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Hydrate Lab Answers. Detailed calculations shown Accurate data recorded (5 ± 0.3) Correct calculation for water lost Q1 - Moles of water lost Q2 - moles of anhydrous salt (159.61 g/mol) Q3 - 5 Q4 - CuSO 4 ·5H 2 O Q5 - copper(II) sulfate pentahydrate

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hydrate lab answers
Hydrate Lab Answers
  • Detailed calculations shown
  • Accurate data recorded (5 ± 0.3)
  • Correct calculation for water lost
  • Q1 - Moles of water lost
  • Q2 - moles of anhydrous salt (159.61 g/mol)
  • Q3 - 5
  • Q4 - CuSO4·5H2O
  • Q5 - copper(II) sulfate pentahydrate
  • Q6 - Turned back to blue, hydrate reforms
  • Significant digits (kept enough, kept exact)
sample calculations
Sample Calculations

hydrate: 2.82 g anhydrous: 1.80 g water: 0.98 g

  • 1.02 g ÷ 18.0 g/mol = 0.05666 mol
  • 1.80 g ÷ 159.61 g/mol = 0.01128 mol
  • 0.05666 mol ÷ 0.01128 mol = 5.02
  • CuSO4·5H2O
  • copper(II) sulfate pentahydrate
  • The colour turned back to blue when water was added, indicating that the hydrate reformed.

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