Question

directions: each set of lettered choices below refers to the numbered statements immediately following it. select the one lettered choice that best fits each statement. a choice may be used once, more than once, or not at all in each set. refer to the following types of chemical or physical changes
(a) oxidation - reduction reaction
(b) bronsted - lowry acid - base reaction
(c) sublimation
(d) precipitation
occurs when aqueous solutions of ammonia and vinegar are mixed

Explanation:

Ammonia (\(NH_3\)) is a base and vinegar (acetic acid, \(CH_3COOH\)) is an acid. According to the Brønsted - Lowry theory, an acid - base reaction involves the transfer of a proton (\(H^+\)). In this case, acetic acid donates a proton (\(H^+\)) to ammonia. The reaction is \(CH_3COOH+NH_3
ightarrow CH_3COO^- + NH_4^+\). Oxidation - reduction reactions involve the transfer of electrons (change in oxidation states), which is not the case here. Sublimation is a physical change (solid to gas without passing through the liquid state). Precipitation is the formation of an insoluble solid from a solution, which does not occur when ammonia and vinegar are mixed.

Answer:

B. Brønsted - Lowry acid base reaction