Dilution factor?

👨🏻‍🏫 學術台化學

[匿名]

2016-05-30 5:02 pm

更新1:

what is the dilution factor you dissolve a compound of unknown mass in 5ml of water and then extract 1ml of the solution and dilute the 1ml until 10ml mark. what is the dilution factor?

回答 (2)

fooks

2016-05-30 6:57 pm

Note that the 5 mL of water is not diluted. Only 1 mL of the extract is diluted to 10 mL.

The dilution factor is 1/10.

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[匿名]

2016-05-30 5:24 pm

1/5 * 1/10 = 1/50.

The dilution factor is

the reciprocal: 50.

Why 50? Imagine that the

original mass in the 5 mL

was 50 mg. You take 1/5 of

this as you've taken I mL

of the original 5 mL:

50 mg * 1/5 = 10 mg.

1 mL contains 10 mg.

1 mL made up to 10 mL

constitutes a 1/10 dilution.

10 mg * 1/10 = 1 mg.

Dilution factor = 50/1 = 50.

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