3.51 Solution Concentration
Q:A 1000 mL container of brand A juice drink contains 250 mL of juice and 750 mL of water. A 600 mL
container of brand B juice drink contains 200 mL of juice and 400 mL of water. Which brand of juice drink is
more concentrated, brand A or brand B?
A:Concentration(A) =1000 mL250 mL×100%=25%
Concentration(B) =200 mL600 mL×100%=33%
You can conclude that brand B is more concentrated.
At the following URLs, you can learn how to solve concentration problems that are a little more challenging.
http://www.youtube.com/watch?v=RCbhk3yyM88
http://www.youtube.com/watch?v=dHxXtkH8ILs
Summary
- The concentration of a solution is the amount of solute in a given amount of solution. A concentrated solution
has more solute in a given amount of solvent than a dilute solution. - The concentration of a solution can be calculated with this formula:
Concentration=MassMass(or volume(or volume))of Solutionof Solute ×100%Vocabulary
- concentration: Number of particles of a substance in a given volume, or ratio of solute to solution in a
solution.
Explore More
At the following URL, solve problems 1–6. You can check your answers at the end of the worksheet. http://instruct.
westvalley.edu/harrison/chem30A/worksheets/soultionsworksheet.pdf
Review
- What is the difference between a dilute and a concentrated solution?
- What is the concentration of a 500 mL solution that contains 5 mL of solute?
- James mixed added 25 grams of solute with 75 grams of solvent. Then he calculated the concentration of the
solution as:
Concentration(B) =25 g75 g×100%=33%
What error did James make in his calculation? What is the correct concentration of this solution?