The question is: the arsenate ion has the formula AsO4^3-. Write the formula of the corresponding acid that contains this anion. I don't really understand what I need to do. please help!
You're supposed to write the acid. For example, the acid of Cl^- is HCl. The acid of SO4^2- is H2SO4.
Therefore, the acid for AsO4^3- is H3AsO4.
Thank you for your help.
H2AsO4-
Sure! To determine the formula of the corresponding acid for a given anion, you need to look at the charge of the anion. In this case, the arsenate ion (AsO4^3-) has a charge of -3.
To write the formula of the corresponding acid, you need to first remove the negative charge of the anion and replace it with hydrogen ions (H+). The number of hydrogen ions you add should be equivalent to the absolute value of the charge of the anion.
In this case, since the anion has a charge of -3, you would add 3 hydrogen ions to the formula. The hydrogen ions will combine with the oxygen atoms in the anion.
Therefore, the formula of the corresponding acid for the arsenate ion is H3AsO4.