To write the percent Concentration as a conversion factor and to use the percent

Question

To write the percent Concentration as a conversion factor and to use the percent concentration as a conversion factor. The percent concentration of a solution can be written in several different ways, including the mass percent, the volume percent and the mass/volume percent The percent concentration of a solution can be used as a conversion (actor to determine reformation such as the amount of solute or amount of solution. For example, a 4% (m/m) solution means that there are 4 g of solute in 100 g of solution Therefore, a 4% solution (m/m) could be written as the Moving conversion factors 4g solute/100 g solution abs 100 g solution/4 g solute You have a solution that is 18 5% (v/v) methyl alcohol. If the bottle contains 1.60 L of solution, what is the volume (V) in meters of methyl alcohol? Express your answer with the appropriate units. V = _____ A 6 00 % (m/v) NaCl solution contains 36 9 g of NaCl. What is the total volume (V) of the solution in milliliters? Express your answer with the appropriate units. V = ______

Explanation / Answer

18.5 % = volume of methyl alcohol/total volume of solution×100%

So

Volume of methyl alcohol = volume of solution × 0.185

= 0.296 L

1 L =1000 mL

So methyl alcohol needed =296 mL

You would add enough water to 296 mL of methyl alcohol to make a total of 1.6 L of solution.

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