What is the oxidation forumla of HgCl?

Question

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Answer 1

This lesson will concentrate on writing simple chemical formulas when given a formula name. In learning how to write chemical formulas, you will make use of the oxidation numbers that you learned about in lesson 5-2. For your convenience, print out the tables from lesson 5-2 before you continue with this lesson, as they will be referred to from time to time.

Writing Ionic Formulas

I. Binary Compounds - Binary compounds are compounds that are composed of only two elements. When you write the formulas for binary compounds, they will consist of two elemental symbols, and they may also have one or two subscript numbers, if the elements don't combine in a one to one ratio. You are probably familiar with the formula NaCl for table salt. This formula shows no subscripts because one ion of Na will be present for each ion of Cl, in any sample of table salt.

You will be given the name of a binary compound and you will be expected to be able to write the proper formula for the compound. There will be two sources of information for writing the correct formula. The compounds name will give you the elements that make up the compound. The oxidation numbers of the ions involved will show you the ratio by which they combine. Let's go through an example;

Example 1. Write the correct formula for Barium Fluoride.

Step one - Write the symbols for the elements in the compound. If you need to review the elemental symbols, see lesson 5-1. Note that the ending "ide" is used for fluoride to show that it is a negative ion of fluorine.

Barium = Ba Fluoride = F

Step two - Look up the oxidation numbers of the elements involved (in table 5-2b or some similar table), and write them as superscripts to the right of the elemental symbols. Note that when no number accompanies a charge symbol, as in the case of fluoride below, they charge value is understood to be "1".

Answer 2

There is no such compound as HgCl. The only mercury chlorine compounds are Hg2Cl2 and and HgCl2.

Answer 3

Cl 26.12 -1 [Ne].3s2.3p6
Hg 73.88 2 [Xe].4f14.5d10
Synthesis