What is the oxidation state of manganese in KMnO4?
Practice Questions
Q1
What is the oxidation state of manganese in KMnO4?
+2
+4
+6
+7
Questions & Step-by-Step Solutions
What is the oxidation state of manganese in KMnO4?
Correct Answer: +7
Step 1: Identify the chemical formula, which is KMnO4.
Step 2: Recognize that KMnO4 consists of potassium (K), manganese (Mn), and four oxygen (O) atoms.
Step 3: Know the oxidation state of potassium (K), which is +1.
Step 4: Know the oxidation state of oxygen (O), which is usually -2.
Step 5: Calculate the total oxidation state contributed by the four oxygen atoms: 4 oxygen atoms × -2 = -8.
Step 6: Set up the equation for the total oxidation states in the compound: +1 (from K) + x (from Mn) + (-8) (from O) = 0, where x is the oxidation state of Mn.
Step 7: Simplify the equation: +1 + x - 8 = 0.
Step 8: Solve for x: x - 7 = 0, so x = +7.
Step 9: Conclude that the oxidation state of manganese (Mn) in KMnO4 is +7.
