Share/Like This Page
Print Instructions

NOTE: Only your test content will print.
To preview this test, click on the File menu and select Print Preview.




See our guide on How To Change Browser Print Settings to customize headers and footers before printing.

Calculations of Concentrations (Grades 11-12)

Print Test (Only the test content will print)
Name: Date:

Calculations of Concentrations

1. 
Which of the following correctly represents the equation for the molarity of a solution?
  1. [math]molarity={"moles of solute"}/{"moles of solvent"}[/math]
  2. [math]molarity={"moles of solvent"}/{"moles of solution"}[/math]
  3. Both (a) and (b)
  4. [math]molarity={"moles of solute"}/{"moles of solution"}[/math]
2. 
Which of the following correctly represents the equation for parts per million?
  1. [math]"parts per million" = {mass of solute}/{mass of solvent} xx 1000000[/math]
  2. [math]"parts per million" = {mass of solute}/{mass of solution} xx 1000000[/math]
  3. [math]"parts per million" = {mass of solvent}/{mass of solute} xx 1000000[/math]
  4. [math]"parts per million" = {mass of solvent}/{mass of solution} xx 1000000[/math]
3. 
What is the molarity of 138 g NaOH dissolved in 4000 mL of water?
  1. 0.8625 M
  2. 1.725 M
  3. 3.45 M
  4. 6.90 M
4. 
What is the molarity of 6 moles of sodium chloride dissolved in 450 mL of solution?
  1. 75 mol/L
  2. 13.3 mol/L
  3. 0.013 mol/L
  4. 133.3 mol/L
5. 
What is the molality of 75 g of [math]CaO[/math] dissolved in 1680 g of water?
  1. 0.045 molal
  2. 44.64 molal
  3. 446.4 molal
  4. 4.43 molal
6. 
A 560-gram sample of solution contains 44 g of lithium chloride. What is the concentration in parts per million?
  1. 78.571 ppm
  2. 78571 ppm
  3. 785.71 ppm
  4. 7857.1 ppm
7. 
A 620-gram sample of gas has 200 g of xenon. What is the percent composition of xenon in this gas sample?
  1. 25%
  2. 32.3%
  3. 3.1%
  4. 31%
8. 
What is the molality of 4 moles of potassium nitrate dissolved in 240 g of water?
  1. 16.7 molal
  2. 60 molal
  3. 0.0167 molal
  4. 1.67 molal
9. 
32.5 g of hydrated oxalic acid is dissolved to get 1.5 [math]dm^3[/math] of solution. Calculate the normality of the solution.



10. 
A 597-g sample of a metal alloy contains 12.6 grams of copper. What is the percent composition of copper in this metal alloy?



Become a Help Teaching Pro subscriber to access premium printables

Unlimited premium printables Unlimited online testing Unlimited custom tests

Learn More About Benefits and Options

You need to be a HelpTeaching.com member to access free printables.
Already a member? Log in for access.    |    Go Back To Previous Page