Question

1. explain using a formula to show the difference between these 4 reaction types. note you may use the generic formula or specific examples. /4 formation decomposition single substitution double substitution

Explanation:

Step1: Define formation reaction

A + B → AB (generic formula). Example: 2H₂ + O₂ → 2H₂O. Two or more substances combine to form one compound.

Step2: Define decomposition reaction

AB → A + B (generic formula). Example: 2H₂O → 2H₂ + O₂. One compound breaks down into two or more simpler substances.

Step3: Define single - substitution reaction

A + BC → AC + B (generic formula). Example: Zn + 2HCl → ZnCl₂+ H₂. One element replaces another element in a compound.

Step4: Define double - substitution reaction

AB + CD → AD + CB (generic formula). Example: AgNO₃ + NaCl → AgCl + NaNO₃. The positive and negative ions of two ionic compounds exchange places.

Answer:

Reaction Type	Generic Formula	Example
Decomposition	AB → A + B	2H₂O → 2H₂ + O₂
Single Substitution	A + BC → AC + B	Zn + 2HCl → ZnCl₂ + H₂
Double Substitution	AB + CD → AD + CB	AgNO₃ + NaCl → AgCl + NaNO₃