Determination of the Water of Hydration of Barium Chloride
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Put a ring on a ring stand. Place a clay triangle on the ring and use it to support a crucible and lid. Heat the crucible and lid in a strong Bunsen burner flame for 2 minutes to clean it. Allow the crucible to cool for a minimum of 5 minutes.
Mass the crucible and lid. Record. Add between 2.0 and 3.0 grams of barium chloride. Mass again. Heat strongly for 5 minutes. Allow the crucible to cool. Mass again. Calculate the formula for barium chloride.
- Mass of empty crucible and lid: ________
- Mass of crucible with barium chloride (before heating): ________
- Mass of barium chloride: ________
- Mass of crucible with barium chloride (after heating): ________
- Mass of water lost: ________
- Formula for hydrated barium chloride: ________
- Name of hydrated barium chloride: ________
Show work below:
Questions
How would each of the following affect the calculated number of water molecules per barium chloride unit? In each case, explain your answer.
A. You spilled some of the barium chloride on the balance pan as you were transferring it into the crucible.
B. Your crucible was dirty with a material that would vaporize at high temperatures and you failed to clean it before adding the barium chloride.
