Q5. Chlorine is an important industrial chemical. (a) Chlorine is formed when KMNO, reacts with hydrochloric acid. The ionic equation for this redox reaction is 16H + 2MNO, 10CI → 2Mn" + 8H,0 + 5CI, (i) Deduce the half-equation for the oxidation of chloride ions to chlorine. (ii) Give the oxidation state of manganese in the MnO, ion. (iii) Deduce the half-equation for the reduction of the Mno, ions in acidified solution to manganese(ll) ions and water. (b) Chlorine behaves as an oxidising agent in the extraction of bromine from seawater. In this process, chlorine gas is bubbled through a solution containing bromide ions. (i) Write the simplest ionic equation for the reaction of chlorine with bromide ions. Page 8 of 12 (i) Give one observation that would be made during this reaction. (iii) In terms of electrons, state the meaning of the term oxidising agent. (c) In sunlight, chlorine can also oxidise water slowly to form oxygen. Write an equation for this reaction. Give the oxidation state of chlorine in the chlorine-containing species that is formed. Equation Oxidation state of chlorine in the species formed (d) Explain why chlorine has a lower boiling point than bromine.
Q5. Chlorine is an important industrial chemical. (a) Chlorine is formed when KMNO, reacts with hydrochloric acid. The ionic equation for this redox reaction is 16H + 2MNO, 10CI → 2Mn" + 8H,0 + 5CI, (i) Deduce the half-equation for the oxidation of chloride ions to chlorine. (ii) Give the oxidation state of manganese in the MnO, ion. (iii) Deduce the half-equation for the reduction of the Mno, ions in acidified solution to manganese(ll) ions and water. (b) Chlorine behaves as an oxidising agent in the extraction of bromine from seawater. In this process, chlorine gas is bubbled through a solution containing bromide ions. (i) Write the simplest ionic equation for the reaction of chlorine with bromide ions. Page 8 of 12 (i) Give one observation that would be made during this reaction. (iii) In terms of electrons, state the meaning of the term oxidising agent. (c) In sunlight, chlorine can also oxidise water slowly to form oxygen. Write an equation for this reaction. Give the oxidation state of chlorine in the chlorine-containing species that is formed. Equation Oxidation state of chlorine in the species formed (d) Explain why chlorine has a lower boiling point than bromine.
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter3: Chemical Reactions
Section: Chapter Questions
Problem 57QRT
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