Given 1.00 g of an unknown sulfate salt, ASO 4 , the following steps are performed: 1. The salt is dissolved in water 2. An excess of BaCl 2 is added resulting in the formation of a precipitate 3. The sample is washed and dried. The mass of the precipitate is determined to be 1.45 g We can write the following chemical equation to represent steps 1 & 2 ASO 4 (aq) + BaCl 2 (aq) → BaSO 4 (s) + ACl 2 (aq) What is the identity of the cation A?