The formulas of potassium nitride and cobalt(III) oxide are to be written. Concept introduction: When atom accepts or loses electrons it is termed as ion. If the ion is formed from a single atom, it is referred as monatomic ion. But, in nature, many compounds are found as polyatomic ions (poly = many). Polyatomic ions are electronically neutral, for example, ammonium ion will not exist without its counter negative ion. In general, formulas of ionic compounds depict the ratio of positive and negative ions found in a substance. Moreover, the formulas of compounds are made up of lowest whole number ratio of ions i.e., formula unit. Notably, the number of positive units and the number of negative units will be equal in a chemical formula. The polyatomic ion when used in more than once, parentheses is used, and the parentheses is applied only for polyatomic ions.

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 6, Problem 9PE

Interpretation Introduction

Interpretation:

The formulas of potassium nitride and cobalt(III) oxide are to be written.

Concept introduction:

When atom accepts or loses electrons it is termed as ion. If the ion is formed from a single atom, it is referred as monatomic ion. But, in nature, many compounds are found as polyatomic ions (poly = many). Polyatomic ions are electronically neutral, for example, ammonium ion will not exist without its counter negative ion. In general, formulas of ionic compounds depict the ratio of positive and negative ions found in a substance. Moreover, the formulas of compounds are made up of lowest whole number ratio of ions i.e., formula unit. Notably, the number of positive units and the number of negative units will be equal in a chemical formula. The polyatomic ion when used in more than once, parentheses is used, and the parentheses is applied only for polyatomic ions.

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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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