what is the name of the ion Ti2(CrO4)3

The ions are titanium(III) and chromate. What you have, however, is not two ions; rather, a compound, titanium(III) chromate

Are you sure it is an ion? What is the ionic charge?

There are various forms of titanium chromate.

As Bob notes above it is necessary to indicate the oxidation state of the titanium as it can have +2, +3 and +4 oxidation state.

If the above is a neutral compound it would be titanium (III) chromate.

If, as you indcate, it is an ion then you are missing a charge on the ion. So possibilities might be:

[Ti2(CrO4)3]2-

which could be
bis(tetraoxochromato(VI))titanium (II)

[Ti2(CrO4)3]2+

bis(tetraoxochromato(VI))titanium (IV)

I am not sure of the stability of the various chromates, but I guess this is an academic naming exercise.

To determine the name of the ion Ti2(CrO4)3, we first need to understand the chemical formula. In this case, Ti2(CrO4)3 represents a compound that includes a titanium ion (Ti2+) and three chromate ions (CrO4^2-).

To name the compound, we start with the cation, which is the titanium ion (Ti2+). Titanium can form different ions, but in this case, it has a charge of +2 (Ti2+).

Next, we consider the anion, which is the chromate ion (CrO4^2-). The chromate ion is composed of one chromium atom (Cr) and four oxygen atoms (O). The charge of the chromate ion is -2 (CrO4^2-).

To form a neutral compound, we need to balance the charges. Since the titanium ion has a +2 charge and the chromate ion has a -2 charge, we can combine two titanium ions and three chromate ions to create a neutral compound.

Now we can assemble the name of the compound. The name of the compound is derived from the names of the ions it contains. The titanium ion is named "titanium," and the chromate ion is named "chromate." When we combine the two ions, we use numerical prefixes to indicate the number of each ion present.

In this case, since we have two titanium ions, we use the prefix "di-" before "titanium." Likewise, since we have three chromate ions, we use the prefix "tri-" before "chromate." Therefore, the name of the compound Ti2(CrO4)3 is "ditanium trichromate."

So, in conclusion, the ion Ti2(CrO4)3 is named "ditanium trichromate."