State whether each of the following statements is true or false. Justify your answer in each case. (a) NH3 contains no OH- ions, and yet its aqueous solutions are basic

검증된 단계별 안내

Identify the chemical formula and structure of ammonia (NH3). Ammonia is a compound consisting of nitrogen and hydrogen atoms.

Understand the behavior of ammonia in water. When NH3 is dissolved in water, it reacts with water molecules to form ammonium ions (NH4+) and hydroxide ions (OH-).

Write the chemical equation for the reaction of ammonia with water: NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH-(aq).

Analyze the presence of OH- ions. From the reaction, it is evident that OH- ions are produced, which are responsible for the basic nature of the solution.

Conclude that the statement 'NH3 contains no OH- ions, and yet its aqueous solutions are basic' is false because the basic nature of NH3 solutions is due to the presence of OH- ions produced in the reaction with water.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Ammonia and Basicity

Ammonia (NH3) is a weak base that can accept protons (H+) from water, leading to the formation of ammonium ions (NH4+) and hydroxide ions (OH-) in solution. This reaction increases the concentration of OH- ions, which is responsible for the basic nature of the solution, even though NH3 itself does not contain OH- ions.

Equilibrium in Aqueous Solutions

In aqueous solutions, a dynamic equilibrium exists between the reactants and products of a chemical reaction. For ammonia, the equilibrium between NH3, NH4+, and OH- illustrates how the presence of NH3 can lead to the generation of OH- ions, contributing to the basicity of the solution despite NH3 lacking OH- in its molecular structure.

pH and Basic Solutions

The pH scale measures the acidity or basicity of a solution, with values below 7 indicating acidity and values above 7 indicating basicity. A basic solution has a higher concentration of OH- ions, which raises the pH. Therefore, the presence of OH- ions, even if generated from NH3, is what classifies the solution as basic.