6.00 & of dry pyrolusite containing mainly manganese (IV) oxide was reacted with
12.00 g of...
6.00 & of dry pyrolusite containing mainly manganese (IV) oxide was reacted with
12.00 g of ethanedioic acid dihydrate, H, C,0,.2H,0 (an excess) in the presence
of excess sulphuric acid until all the manganese (IV) oxide had reacted. The
insoluble impurities were filtered and the filtrate was made up to 1.00 dm with
distilled water. Manganese (IV) oxide oxidises ethanedioic acid according to the
equation.
MnO(s) + 420,0 (aq) + 2H+ (aq) → Mn2+ (aq) + 24,0(1) + 200, (8)
(a) 25.0 cm of this solution required 22.50 cm' of a 0.0190 mol am potassium
manganate(VII) for complete reaction, according to the equation.
2000, (aq) + 55,0204(aq) + 6*(aq) → Mn2+ (aq) + 10002 (8) + 8H40(1)
Calculate the mass of unreacted H, C,0,.2,0 in the solution.
(b) calculate the mass of HC 0, 1,0 which had reacted with the Mno, present in
the sample of pyrolusite.
Hence calculate the percentage of manganese (IV) oxide in the pyrolusite.
Answers: 1
Other questions on the subject: Chemistry
Chemistry, 21.06.2019 18:10, gonzalesalexiaouv1bg
Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydroxide.
Answers: 1
Chemistry, 22.06.2019 21:30, emmalucilleblaha1995
Achemical reaction is done in the setup shown, resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?
Answers: 1
Chemistry, 23.06.2019 07:00, bree6754
Achemist who studies water samples did a demonstration of how to test for lead in water. she added a clear solution of potassium iodide to a clear solution of lead nitrate. then a yellow swirling solid formed in the liquid. what is most likely true about the yellow solid?
Answers: 3
Chemistry, 23.06.2019 13:00, jacobanderson43
What type of reaction is this equation c2h5s + o2 > co2 + h2o + so2
Answers: 2
Do you know the correct answer?
Questions in other subjects:
