Chemical Reactions Review

Front

What happens in a chemical reaction when all of one reactant is used up?

Back

The reaction stops when all of one reactant (either the limiting reactant) is consumed.

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) through the breaking and forming of chemical bonds.

Front

What is the role of heat in a chemical reaction?

Back

Heat can provide the energy needed to initiate a reaction or to sustain it, such as in combustion.

Front

What is evidence of a chemical reaction?

Back

Evidence includes changes in color, temperature, gas production, or the formation of a precipitate.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Products are the new substances formed as a result of a chemical reaction.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides, following the law of conservation of mass.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.

Front

What is a catalyst?

Back

A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

Front

What is the significance of chemical bonds in reactions?

Back

Chemical bonds are broken and formed during reactions, leading to the transformation of reactants into products.