怡螢 發問時間: 科學化學 · 2 0 年前

如何計算誤差百分比?

1. Calculate the percentage error arising in an experiment when 1ml, 5ml, and 10ml pipets are for transfer and each pipet contains 5 drops of water adhering to the inside of the barrel. A single drop of water has an approximate volume of 0.05ml.

2. If a 0.5ml air bubble is present in the tip of a buret, what percent error in 10ml, 20ml, and 40ml samples will result if air bubble is dislodged during the dispensing of the samples?

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1 個解答

評分
  • Frank
    Lv 7
    2 0 年前
    最佳解答

    1. 5 滴水的體積= 5 * 0.05 = 0.25 ml ,則百分誤差分別為: 在 1ml 的量管百分誤差= 0.25/1 = 25% 在 5ml 的量管百分誤差= 0.25/5 = 5% 在 10ml 的量管百分誤差= 0.25/10 = 2.5%2. 0.5ml 的氣泡存在於量管的頂端所產生的百分誤差分別為: 在 10ml 的樣品所產生百分誤差= 0.5/10 = 5% 在 20ml 的樣品所產生百分誤差= 0.5/20 = 2.5% 在 40ml 的樣品所產生百分誤差= 0.5/40 = 1.25% 

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