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Topic: What is the concentration of 2% starch?  (Read 2332 times)

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Offline Waffles7

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What is the concentration of 2% starch?
« on: February 10, 2017, 08:35:07 PM »
I am doing a lab report that asks what the concentration of 2% starch is and I do not know how to answer. please help. I think it was a 5ml solution if that helps. I do not know how to solve so I cannot provide any work. I measured the weight of one drop of starch (0.038g)
« Last Edit: February 10, 2017, 09:48:36 PM by Beejsterb »
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Offline Borek

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Re: What is the concentration of 2% starch?
« Reply #1 on: February 11, 2017, 03:32:28 AM »
Quote from: Beejsterb on February 10, 2017, 08:35:07 PM
what the concentration of 2% starch is

Please elaborate, as this question - as asked - doesn't make sense.

What is the length of a 1 meter rod?

How much does a 1 kg bag of sugar weigh?

What is the concentration of a 2% solution?
« Last Edit: February 11, 2017, 07:34:15 AM by Borek »
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Offline Babcock_Hall

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Re: What is the concentration of 2% starch?
« Reply #2 on: February 11, 2017, 09:36:59 AM »
I could be wrong about this, but I was under the impression that starch is a polymer of variable length (therefore, variable mass).  If that is true, I don't see how one could easily express its concentration in terms of molarity or molality.
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Offline AWK

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Re: What is the concentration of 2% starch?
« Reply #3 on: February 11, 2017, 09:58:39 AM »
Average molecular weight is used.
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