Final answer:
The oxidation numbers for the given compounds are as follows:
- KCl: The oxidation number of K is +1 and the oxidation number of Cl is -1.
- CaCl₂: The oxidation number of Ca is +2 and the oxidation number of Cl is -1.
- Na2O₃: The oxidation number of Na is +1 and the oxidation number of O is -2.
- BP3: The oxidation number of B is +3 and the oxidation number of P is -3.
- Li2SO₃: The oxidation number of Li is +1, the oxidation number of S is +4, and the oxidation number of O is -2.
- Al₂O₃: The oxidation number of Al is +3 and the oxidation number of O is -2.
- Be(NO₃)₂: The oxidation number of Be is +2, the oxidation number of N is +5 (in NO₃), and the oxidation number of O is -2.
- CaBr₂: The oxidation number of Ca is +2 and the oxidation number of Br is -1.
- NaI: The oxidation number of Na is +1 and the oxidation number of I is -1.
Step-by-step explanation:
Here are the oxidation numbers for the given compounds:
1. KCl:
- The oxidation number of K is +1.
- The oxidation number of Cl is -1.
2. CaCl₂:
- The oxidation number of Ca is +2.
- The oxidation number of Cl is -1.
3. Na2O₃:
- The oxidation number of Na is +1.
- The oxidation number of O is -2.
4. BP3:
- The oxidation number of B is +3.
- The oxidation number of P is -3.
5. Li2SO₃:
- The oxidation number of Li is +1.
- The oxidation number of S is +4.
- The oxidation number of O is -2.
6. Al₂O₃:
- The oxidation number of Al is +3.
- The oxidation number of O is -2.
7. Be(NO₃)₂:
- The oxidation number of Be is +2.
- The oxidation number of N is +5 (in NO₃).
- The oxidation number of O is -2.
8. CaBr₂:
- The oxidation number of Ca is +2.
- The oxidation number of Br is -1.
9. NaI:
- The oxidation number of Na is +1.
- The oxidation number of I is -1.
These oxidation numbers indicate the charge that each atom in the compound carries. It helps us determine how electrons are transferred or shared in chemical reactions.