anonymous
  • anonymous
Need help!!! Please Describe how to prepare a 10.0% w/v solution of salt in water in a 100mL volumetric flask.
Chemistry
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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Cuanchi
  • Cuanchi
10.0 w/v means 10.0 g of solute in 100 mL of solution. see attachment
Ciarán95
  • Ciarán95
The weight/volume (w/v) percent measurement for the concentration of a solution can be found as follows: \[\[w/v% = \frac{ Weight of solute (g) }{ Volume of solution (ml) } \times 100\] It is essentially the fraction of our solution which is the solid solute we're trying to dissolve, compared to the amount of solvent present. So, if we have a 100 mL volumetric flask, we can measure out 100 mL of our solvent (i.e. prepare 100 mL of a solution). If we wanted this solution to be 10% w/v: \[\frac{ Weight~of~solute (g) }{ 100 mL } \times 100 = 10\] So, \[Weight~of~solute~(g) = \frac{ (100)(10) }{ 100 }\]
Ciarán95
  • Ciarán95
Sorry, the equation didn't seem to come out properly for me there: \[\frac{ weight }{volume} = \frac{ Weight~of~solute(g) }{ Volume~of~solvent(mL) }\times100\] This should tell us how much of our solute we need to add to our known amount of solvent, thus enabling us to describe how we would prepare our solution.

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Kash_TheSmartGuy
  • Kash_TheSmartGuy
@Jaynator495

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