In this first practical, the students will be synthesising calcium carbonate from calcium chloride dihydrate and sodium carbonate. Each group has an individual sample sheet which lists the additive and water they should use – your school will all use the same additive but each group has a different mass of the additive. One group will be making a control sample without an additive and one group should use tap water instead of distilled or deionised water.
In the second practical, the students will load their calcium carbonate samples into Kapton capillary tubes. It’s really important that there are no gaps in the capillary tubes, as this will impact the quality of the data we collect. Two Kapton capillaries should be filled with each sample. Once filled, the barcodes should be used to label the samples. Please make sure that the samples are labeled correctly – we will not be able to use them if they are mislabeled. Please see instructions below on how to label your sample and send it back to Diamond. The remaining powder sample should be put into a vial, securely sealed and the vial placed into the large resealable bag along with the small resealable bag containing the two capillaries and the completed worksheet.
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