Types of Reactions

Front

What is a coefficient in a chemical equation?

Back

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

Front

What type of reaction is represented by the equation: Fe + H2O4 → Fe2(SO4)3 + H2?

Back

Single replacement reaction.

Front

What is the general formula for a decomposition reaction?

Back

AB → A + B.

Front

What type of reaction is represented by the equation: 2Pb(NO3)2 → 2PbO + 4NO2 + O2?

Back

Decomposition reaction.

Front

What type of reaction is represented by the equation: 2NO2 → N2 + 2O2?

Back

Decomposition reaction.

Front

Define a synthesis (combination) reaction.

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product, represented as A + B → AB.

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat, typically producing carbon dioxide and water.

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, represented as A + BC → AC + B.

Front

What is the difference between a synthesis reaction and a decomposition reaction?

Back

A synthesis reaction combines substances to form a compound (A + B → AB), while a decomposition reaction breaks down a compound into simpler substances (AB → A + B).

Front

What is the role of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule, for example, in H2O, the '2' indicates there are two hydrogen atoms.