Chemical reaction FC

What is a chemical reaction?

A process in which reactants undergo chemical change to form products.

What are the substances involved in chemical reactions?

Reactants (starting materials) are transformed into products (new substances).

What is one piece of evidence of a chemical reaction?

Evolution of a gas.

What is the chemical equation that demonstrates the evolution of a gas?

CaCO3 + HCl → CaCl2 + H2O + CO2.

What is another piece of evidence of a chemical reaction?

Production of light.

What is the chemical equation that shows the production of light?

Mg + O2 → MgO.

What can indicate a chemical reaction through a change of color?

A reaction like H2SO4 + KMnO4 + H2O2 → H2O + K2SO4 + MnSO4 + O2.

What is an example of a reaction that releases heat?

NaOH + HCl → NaCl + H2O.

What is a formation of a precipitate?

A reaction such as KCl + AgNO3 → KNO3 + AgCl.

What is a combination/synthesis reaction?

A chemical reaction where elements combine to form a compound, represented as A + B → AB.

What is a decomposition reaction?

A chemical reaction in which a substance breaks down into two or more simpler substances, represented as AB → A + B.

What is a substitution/single replacement reaction?

A reaction in which one element replaces another in a compound, represented as A + BC → AC + B.

What was the first example of substitution reaction?

Mg + 2 HCl → MgCl2 + H2.

What is the double displacement reaction?

A reaction where an exchange occurs between the reactants, represented as AB + CD → AD + BC.

What is an example of a double displacement reaction?

CaCO3 + H2SO4 → CaSO4 + H2CO3.

What is combustion in terms of chemical reactions?

A reaction that occurs when a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water, represented as C10H8 + 12 O2 → 10 CO2 + 4 H2O.