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Determination of the Hardness of Water, Kit Incl udes:4x500 ml EDTA Sol ution, 0.005M, 2x200 ml Buffer Sol ution, 2x15 ml EBT Sol ution (Eriochrome Bl ack, 0.1%) UN1219
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Mol e Ratio Chemistry Kit, Incl udes: Material s for 15 groups: 400g Sodium Thiosul fate, Anhydrous, 250ml Sodium Hypochl orite, 13% conc. UN1791, teacher fts guide, and student copy masters
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