Explore BrainMass
Share

Explore BrainMass

  1. Chemistry
  2. Physical Chemistry
  3. Oxidation-Reduction and Electrochemistry
  4. 32677

Compound Formula

Write the formula for these compounds:
a) potassium sulfide
b) iodine heptafluride
c) iron(III)chromate

© BrainMass Inc. brainmass.com July 18, 2018, 1:14 am ad1c9bdddf

Solution Preview

Hello and thank you for using BrainMass!

Sulfide is a a combination of Sulfur atom(s) with oxidation number -2 with other elements.

Potassium is an alkali metal with one electron in the outer shell, Thus it has an oxidation number +1 (it is very happy to donate this electron)

To balance the compound (having total oxidation number 0) we need one sulfur (-2) and two potassiums (+1)

Thus (underscore denotes a subscript):

potassium sulfide is K_2S (metal first).

Iodine and Fluor are ...

Solution Summary

The solution includes explanation and chemical formula. The solution is 285 words.

$2.19

Related BrainMass Content

interest rate, compound amount and loans

... for 5 years with 6% interest compounded semiannually ... of a regular savings account
earning compound interest is ... rate, n is the number of compounding periods per ...