A-LevelChemistryAnalytical techniquesFeb/Mar 2022Paper 5 Q19 Marks
A student has a sample of copper(II) sulfate crystals, CuSO₄•xH₂O. The student wants to show that the value of x is 5. The student uses the following method. step 1 Weigh a clean crucible on a balance reading to two decimal places. Record the mass. step 2 Place the sample of CuSO₄•xH₂O into the crucible. Record the mass. step 3 Heat the crucible gently for about 1 minute then strongly for about 4 minutes. step 4 Weigh the crucible and contents. Record the mass.
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