Unit 4 Reactions Review (H)

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a formula in a chemical equation to indicate the number of molecules or moles of that substance involved in the reaction.

Front

What does the symbol (s) represent in a chemical equation?

Back

The symbol (s) represents a solid state of matter, indicating that the substance is an insoluble solid compound.

Front

Which product is insoluble in the reaction ZnCl2 + LiOH → Zn(OH)2 + LiCl?

Back

Zinc hydroxide (Zn(OH)2) is the insoluble product in this reaction.

Front

What is a precipitate?

Back

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

Front

Which reaction type always starts with a hydrocarbon and produces carbon dioxide and water?

Back

Combustion is the reaction type that starts with a hydrocarbon and reacts with oxygen to produce carbon dioxide and water.

Front

What is the state of matter symbol for an aqueous solution?

Back

The symbol (aq) represents an aqueous solution, indicating that the substance is dissolved in water.

Front

What is the difference between a reactant and a product in a chemical reaction?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What does it mean for a compound to be soluble?

Back

A compound is soluble if it can dissolve in a solvent, typically water, to form a homogeneous solution.

Front

What is the role of a balanced chemical equation?

Back

A balanced chemical equation shows that the number of atoms of each element is conserved during a chemical reaction, ensuring that mass is neither created nor destroyed.

Front

What is the significance of the law of conservation of mass in chemical reactions?

Back

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