What is the primary oxidation state of manganese in MnO4-?

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Question: What is the primary oxidation state of manganese in MnO4-?

Options:

Correct Answer: +7

Solution:

In MnO4-, manganese has an oxidation state of +7.

What is the primary oxidation state of manganese in MnO4-?

What is the primary oxidation state of manganese in MnO4-?

Step 1: Identify the compound MnO4-. It consists of one manganese (Mn) atom and four oxygen (O) atoms.
Step 2: Know the common oxidation state of oxygen, which is -2.
Step 3: Calculate the total oxidation state contributed by the four oxygen atoms: 4 oxygen atoms × -2 = -8.
Step 4: The overall charge of the MnO4- ion is -1.
Step 5: Set up the equation for the oxidation state of manganese (let's call it x): x + (-8) = -1.
Step 6: Solve for x: x - 8 = -1, so x = -1 + 8, which gives x = +7.
Step 7: Therefore, the oxidation state of manganese in MnO4- is +7.

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