布萊頓 發問時間: 科學化學 · 10 年前

莫耳濃度計算問題

1. how many grams of glucose must be weighed out to prepare 500ml of a 0.15M

glucose solution?

2. how many grams of glucose are there in 150ml of 0.25M glucose solution?

3. how many mole of glucose are in 5ml of 0.25M glucose solution?

4. what is the final concentration(uM) when 180mg of glucose are dissolved in a

total volume of 50ml?

1 個解答

評分
  • 10 年前
    最佳解答

    With molar mass of glucose = 180 g/mol

    a) No. of moles of glucose = 0.15 x 0.5 = 0.075, with weight = 0.075 x 180 = 13.5 g

    b) No. of moles of glucose = 0.25 x 0.15 = 0.0375, with weight = 0.0375 x 180 = 6.75 g

    c) No. of moles of glucose = 0.25 x 0.005 = 0.00125

    d) No. of moles of glucose = 0.18/180 = 0.001, with concentration = 0.001/0.05 = 0.02 M = 20000 uM

    參考資料: Myself
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