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7在實驗室稀釋濃硫酸,應以何種方式處理?(A)將水緩慢倒入裝有濃硫酸的燒杯中(B)將水先倒至杯中再緩慢倒入濃硫酸(C)同時將水跟濃硫酸緩慢倒入燒杯中(D)先倒少量濃硫酸到燒杯,再加入一些水,依此步驟交
問題詳情
7在實驗室稀釋濃硫酸,應以何種方式處理?
(A)將水緩慢倒入裝有濃硫酸的燒杯中
(B)將水先倒至杯中再緩慢倒入濃硫酸
(C)同時將水跟濃硫酸緩慢倒入燒杯中
(D)先倒少量濃硫酸到燒杯,再加入一些水,依此步驟交替進行
參考答案
答案:B
難度:簡單0.80303
統計:A(22),B(265),C(1),D(26),E(0)
用户評論
【
方雅錚
】評論
稀釋硫酸時,須將濃硫酸沿著玻棒緩緩倒入大量水中的燒杯,避免濃硫酸的脫水性,使溶液的反應激烈,導致突沸的危險。
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