human
What is a combination reaction in redox chemistry, and how can it be distinguished from non-redox combination reactions?
gpt
A combination reaction is a reaction in which two substances combine to make a third substance, and it can be a redox reaction if one or both elements in the reaction undergo a change in oxidation state, unlike non-redox combination reactions where compounds are reactants.
Explanation: Combination reactions can be either redox or non-redox reactions, with redox reactions involving a change in oxidation state of the reacting elements, illustrated by the example 2Na (s) + Cl2 (g) > 2NaCl (s).