Unit 7 Review: Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

What is a reactant in a chemical equation?

Back

A substance that undergoes change during a chemical reaction, found on the left side of the equation.

Front

What is a product in a chemical equation?

Back

A substance that is formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does a coefficient represent in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What does a subscript indicate in a chemical formula?

Back

A small number written after an element symbol that shows the number of atoms of that element in a molecule.

Front

How do you balance a chemical equation?

Back

By adjusting the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is a precipitate in a chemical reaction?

Back

An insoluble solid that forms when two solutions are mixed and a chemical reaction occurs.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat from the surroundings, while exothermic reactions release heat.

Front

What is a balanced chemical equation?

Back

An equation that has the same number of each type of atom on both sides, indicating that mass is conserved.