Now recall that mass percent is the percentage of a given solute in grams within a solution, also in grams. And what we can understand is that additionally, we can use mass/volume and volume percent formulas to express solution concentrations. Now here, we're going to deal with what we call mass volume, abbreviated as m/v percent concentration. We're gonna say this represents a percentage of a given solute in grams dissolved in a given volume in milliliters of solution. So that means that our m/v formula equals grams of our solute divided by milliliters of solution times 100%. This will allow us to calculate the mass volume percentage for any given solution.
Percent Concentrations - Video Tutorials & Practice Problems
Percent Concentrations deal with the amount (in mass of volume) of solute found within a given solution.
Mass and Volume Concentrations
Percent Concentrations Concept 1
Video transcript
Percent Concentrations Example 1
Video transcript
A solution was prepared by dissolving 13.5 grams of potassium nitrate in sufficient water to produce 85 ml of solution. What is the mass volume percentage of this solution? Alright. So we're going to say here mass volume percentage equals the grams of our solute divided by milliliters of our solution times 100%. Here our solute is potassium nitrate, so that's 13.5 grams of potassium nitrate divided by the ml of solution, which is 85, times 100%. When we do that we get 15.9% as our final answer. Here, the answer has 3 significant figures because both 13.5 and 85.0 also have 3 significant figures.
Percent Concentrations Concept 2
Video transcript
With volume volume percentages, we say it represents a percentage of a given solute in milliliters dissolved in a given volume of milliliters for a solution. That means that our volume volume percentage, so volume volume is abbreviated as v/v percentage equals the ml's of solute divided by the ml's of solution times 100%.
v / v % = ml solute ml solution × 100 %
Percent Concentrations Example 2
How many mL of ethanol are contained in a 750.0 mL bottle of wine that contains 11.0% (v/v) of ethanol?
Calculate the grams of solute needed to prepare the following:450 mL of a 2.0% m/v KOH solution.
What is the mass/volume percent concentration of the following solutions:0.075 mol sucrose (C12H22O11) in 270 mL of solution.
The pain reliever ibuprofen is sold as an oral suspension for children 2-11 years of age. How many milligrams would you obtain in a 2.7 tsp dose if it contains 100 mg per 5 mL? (1 tsp = 5 mL)
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