The rusted piece of iron is to be identified and the reason is to be explained. Concept Introduction: Oxidation is the addition of an electronegative element or the removal of an electropositive element in a chemical reaction . Reduction is the addition of an electropositive element or the removal of an electronegative element in a chemical reaction. A chemical reaction in which oxidation process and reduction process take place simultaneously is called a redox reaction . An oxidizing agent is a substance that has the capacity to oxidize the other substances and get reduced in a chemical reaction. A reducing agent is a substance that has the capacity to reduce the other substances and get oxidized in a chemical reaction. Non-metals are a better oxidizing agent than metals. They have the capacity to gain electrons and form negative ions. They have the capacity to oxidize the other substances and get reduced. Metals are a better reducing agent. They have a tendency to lose electrons and form positive ions. They have the capacity to reduce the other substances and get oxidized.

Question

(c) The following data have been obtained for the hydrolysis of sucrose, C12H22O11, to glucose, C6H12O6, and fructose C6H12O6, in acidic solution: C12H22O11 + H2O → C6H12O6 + C6H12O6 [sucrose]/mol dm³ t/min 0 0.316 14 0.300 39 0.274 60 0.256 80 0.238 110 0.211 (i) Graphically prove the order of the reaction and determine the rate constant of the reaction. (ii) Determine the half-life, t½ for the hydrolysis of sucrose.

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Question

Chapter 14, Problem 39E

Interpretation Introduction

Interpretation:

The rusted piece of iron is to be identified and the reason is to be explained.

Concept Introduction:

Oxidation is the addition of an electronegative element or the removal of an electropositive element in a chemical reaction.

Reduction is the addition of an electropositive element or the removal of an electronegative element in a chemical reaction.

A chemical reaction in which oxidation process and reduction process take place simultaneously is called a redox reaction.

An oxidizing agent is a substance that has the capacity to oxidize the other substances and get reduced in a chemical reaction.

A reducing agent is a substance that has the capacity to reduce the other substances and get oxidized in a chemical reaction.

Non-metals are a better oxidizing agent than metals. They have the capacity to gain electrons and form negative ions. They have the capacity to oxidize the other substances and get reduced.

Metals are a better reducing agent. They have a tendency to lose electrons and form positive ions. They have the capacity to reduce the other substances and get oxidized.

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(c) The following data have been obtained for the hydrolysis of sucrose, C12H22O11, to glucose, C6H12O6, and fructose C6H12O6, in acidic solution: C12H22O11 + H2O → C6H12O6 + C6H12O6 [sucrose]/mol dm³ t/min 0 0.316 14 0.300 39 0.274 60 0.256 80 0.238 110 0.211 (i) Graphically prove the order of the reaction and determine the rate constant of the reaction. (ii) Determine the half-life, t½ for the hydrolysis of sucrose.

(III) adsorbent (b) Adsorption of the hexacyanoferrate (III) ion, [Fe(CN)6] ³, on y-Al2O3 from aqueous solution was examined. The adsorption was modelled using a modified Langmuir isotherm, yielding the following values of Kat pH = 6.5: (ii) T/K 10-10 K 280 2.505 295 1.819 310 1.364 325 1.050 Determine the enthalpy of adsorption, AadsHⓇ. If the reported value of entropy of adsorption, Aads Se = 146 J K-1 mol-1 under the above conditions, determine Aads Gº.

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