finger

in steemstem •  7 years ago  (edited)

finger

steemstem
7 years ago by

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    • [-]
      ·  7 years ago 

    Great post! But your apparatus seemes unsave:
    Its just hold by one clamp, no use of hose clamps, the thermometer is completely loose...
    a safety hazard!!! ;)

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      [-]
        ·  7 years ago 

      haha actually its impossible/impraticle to clamp everything. Just make sure everything can hold safely then we will just leave it. In this case, we have a B14 ground glass joint from the flask holding the cold finger, so clamping the round bottom flask neck actually holds the cold finger quite nicely(by gravity lol).
      The thermometer is somewhat hanging haha, but I used to take it away once the temperature is stable.
      Its true that lab safety is important XDD

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        [-]
          ·  7 years ago 

        不会用多了氨吸热气化了吗？

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          [-]
            ·  7 years ago 

          會的啊，所以要用乾冰-丙酮冷凍液把接收的液態氨冷凍著保持在液體狀態(圖中下面銀色反光的就是保溫瓶放著冷凍液) XD

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            [-]
              ·  7 years ago 

            我意思是乾冰-丙酮冷凍液，不会气化吗？毕竟是常温下呀。

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              [-]
                ·  7 years ago 

              哈哈，會的啊，所以要不斷添乾冰的啊!!XDD

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