AP Chemistry 4.1-4.4

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.

Front

Define a balanced chemical equation.

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring that mass is conserved.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed before the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

Front

What is a precipitate?

Back

A precipitate is an insoluble solid that forms when two aqueous solutions react.

Front

What is a net ionic equation?

Back

A net ionic equation shows only the species that participate in a reaction, omitting spectator ions.

Front

Define spectator ions.

Back

Spectator ions are ions that do not participate in the chemical reaction and remain unchanged in solution.

Front

How do you identify a precipitate in a reaction?

Back

A precipitate can be identified by observing the formation of a solid when two solutions are mixed.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations is crucial because it reflects the conservation of mass and allows for accurate stoichiometric calculations.

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced equation.

Front

What is the role of water in aqueous reactions?

Back

Water acts as a solvent in aqueous reactions, allowing ions to dissociate and react.