A classification of each of the compounds given below as a strong acid, strong base, weak base, amphoteric substance, or neither acid nor base has to be done. Concept Introduction: A strong acid must possess an ionisable proton which can be donated and its acid ionization constant should be large. A strong base must have the capacity to accept a proton and its base ionization constant should be large. Amphoteric substance can act both as an acid and a base. The judgment of weak and strong are relative to each other which can be obtained by comparing their acid ionization constant or base ionization constant. The substance having large value of K a will be stronger acid and large value of K b will be stronger base.
A classification of each of the compounds given below as a strong acid, strong base, weak base, amphoteric substance, or neither acid nor base has to be done. Concept Introduction: A strong acid must possess an ionisable proton which can be donated and its acid ionization constant should be large. A strong base must have the capacity to accept a proton and its base ionization constant should be large. Amphoteric substance can act both as an acid and a base. The judgment of weak and strong are relative to each other which can be obtained by comparing their acid ionization constant or base ionization constant. The substance having large value of K a will be stronger acid and large value of K b will be stronger base.
Solution Summary: The author explains the classification of each of the compounds given below as a strong acid, strong base, weak base and amphoteric substance.
A classification of each of the compounds given below as a strong acid, strong base, weak base, amphoteric substance, or neither acid nor base has to be done.
Concept Introduction:
A strong acid must possess an ionisable proton which can be donated and its acid ionization constant should be large. A strong base must have the capacity to accept a proton and its base ionization constant should be large. Amphoteric substance can act both as an acid and a base.
The judgment of weak and strong are relative to each other which can be obtained by comparing their acid ionization constant or base ionization constant. The substance having large value of Ka will be stronger acid and large value of Kb will be stronger base.
Draw the complete mechanism for the reaction below. Please include appropriate arrows, intermediates, and formal charges.
(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.
Chapter 14 Solutions
OWLv2 for Moore/Stanitski's Chemistry: The Molecular Science, 5th Edition, [Instant Access], 1 term (6 months)
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