Quiz Yourself Using These 20 Practice Chemistry Tests

This collection of chemistry test questions is grouped according to subject. Each exam has answers supplied at the end. They provide a useful study tool for students. For instructors, they are a good resource for homework, quiz, or test questions, or practice for the AP Chemistry test.

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Significant Figures and Scientific Notation

Measurement is an important concept in all science. Your total measurement precision is only as good as your least precise measurement. These test questions deal with the topics of significant figures and scientific notation.

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Unit Conversion

Converting from one unit of measurement to another is a basic scientific skill. This test covers unit conversions between metric units and English units. Rember to use unit cancellation to easily figure units in any science problem.

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Temperature Conversion

Temperature conversions are common calculations in chemistry. This is a collection of questions dealing with conversions between temperature units. This is important practice because temperature conversions are common calculations in chemistry.

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Reading a Meniscus in Measurement

An important laboratory technique in a chemistry lab is the ability to accurately measure a liquid in a graduated cylinder. This is a collection of questions dealing with reading the meniscus of a liquid. Remember that the meniscus is the curve seen at the top of a liquid in response to its container.

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Density

When you're asked to calculate density, ensure that your final answer is given in units of mass—grams, ounces, pounds, or kilograms—per volume, such as cubic centimeters, liters, gallons, or milliliters. The other potentially tricky part is that you may be asked to give an answer in units that are different than those you are given. Review the unit conversion test questions above if you need to brush up on unit conversions.

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Naming Ionic Compounds

Naming ionic compounds is an important skill in chemistry. This is a collection of questions dealing with naming ionic compounds and predicting the chemical formula from the compound name. Remember that an ionic compound is a compound formed by ions bonding together through electrostatic forces.

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The Mole

The mole is a standard SI unit used primarily by chemistry. This is a collection of test questions dealing with the mole. A periodic table will be useful in helping complete these.

Chemical Formulas Practice Test Questions

By Todd Helmenstine

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Molar Mass

The molar mass of a substance is the mass of one mole of the substance. These test questions deal with calculating and using molar masses. An example of a molar mass might be: GMM O₂ = 32.0 g or KMM O₂ = 0.032 kg.

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Mass Percent

Determining the mass percent of the elements in a compound is useful to find the empirical formula and molecular formulas of the compound. These questions deal with calculating mass percent and finding empirical and molecular formulas. When answering the questions, remember that the molecular mass of a molecule is the total mass of all the atoms making up the molecule.

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Empirical Formula

The empirical formula of a compound represents the simplest whole number ratio between the elements that make up the compound. This practice test deals with finding empirical formulas of chemical compounds. Keep in mind that the empirical formula of a compound is a formula that shows the ratio of elements present in the compound but not the actual numbers of atoms found in the molecule.

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Molecular Formula

The molecular formula of a compound is a representation of the number and type of elements present in one molecular unit of the compound. This practice test deals with finding the molecular formula of chemical compounds. Note that the molecular mass or molecular weight is the total mass of a compound.

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Theoretical Yield and Limiting Reactant

Stoichiometric ratios of the reactants and products of a reaction can be used to determine the theoretical yield of the reaction. These ratios can also be used to determine which reactant will be the first reactant to be consumed by the reaction. This reactant is known as the limiting reagent. This collection of 10 test questions deals with calculating theoretical yields and determining the limiting reagent of chemical reactions.

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Chemical Formulas

These 10 multiple choice questions deal with the concept of chemical formulas. Covered topics include simplest and molecular formulas, mass percent composition, and naming compounds.

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Balancing Chemical Equations

You probably won't get far in chemistry before needing to balance a chemical equation. This 10-question quiz tests your ability to balance basic chemical equations. Always start by identifying each element found in the equation.

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Balancing Chemical Equations No. 2

Being able to balance chemical equations is important enough to have a second test. After all, a chemical equation is a type of relation you will encounter every day in chemistry.

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Chemical Reaction Classification

There are many different types of chemical reactions. There are single and double replacement reactions, decomposition reactions and synthesis reactions. This test contains 10 different chemical reactions to identify.

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Concentration and Molarity

Concentration is the amount of a substance in a predefined volume of space. The basic measurement of concentration in chemistry is molarity. These questions deal with the measurement molarity.

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Electronic Structure

It is important to understand the arrangement of electrons making up an atom. Electronic structure dictates the size, shape, and valence of atoms. It also can be used to predict how electrons will interact with other atoms to form bonds. This test covers the concepts of electronic structure, electron orbitals, and quantum numbers.

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Ideal Gas Law

The ideal gas law can be used to predict the behavior of real gasses in situations other than low temperatures or high pressures. This collection of questions deals with the concepts introduced with the ideal gas laws. The Ideal Gas Law is the relationship described by the equation:

PV = nRT

where P is pressure, V is volume, n is the number of moles of an ideal gas, R is the ideal gas constant and T is the temperature.

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Equilibrium Constants

Chemical equilibrium for a reversible chemical reaction occurs when the rate of the forward reaction equals the rate of the reverse reaction. The ratio of the forward rate to the reverse rate is called the equilibrium constant. Test your knowledge about equilibrium constants and their use with this 10-question equilibrium constant practice test.