Enter the oxidation number with the sign above each element
H2
OH^-
Mg^2+
CO3^2-
Learn the rules. Here is a site to help you. I'll be glad to check your answers.
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What is the name for the chemical formula Ba(CH3CO2)2 (all the numbers are smaller and at the bottom of the compound, I just do not know how to type them)
The compound you typed is named barium acetate. In the future, instead of piggy backing on another post, which usually results in your questions getting overlooked, please go to the top of the page, click on Ask a New Question, and type a your question. That will get quicker and better results.
To determine the oxidation number of each element in a compound or ion, you need to follow some general rules and guidelines. Here's how you can find the oxidation numbers for the given compounds:
For H2:
Since hydrogen (H) is in its elemental form, its oxidation number is always 0.
For OH^-:
The overall charge of the hydroxide ion is -1. Oxygen (O) usually has an oxidation number of -2 when it appears in compounds, so we assign -2 to oxygen. Since the hydroxide ion has a charge of -1, the oxidation number of hydrogen (H) can be determined by the following formula: -1 (-2) = +1. Therefore, the oxidation number of hydrogen in this case is +1.
For Mg^2+:
The overall charge of magnesium (Mg) ion is +2. In its compounds, the oxidation number of magnesium is always +2. Therefore, the oxidation number of magnesium in this case is +2.
For CO3^2-:
The overall charge of the carbonate ion is -2. Oxygen (O) usually has an oxidation number of -2 when it appears in compounds, so we assign -2 to each oxygen atom. The sum of the oxidation numbers of all the elements in the ion must be equal to the charge of the ion. Let's assign the oxidation number of carbon (C) as x. Applying the sum of oxidation numbers equation: x + 3(-2) = -2. Simplifying, we get x - 6 = -2. Solving for x, we find that the oxidation number of carbon is +4.
In summary, the oxidation numbers for each element are as follows:
- H2: H = 0
- OH^-: H = +1, O = -2
- Mg^2+: Mg = +2
- CO3^2-: C = +4, O = -2