This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A 0.535 g sample of pyrolusite ore (impure MnO2) is treated with 1.42 g oxalic acid (H2C2O4 2H2O) ... (Read 37 times)

PhilipSeeMore

  • Hero Member
  • *****
  • Posts: 561
on: Jul 8, 2021
A 0.535 g sample of pyrolusite ore (impure MnO2) is treated with 1.42 g oxalic acid (H2C2O4 ∙ 2H2O) in an acidic medium. Following this reaction, the excess oxalic acid is titrated with 0.1000 M KMnO4, 36.6 mL being required. What is the % MnO2 in the ore? The reactions are:

H2C2O4∙ 2 H2O(aq) + MnO2(s) + 2 H+(aq) → Mn2+(aq) + 4 H2O(l) + 2 CO2(g)
5 H2C2O4∙ 2H2O(aq)+ 2 MnO4-(aq) + 6 H+(aq) → 2 Mn2+(aq) + 18 H2O(l) + 10 CO2(g)

◦ 34.4%
◦ 61.1%
◦ 2.33%
◦ 1.22%
◦ 38.9%
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by PhilipSeeMore on Jul 8, 2021

miss_1456@hotmail.com

  • Sr. Member
  • ****
  • Posts: 289
Reply #1 on: Jul 8, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


PhilipSeeMore

  • Member
  • Posts: 561
Reply 2 on: Jul 8, 2021
Gracias!

debra928

  • Member
  • Posts: 342
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Conversion of pyruvate to acetyl CoA, the junction between glycolysis and the citric acid cycle. Conversion of pyruvate to acetyl CoA, the junction between glycolysis and the citric acid cycle.
What a tremendous photo for sociologists! Seldom are we treated to such cultural contrasts. Can you ... What a tremendous photo for sociologists! Seldom are we treated to such cultural contrasts. Can you ...
The amino acid neurotransmitters. The amino acid neurotransmitters.
The stomach lining: gastric glands and the secretion of hydrochloric acid. The stomach lining: gastric glands and the secretion of hydrochloric acid.
Overview of intermediary metabolism with fatty acid and triacylglycerol pathways highlighted Overview of intermediary metabolism with fatty acid and triacylglycerol pathways highlighted
Sample Inclusion for Various s Sample Inclusion for Various s
Video: Sigmoidoscopy

For a complete list of videos, visit our video library