining Formulas of Polyatomic Ions

What compound forms? For extra credit name the compound in words.

Name Non-Binary Compounds

These are a little more difficult.

Name Mixed Compounds

Write the name of each compound shown here.

Writing Formulas Based on Names

Write the equation for each formula that you come across.

Balance Chemical Equation.

Take another crack at stoichiometry with this worksheet.

Name-Based Chemical Equations

Write out what happens completely here with these.

Reaction Types

Classify each chemical reaction as either a decomposition, single replacement, double replacement, or synthesis.

Name Organic Compounds

Make sure to count your units of oxygen and hydrogen.

Draw Structural Formulas

You will be given an organic compound and asked to structural draw it.

Isomers of Organic Molecules

Structural isomers are molecules that have the same chemical formula, but different structural formulas.

Organic Chemistry Crossword

Find all the organic chem. terms in that puzzle.

What Are They?

Reactions rates can be sped up with the application of energy like heat, sunlight, or electricity or by increasing the concentration or pressure of the reactants.

What Are They? Questions

Alternatively, the addition of a third substance called an inhibitor can close down a reaction.

Synthesis Reactions

In a synthesis reaction, two substances combine to form a new substance.

QUESTIONS: Synthesis Reactions

Are the reactants in a synthesis reaction typically individual elements or compounds?

Decomposition Reactions

In a decomposition reaction one more complex substance breaks down to form two separate, simpler substances.

QUESTIONS: Decomposition Reactions

Most decomposition reactions are endothermic. In an endothermic reaction, energy is applied in the form of heat, electricity, or sunlight in order to break down the bonds of a more complex molecule.


Combustion was the first chemical change discovered by man. The ability to use and control fire helped early humans to survive and revolutionized the way that they lived.

QUESTIONS: Combustion

Once started, how long will a combustion reaction continue?

Single and Double Displacement Reactions

A single displacement reaction is also known as a single replacement reaction or a substitute reaction.

QUESTIONS: Single and Double Displacement Reactions

In a double displacement reaction, also known as a metathesis reaction, the compounds on the left side of the equation switch substances.

Photochemical Reactions

A photochemical reaction is a chemical reaction in which the heat needed to induce a chemical reaction comes from molecules of light called photons.

QUESTIONS: Photochemical Reactions

What is the name of the structures plants use to capture sunlight?

Catalysts and Inhibitors

A common way to add a catalyst to a chemical reaction is to add energy in the form of heat, sunlight, or electricity.

QUESTIONS: Catalysts and Inhibitors

An inhibitor is the opposite of a catalyst. Adding an inhibitor increases the amount of activation energy that is needed in order for a chemical reaction to occur.

Reactants, Reagents, and Products

A reactant is a substance that is present at the beginning of a chemical reaction and that is changed by the reaction to create a new substance called the product.

QUESTIONS: Reactants, Reagents, and Products

How and where do you note if a reaction has taken place under certain circumstances?

Acid-Base Reactions

In chemistry, an acid is a substance that can release a proton, and a base is a substance that can receive a proton.

QUESTIONS: Acid-Base Reactions

The most often performed school science experiment is an acid-base reaction: the volcano experiment in which you add vinegar to baking soda.

Oxidation-Reduction Reactions

A redox reaction always take place in two parts: a reduced half and an oxidized half. These two parts always occur together.

QUESTIONS: Oxidation-Reduction Reactions

What kind of reactions are typically (but not always) redox reactions with oxygen being oxidized?