Balancing, Types of Chemical Equations and Predicting Products

Front

What is the law of conservation of mass?

Back

In a chemical reaction, the total mass of the reactants must equal the total mass of the products.

Front

What are coefficients in a chemical equation?

Back

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

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Front

What is a single replacement reaction?

Back

A single replacement reaction is a type of chemical reaction where one element replaces another in a compound.

Front

What is an activity series?

Back

An activity series is a list of metals arranged in order of decreasing reactivity, used to predict the outcomes of single replacement reactions.

Front

How do you balance the equation: Al + HCl → AlCl3 + H2?

Back

The balanced equation is 2 Al + 6 HCl → 2 AlCl3 + 3 H2.

Front

What is a double replacement reaction?

Back

A double replacement reaction is a type of chemical reaction where two compounds exchange ions to form two new compounds.

Front

What is the purpose of balancing chemical equations?

Back

The purpose is to ensure that the same number of each type of atom is present on both sides of the equation, reflecting the conservation of mass.

Front

What does it mean if a reaction is endothermic?

Back

An endothermic reaction absorbs heat from its surroundings.

Front

What does it mean if a reaction is exothermic?

Back

An exothermic reaction releases heat to its surroundings.