Che 103 chapter3

In a compound fluorine always has an oxidation 3

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: r of zero. oxidation Examples: Mg(s) Hg(l) I2(s) O2(g) All have an oxidation number of zero (0) Oxidation Numbers 2. If an atom is charged, then the charge is the oxidation number. oxidation Examples: Ion Oxidation Number Mg2+(aq) +2 Cl−(aq) −1 Sn4+(s) +4 Hg2+ (aq) 2 +2/2 = +1 for each Hg atom Oxidation Numbers 3. In a compound, fluorine always has an oxidation 3. number of −1. number 4. Oxygen most often has an oxidation number of −2. 4. oxidation » *When combined with fluorine, oxygen has a positive O.N. » *In peroxide, the O.N. is −1. 5. In compounds, Cl, Br & I are −1 (Except with F 5. (Except and O present) and 6. In compounds, H is +1, except as a hydride 6. (H−: −1) (H Oxidation Numbers Examples: Compound Oxidation Numbers HF(g) H = +1 F = −1 H2O(l) H = +1 O = −2 OF2(g) O = +2 F = −1 Na2O2(s) Na = +1 O = −1 HCl(g) H = +1 Cl = −1 NaH(l) Na = +1 H = −1 Oxidation Numbers Most common oxidation numbers: Most Oxidation Numbers 7. For neutral compounds, the sum of the oxidation numbers equals zero. numbers For a poly atomic ion, the sum equals the charge. For the Examples: +2 + 2 × (−1) = 0 MgCl2 −3 + 4 × (+1) = +1 + 4 NH Oxidation Numbers Determine the oxidation number of iron in the oxidation following compound: ? + 3× (−1) = 0 Fe(OH)3 Iro...
View Full Document

This note was uploaded on 04/09/2014 for the course CHE 103 taught by Professor Moran during the Spring '07 term at West Chester.

Ask a homework question - tutors are online