Charter9Homework ± Calculating Percent Concentration , es e previous 8 of 10 nex

Question

Charter9Homework ± Calculating Percent Concentration , es e previous 8 of 10 next Policy lome ± Calculating Percent Concentration Part A ents The percent concentration of a solution is a ratio of the amounts of dissolved solute and solution, expressed as a percentage. The percent concentration of a solution can be written generally as Calculate the mass percent of a solution that is prepared by adding 320 g of NaOH to 326 g of H20 Express your answer numerically. Hints amount of solution tings Depending on the situation, a percent concentration might be calculated for mass/mass, volumelvolume, or mass/volume %(m/m) Submit My Answers Give Up Part B Calculate the massivolume percent of a NaCl solution in which 193 g of NaCl is dissolved in enough water to give a total volume of 1.13 L Express your answer numerically Hints 5:29 PM

Explanation / Answer

A)

(m/m)% = mass of NaOH * 100 / mass of solution

= 32.0*100/(32.0 + 326)

= 8.94 %

Answer: 8.94 %

B)

(m/v)% = mass of NaCl * 100 / volume of solution in mL

= 193*100/1130

= 17.1 %

Answer: 17.1 %

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