化學問題[標準溶液]

2007-03-19 8:12 am

準備一種可溶鹽的標準溶液,下列哪項物品是不需的??
(1)移液管
(2)量筒
(3)容量瓶

回答 (4)

2007-03-19 10:29 am

準備標準溶液步驟係先將已知濃度O既濃溶液用(1)移液管轉移定量O既濃溶液到(3)容量瓶,再加水至刻度.
所以(1)同(3)都係需要O既,(2)量筒屬於不準確容器,所以不會參與製作標準溶液.

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2007-03-19 8:34 am

(2)量筒
standard solution is a solution that with known concentration, thus the mass of solute must be measured and dissolved in water

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2007-03-19 8:17 am

(3)容量瓶

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2007-03-19 8:16 am

(2)量筒
因為唔準確

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