Mass Percent of a Solution Made Easy: How to Calculate Mass % or Make a Specific Concentration

This is a whiteboard animation tutorial on how to solve Mass Percent calculations for solutions.
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The Mass Percent of a solution is equal to the grams of solute per 100 grams of solution. The formula is:
Mass Percent = ((mass of solute) / (mass of solution)) x 100%
This equation may be rearranged to solve for any one of those three variables. The mass may be in any mass units as long as the mass units are consistent with each other. It is also useful to realize that the density of water is approximately 1 g/mL, so volumes of water in mL are equal to masses in grams.
In this video, I also describe how to make a solution of a certain mass percent.
Please see my related video on molarity:
• Molarity Made Easy: Ho...
My goal is to make chemistry easier ;)
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glad it helped!

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yeah ur right my teacher just showed me a bunch of numbers on a paper without a label

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you can ;)

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[@ketzbook]

you're welcome!

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[@karinadamo5949]

Can you compute mass of the solute given the mass of the solvent and mass percentage?

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[@abirami.p957]

why you have used mass of solution=mass of solvent+ mass of solute in example 2 alone and not in example 1... can u explain...

[@varadasrivastava7610]

been an year since op posted but still, in example 1 we were given the volume of the whole solution while in example 2 we were given volume for the solute and the solvent. A solute and a solvent combine to make a solution which is what is asked of us in the formula. That's why we add the solute and solvent in the second example and not in the first :))

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why in one problem u used the mass of solution as given in question 1 and in question 2 u added mass of solute nd solvent

[@ketzbook]

mass of solution = mass of solute + mass of solvent

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😊

[@orianaaaa]

Ketzbook ummm I have a question and I hope it will be answerd (sorry for killing the Thankful mood of this comment section but like most of the others here this vid really and TOTALLY helped me too so I'm thankful like them too), ok so in calculating the mass of a solute what formula or what should you do to get the mass of the solute if the mas of the solution wasn't given? Please pleeeeeeeeeeeeeaaaaaaaaase answer I'm having a totally hard time understanding my teachers solution so Pleaaaaaaaaaaase tell me what to do when the mass of the solute isn't given.
This is the problem that is quite similar to the one I need to solve just so you know what I mean
A solution is prepared by dissolving a certain amount of solute in 500 g of water. The percentage by mass of a solute in a solution is 2.38. Calculate the mass of solute

[@ketzbook]

I thought I did one like this. x = mass of solute
x / (500 + x) = 0.0238

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I was wondering if he ever talks about molality?

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love the stereotypes...but this is not a maths video, in case you didn't realize.

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