Topic 6: Redox

Oxidation Numbers

100

What is the oxidation number of nickel in NiCO₃?

+2

200

Atoms have an oxidation number of zero in a 

single atom, di atomic molecule

300

Oxidation numbers are used to indicate the ___.

transfer of electrons

400

What is the oxidation number of phosphorus in the PO₄^3- ion?

+5

500

5. In a polyatomic ion, the algebraic sum of the oxidation numbers of all atoms is equal to ____.

the charge of the atom

Formulas

100

H₂, O₂ And N₂ has oxidation number of __.

0

200

The simplified version of the empirical formula for X₂Y₄Z₂  is...

XY₂Z

300

What is the empirical formula for copper II sulfate?

CuSO₄

400

Elements that are classified as metals tend to have ___ charge.

positive

500

What follows an element's symbol in a chemical formula to indicate the number of atoms of that element in one molecule of the compound?

subscript number

Writing Oxidation Numbers and Formulas

100

Write the oxidation number for the given element. Sulfur in H₂SO₄

+6?

200

Write the formula for the following compound. Silicon dioxide

What is SiO₂?

300

The empirical formula for Tin(IV) chromate is..

Sn(CrO₄)₂

400

Write the name of the following compound. Fe(NO₂)₂

iron(II) nitrite

500

Write the name of the following compound. N₂O₄

dinitrogen tetraoxide

Writing Oxidation Numbers

100

What are the oxidation numbers of the elements in H₂O₂ (peroxide)

+1, -1

200

Al₂(SO₄)₃ what is the oxidation number of Sulfur?

+4

300

What is the oxidation number of Cl in Cl₂O₇ 

+7

400

What is the oxidation number of copper(I) ion?

+1

500

Write the oxidation number of each atom. CO₃^2-

C: +4, O: 

Oxidation number

100

What is the oxidation number of Carbon in Pb(C₂H₅)₄?

-3

200

Na₂S₄O₆ what is the oxidation number of O?

-2

300

K₃[Fe(CN)₆] what is the oxidation number of C?

+2

400

HCl+NaOH→NaCl+H₂O

not redox

500

Zn+HCl→ZnCl₂+H₂

redox