5.2 Types of Reactions

A reaction where a single compound breaks down into two or more simpler products. Example: $$2KI -> 2K + I_2$$ .

A reaction where two or more reactants combine to form a single product. Example: $$O_2 + H_2 -> H_2O$$ .

A reaction where one element replaces another in a compound. Example: $$Zn + 2HCl -> ZnCl_2 + H_2$$ .

A reaction where the anions and cations of two different compounds switch places, forming two new compounds. Example: $$AgNO_3 + NaCl -> AgCl + NaNO_3$$ .

A reaction that involves the burning of a substance in the presence of oxygen, producing heat and light. Example: $$CH_4 + 2O_2 -> CO_2 + 2H_2O$$ .

A + B -> AB.

AB -> A + B.

A + BC -> AC + B.

AB + CD -> AD + CB.

A pure substance that cannot be broken down into simpler substances by chemical means. Example: Carbon (C).