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【答案】应助回帖
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wuyao118: 金币+60, 翻译EPI+1, 谢谢 2012-04-21 19:52:09
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First of all, weighed 0.5 g of BiNO3 into the Erlenmeyer flask and add 10 mL of H2O to dissolve it as a clear solution ①, the concentration of x mol • L-1; Weigh of 0.2 g of NaOH in the beaker, add 2 mL of44 ° C distilled water and allowed to dissolve, and to a certain pH value adjusted with 2 mol • L-1 HCl solution, that was the solution ② The concentration of b mol • L-1; then, solution A into a separatory funneland slowly dropped into the conical flask of solution B, while magnetic stirring, namely green precipitate formed. Drops after the flask into a microwave oven, microwave heating at different times, respectively, in 20% of the fire under, and then remove the flask from the microwave, stirring for 15 min at room temperature. Sedimentation centrifuge, in a thermostatic oven dried at 55 ℃ for 3 h. |
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