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Chemical equilibria and redox equations Typeit

Target Level

Running Total

Attempt

1 of 3

Type the oxidation state of the specified element into the space provided for each of the compounds or ions below. Remember to include a '+' or '-' as appropriate. Fill all the spaces before clicking ‘Check Answers!’

1. sodium in NaCl -

2. oxygen in Al₂O₃ -

3. fluorine in MgF₂ -

4. aluminium in AlBr₃ -

5. oxygen in O₂ -

6. hydrogen in HF -

7. hydrogen in NH₃ -

8. oxygen in OF₂ -

9. sulfur in SO₃ -

10. phosphorus in PO₄³⁻ -

11. chlorine in ClF₃ -

12. oxygen in H₂O₂ -

13. carbon in CH₄ -

14. nitrogen in Li₃N -

15. calcium in CaCO₃ -

This is your 1^st attempt! You get 3 marks for each one you get right. Good luck!

Pass Mark

69%