December 11, 2024, 08:46:43 AM
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Topic: help with question on serial dilutions with ethanol  (Read 829 times)

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cecing

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help with question on serial dilutions with ethanol
« on: November 14, 2024, 02:38:04 PM »
so the question is: You choose to make a serial dilution of alcohols ie. to make the 2nd dilution from the 1st.  In order to end up with 140mL of 82% AND 52mL of 51%, how many mL of absolute ethanol do you need to make up the 1st solution? (answers to 2 d.p.)

I've never really done these kinda of questions with alcohol involved so i think its the percentages that are throwing me off and i'm kinda confused what the question is asking. how do i go about solving this?

Offline Borek

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Re: help with question on serial dilutions with ethanol
« Reply #1 on: November 14, 2024, 05:50:36 PM »
Hint: dilutions don't matter here.
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