Chemical Reactions Module Exam Practice Flashcard

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in an equation that indicates how many molecules or moles of that substance are involved in the reaction.

Front

State the Law of Conservation of Mass.

Back

The Law of Conservation of Mass states that in a closed system, the total mass of the reactants equals the total mass of the products in a chemical reaction.

Front

What are the coefficients that balance the equation Na₃PO₄ + Al(OH)₃ → AlPO₄ + H₂O?

Back

3, 1, 1, 3.

Front

What products are formed when FeBr₂ reacts with K₂CO₃?

Back

FeCO₃ and KBr.

Front

What is a double displacement reaction?

Back

A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds, represented as AB + CD → AD + CB.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another, involving the breaking and forming of bonds.

Front

What is the difference between reactants and products?

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 to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

Front

What is the significance of the arrow in a chemical equation?

Back

The arrow in a chemical equation indicates the direction of the reaction, showing that reactants are transformed into products.

Front

What is an example of a synthesis reaction?

Back

An example of a synthesis reaction is 2H₂ + O₂ → 2H₂O, where hydrogen and oxygen combine to form water.