Write a chemical equation for nh4+(aq) showing how it is an acid or a base according to the arrhenius definition.

An Arrhenius acid by definition dissociates in water to form H3O+ (or H+) ions while an arrhenius base dissociates in water to form OH- ions.

NH4+(aq) can be categorised as an arrhenius acid since it releases H3O+ ions in aqueous media

NH4+(aq) + H2O (aq) ↔ NH3 (aq) + H3O+(aq)

NH₄⁺ will act as acid according to the arrhenius definition.

NH₄⁺ will not act as a base according to the arrhenius definition.

Explanation:

According to the Arrhenius Acid-Base Theory, acids are those substances that dissolved in water divide by generating H⁺ together with an anion (ion with a negative charge). In an aqueous solution, the H⁺ protons react immediately with the water molecules to form H₃O⁺ hydronium ions. A base, on the contrary, according to this theory, is a substance that releases OH- ions in aqueous solution.

This theory is valid only in aqueous medium. And it does not consider non-protic acids (without the presence of H⁺), which are unable to release hydrogen ions, or dehydroxylated bases (they are OH- ions in their structure), unable to release OH- hydroxyl ions.

NH₄⁺ will act as acid because it has an H⁺ proton that can be released into the aqueous solution by:

NH₄⁺(aq) + H₂O (aq) ↔ NH₃ (aq) + H₃O⁺(aq)

NH₄⁺ will not act as a base because it does not have hydroxide ions that can be released into the aqueous medium.

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.