oxidation state of chromium in K³CrO³ is

To determine the oxidation state of chromium in K₃CrO₃, we need to consider the charges of the other elements involved.

1. Start by assigning the oxidation state of oxygen (O) as -2. This is a common assumption for most compounds unless otherwise specified.

2. Since potassium (K) is a Group 1 element, it has an oxidation state of +1.

3. Let's assume the oxidation state of chromium (Cr) as x.

4. The compound K₃CrO₃ has a neutral charge, so the sum of the oxidation states must equal zero.

5. We have three potassium ions, each with an oxidation state of +1, so the total contribution from potassium is +3.

6. We have three oxygen ions, each with an oxidation state of -2, so the total contribution from oxygen is -6.

7. The oxidation state of chromium can be calculated by setting up the equation: (+3) + x + (-6) = 0.

8. Simplifying the equation, we have: x - 3 = 0.

9. Solving for x, we find that the oxidation state of chromium (Cr) in K₃CrO₃ is +3.

Therefore, the oxidation state of chromium in K₃CrO₃ is +3.