19 In acidic conditions, manganate(VII) ions are reduced to manganese(II) ions, Mn²+. In neutral conditions, manganate(VII) ions are reduced to manganese(IV) oxide, MnO2. 22.0 cm³ of a solution of manganate(VII) ions were needed to oxidise 25.0 cm³ of a solution of iron(II) ions to iron(III) ions in acidic conditions. The same solution of manganate(VII) ions is used to oxidise 25.0 cm³ of the same solution of iron(II) ions in neutral conditions. By considering the oxidation number changes involved, it may be shown that the volume of the manganate(VII) solution required, in neutral conditions, is A 12.6 cm³ □□□ ☑ B 13.2 cm³ C 36.7 cm³ D 38.5 cm³
19 In acidic conditions, manganate(VII) ions are reduced to manganese(II) ions, Mn²+. In neutral conditions, manganate(VII) ions are reduced to manganese(IV) oxide, MnO2. 22.0 cm³ of a solution of manganate(VII) ions were needed to oxidise 25.0 cm³ of a solution of iron(II) ions to iron(III) ions in acidic conditions. The same solution of manganate(VII) ions is used to oxidise 25.0 cm³ of the same solution of iron(II) ions in neutral conditions. By considering the oxidation number changes involved, it may be shown that the volume of the manganate(VII) solution required, in neutral conditions, is A 12.6 cm³ □□□ ☑ B 13.2 cm³ C 36.7 cm³ D 38.5 cm³
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter4: Reactions In Aqueous Solution
Section: Chapter Questions
Problem 58QAP: The iron content of hemoglobin is determined by destroying the hemoglobin molecule and producing...
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Transcribed Image Text:19 In acidic conditions, manganate(VII) ions are reduced to manganese(II) ions, Mn²+.
In neutral conditions, manganate(VII) ions are reduced to manganese(IV) oxide, MnO2.
22.0 cm³ of a solution of manganate(VII) ions were needed to oxidise 25.0 cm³ of a
solution of iron(II) ions to iron(III) ions in acidic conditions.
The same solution of manganate(VII) ions is used to oxidise 25.0 cm³ of the same
solution of iron(II) ions in neutral conditions.
By considering the oxidation number changes involved, it may be shown that the
volume of the manganate(VII) solution required, in neutral conditions, is
A 12.6 cm³
□□□
☑
B
13.2 cm³
C 36.7 cm³
D 38.5 cm³
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