The chromate ion has a charge of 2-. Its symbol is CrO42-.
The formula, including the charge, for a chromate ion is CrO4-1.
Ammonium ions have a charge of +1 and Chromate ions have a charge of -2. When these ions react, they form Ammonium Chromate; 2NH4CrO4
Sn(CrO4)2 Tin 4 means that the tin is a cation with a +4 charge. Chromate is a polyatomic ion with the formula (CrO4)-2. Since the tin ion has a +4 charge in this case, and the chromate ion has a -2 charge, there is a 1:2 ratio of tin ions to chromate ions.
The formula for Copper (II) Chromate is CuCrO4.The copper has a 2+ charge (Cu2+) and the chromate ion has a 2- charge ( (CrO4)2-).Since the charges balance each other out, therefore, we get CuCrO4.
The chemical formula of sodium chromate is Na2CrO4. The sodium cation is Na+ and the chromate anion is (CrO4)2-.
The formula for a chromate ion is CrO4-2, and its charge is -2.
The formula, including the charge, for a chromate ion is CrO4-1.
Ammonium ions have a charge of +1 and Chromate ions have a charge of -2. When these ions react, they form Ammonium Chromate; 2NH4CrO4
The charge is minus 2.
Sn(CrO4)2 Tin 4 means that the tin is a cation with a +4 charge. Chromate is a polyatomic ion with the formula (CrO4)-2. Since the tin ion has a +4 charge in this case, and the chromate ion has a -2 charge, there is a 1:2 ratio of tin ions to chromate ions.
The formula for Copper (II) Chromate is CuCrO4.The copper has a 2+ charge (Cu2+) and the chromate ion has a 2- charge ( (CrO4)2-).Since the charges balance each other out, therefore, we get CuCrO4.
CrO4-2
The chemical formula of sodium chromate is Na2CrO4. The sodium cation is Na+ and the chromate anion is (CrO4)2-.
That's sodium chromate. However, the correct formula would actually be Na2CrO4, because sodium is a +1 metal, and the chromate polyatomic has a -2 charge. Therefore it will require two sodium atoms.
The formula for potassium chromate is: K2CrO4. The formula provides the following information: there are two potassiums, 1 chromium, and 4 oxygens. It can also be inferred that the charge on the chromate polyatomic group is -2 to balance out the two +1 potassium cations.
Chromate salts are the salts containing the anion chromate (CrO4)2-.
The chromate ion is CrO42-