Question 1043598: a chemistry student has 45 milliliters of a 20% salt solution. how many milliliters of salt are in the solution? Found 2 solutions by ikleyn, Edwin McCravy:Answer by ikleyn(52792) (Show Source):
You can put this solution on YOUR website! .
a chemistry student has 45 milliliters of a 20% salt solution. how many milliliters of salt are in the solution?
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Salt is a crystal solid body or a powder media.
And it is not measured in milliliters. It is measured in grams (grams of mass).
And the concentration, in this case, is (gram/gram) dimensionless measure.
So, if the solution is 45 gram in mass, then there is
= = = 9 gram of salt.
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Who gave you this problem ? Your teacher?
Say him/her that the amount of salt is measured in grams, not in milliliters.
I just answered this question in
https://www.algebra.com/algebra/homework/Trigonometry-basics/Trigonometry-basics.faq.question.1043564.html
If it is you who invented this question, then stop duplicate it.
The question doesn't make sense.
The next such post will be redirected to the SPAM section.
You're not spamming. This is a chemistry question more
than a mathematics question.
mL and cubic centimeters are both measures of volume.
The rule to remember about NaCl solutions is this:
If N grams of table salt NaCl is dissolved in enough water
to make 100 mL (total volume) of solution, then the salt
concentration is N%.
So since the table salt concentration is 20%, if there were 100 mL
of salt solution, then it would contain 20 grams of table salt.
But there are only 45 mL of table salt solution, so
So there are 9 grams of table salt in the solution.
The density of salt is 2.16 g/mL.
So the number of mL of salt is therefore 4.167 mL.
Edwin
