Write the formula of the corresponding acid that contains this anion.
Express your answer as a chemical formula.
The arsenite ion has the formula AsO33−.
To find the formula of the corresponding acid that contains the arsenite ion (AsO33-), we can use the following steps:
Step 1: Identify the central atom.
In this case, the central atom is arsenic (As).
Step 2: Determine the oxidation number of the central atom.
The oxidation number of the arsenic atom can be calculated by balancing the charges in the formula of the arsenite ion (AsO33-). The sum of the oxidation numbers must equal the overall charge (-3).
Oxygen atoms (O) usually have an oxidation number of -2, so we have: 3(Oxidation Number of Oxygen) = -6.
The overall charge of the arsenite ion is -3, so the oxidation number of arsenic (As) must be +3 to balance the charges.
Step 3: Write the formula of the acid.
The formula of the corresponding acid will have the same central atom (arsenic) but will contain hydrogen (H) ions to balance the charge.
Considering the oxidation number of arsenic (+3) and the presence of hydrogen, the formula of the corresponding acid is H3AsO3.