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| Standardisation. Dissolve 0.120 g of zinc RV in 4 ml of hydrochloric acid R1 and add 0.1 ml of bromine water R. Drive off the excess of bromine by boiling, add dilute sodium hydroxide solution R until the solution is weakly acid or neutral and carry out the assay of zinc by complexometry (2.5.11).这句话中的zinc RV 是什么东西？？ |
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2楼2009-01-16 12:27:41
yxj0818
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3楼2009-01-16 13:43:52