Acidified Aqueous Potassium Manganate(VII) Is A Purple Solution.What Does The (VII) In The Name Potassium Manganate(VII) Represent?A. The Charge On The Potassium Ion B. The Charge Of The Manganate Ion C. The Number Of Ions In The Compound D. The

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Understanding the (VII) in Potassium Manganate(VII)

Introduction

In the world of chemistry, the naming of compounds can be a complex and nuanced topic. One of the key components of a compound's name is the Roman numeral in parentheses, which indicates the oxidation state of the element. In the case of potassium manganate(VII), the (VII) represents the oxidation state of the manganese ion. But what does this mean, and how is it determined?

The Importance of Oxidation State

The oxidation state of an element is a measure of its degree of oxidation, which is the loss or gain of electrons. In the case of potassium manganate(VII), the manganese ion has an oxidation state of +7. This means that the manganese ion has lost 7 electrons, resulting in a +7 charge.

Determining Oxidation State

The oxidation state of an element can be determined by looking at the compound's formula and the charges of the other ions present. In the case of potassium manganate(VII), the formula is K2MnO4. The potassium ion (K+) has a charge of +1, and the oxygen ion (O2-) has a charge of -2. Since the compound is neutral, the sum of the charges of the ions must equal zero.

Calculating Oxidation State

To calculate the oxidation state of the manganese ion, we can use the following equation:

Oxidation state of Mn = (charge of K+) x 2 + (charge of O2-) x 4

Plugging in the values, we get:

Oxidation state of Mn = (1) x 2 + (-2) x 4 Oxidation state of Mn = 2 - 8 Oxidation state of Mn = -6

However, since the manganese ion is the central ion in the compound, it must have a positive charge to balance the negative charges of the oxygen ions. Therefore, the oxidation state of the manganese ion must be +7.

Conclusion

In conclusion, the (VII) in the name potassium manganate(VII) represents the oxidation state of the manganese ion, which is +7. This is determined by looking at the compound's formula and the charges of the other ions present. Understanding the oxidation state of an element is crucial in chemistry, as it can help us predict the properties and behavior of a compound.

Key Takeaways

  • The (VII) in the name potassium manganate(VII) represents the oxidation state of the manganese ion.
  • The oxidation state of an element is a measure of its degree of oxidation.
  • The oxidation state can be determined by looking at the compound's formula and the charges of the other ions present.
  • Understanding the oxidation state of an element is crucial in chemistry.

Frequently Asked Questions

  • Q: What is the oxidation state of the manganese ion in potassium manganate(VII)? A: The oxidation state of the manganese ion is +7.
  • Q: How is the oxidation state of an element determined? A: The oxidation state of an element is determined by looking at the compound's formula and the charges of the other ions present.
  • Q: Why is understanding the oxidation state of an element important in chemistry? A: Understanding the oxidation state of an element is crucial in chemistry, as it can help us predict the properties and behavior of a compound.

Further Reading

  • For more information on oxidation state, see the article on "Oxidation State: A Key Concept in Chemistry".
  • For more information on the compound potassium manganate(VII), see the article on "Potassium Manganate(VII): A Purple Solution".
    Acidified Aqueous Potassium Manganate(VII) Q&A

Introduction

Acidified aqueous potassium manganate(VII) is a purple solution that has been a topic of interest in chemistry for many years. In this article, we will answer some of the most frequently asked questions about acidified aqueous potassium manganate(VII).

Q&A

Q: What is acidified aqueous potassium manganate(VII)?

A: Acidified aqueous potassium manganate(VII) is a solution of potassium manganate(VII) that has been acidified with a strong acid, such as sulfuric acid.

Q: What is the color of acidified aqueous potassium manganate(VII)?

A: The color of acidified aqueous potassium manganate(VII) is purple.

Q: What is the oxidation state of the manganese ion in acidified aqueous potassium manganate(VII)?

A: The oxidation state of the manganese ion in acidified aqueous potassium manganate(VII) is +7.

Q: How is acidified aqueous potassium manganate(VII) prepared?

A: Acidified aqueous potassium manganate(VII) is prepared by dissolving potassium manganate(VII) in water and then adding a strong acid, such as sulfuric acid.

Q: What is the purpose of acidifying potassium manganate(VII)?

A: The purpose of acidifying potassium manganate(VII) is to convert the manganate ion to the permanganate ion, which is a more stable and reactive form of the manganese ion.

Q: What are some common uses of acidified aqueous potassium manganate(VII)?

A: Some common uses of acidified aqueous potassium manganate(VII) include:

  • As a disinfectant and sanitizer
  • As a stain remover and bleaching agent
  • As a catalyst in chemical reactions
  • As a reagent in analytical chemistry

Q: Is acidified aqueous potassium manganate(VII) safe to handle?

A: Acidified aqueous potassium manganate(VII) can be hazardous if not handled properly. It can cause skin and eye irritation, and can also be toxic if ingested. It is recommended to handle acidified aqueous potassium manganate(VII) with caution and to wear protective gear, such as gloves and goggles.

Q: How should acidified aqueous potassium manganate(VII) be stored?

A: Acidified aqueous potassium manganate(VII) should be stored in a cool, dry place, away from direct sunlight and heat sources. It should also be stored in a well-ventilated area to prevent the buildup of toxic fumes.

Conclusion

In conclusion, acidified aqueous potassium manganate(VII) is a purple solution that has many uses in chemistry and industry. It is a powerful oxidizing agent that can be used to disinfect and sanitize surfaces, as well as to catalyze chemical reactions. However, it can also be hazardous if not handled properly, and should be stored and handled with caution.

Key Takeaways

  • Acidified aqueous potassium manganate(VII) is a purple solution that has many uses in chemistry and industry.
  • The oxidation state of the manganese ion in acidified aqueous potassium manganate(VII) is +7.
  • Acidified aqueous potassium manganate(VII) can be hazardous if not handled properly.
  • It is recommended to handle acidified aqueous potassium manganate(VII) with caution and to wear protective gear.

Frequently Asked Questions

  • Q: What is the color of acidified aqueous potassium manganate(VII)? A: The color of acidified aqueous potassium manganate(VII) is purple.
  • Q: What is the oxidation state of the manganese ion in acidified aqueous potassium manganate(VII)? A: The oxidation state of the manganese ion in acidified aqueous potassium manganate(VII) is +7.
  • Q: How is acidified aqueous potassium manganate(VII) prepared? A: Acidified aqueous potassium manganate(VII) is prepared by dissolving potassium manganate(VII) in water and then adding a strong acid, such as sulfuric acid.

Further Reading

  • For more information on acidified aqueous potassium manganate(VII), see the article on "Acidified Aqueous Potassium Manganate(VII): A Purple Solution".
  • For more information on the compound potassium manganate(VII), see the article on "Potassium Manganate(VII): A Purple Solution".