2#
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小 發表於 2012-4-22 03:33 PM (第 2189 天)
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這問題牽涉 Cu+ @@ copper (I) ion
2Cu2+ +4I- >>2CuI + I2
the molarity of iodine released from reaction between copper (II) sulphate and potassium iodide can be found
by known volume of standard S2O3 2- using starch indicator...complete disappearance of blue black color
marks the end point
the purity of CuSO4 can be found by molarity of iodine using mole concept in terms of mol dm-3