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Weigh a clean, empty evaporating dish and record the mass on the data sheet. Leaving the evaporating dish on the balance, add between 2 -
- Weigh a clean, empty evaporating dish and record the mass on the data sheet. Leaving the evaporating dish on the balance, add between 2 - 4 grams of the hydrate into the dish and re-weigh. Record the mass on the data sheet.
- Place the dish on a hot plate and heat (medium high heat) until the blue color is gone or mostly gone (avoid burning the sample). Remove dish with crucible tongs and set on a wire gauze to cool. After cooling, reweigh the evaporating dish with the anhydrous compound. Record the mass on the data sheet.
- Dispose of the anhydrous in the waste container in the hood. Empirical Formula of zinc chloride:
- Weigh a 100 mL beaker and record the mass on the data sheet.
- Add approximately 0.5 grams of zinc to the beaker, re-weigh, and record the mass on the data sheet.
- Measure 10 mL of 3 M HCI into a 10 mL graduated cylinder.
- Slowly add HCI to the beaker and stir. Stir and react for 5 minutes.
- Place the beaker on the hot plate (medium heat), occasionally stirring, careful
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