A sample consists of one or more of the following salts: Calcium sulfate (CaSO4), Potassium hydroxide (KOH), Barium chloride (BaCl2) Using the video below, determine: Which compounds, if any, must be present in the sample? Which compounds, if any, must be absent from the sample? Which compounds, if any, are indeterminate (i.e. you are unable to determine if present or absent from what is shown in the video)?

A sample consists of one or more of the following salts: Calcium sulfate (CaSO4), Potassium hydroxide (KOH), Barium chloride (BaCl2) Using the video below, determine: 1. Which compounds, if any, must be present in the sample? 2. Which compounds, if any, must be absent from the sample? 3. Which compounds, if any, are indeterminate (i.e. you are unable to determine if present or absent from what is shown in the video)? Hint: When evaluating your unknown mixture, consider not only what the possible individual species do when in water (i.e. are they soluble or not) or when reacted with reagents, but also how they may react with each other. Video description: To a vial containing a small amount of fine, white crystals, room temperature deionized water is added. The vial is swirled and the fine, white crystals completely dissolve. To the same vial, a sodium phosphate solution is added and upon addition, a white precipitate is produced. Barium chloride (BaCl2) 1. Must be present. Calcium sulfate (CaSO4) 2. Must be absent. Potassium hydroxide (KOH) 3. Is indeterminate