Share/Like This Page
Browse Printables
Print Instructions

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

Click here to print this test!
Click here to save or print this test as a PDF!
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. 
Determine the molarity of 69 g of NaOH dissolved in 2 L of solution.
  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 25 g of [math]Na_2O[/math] dissolved in 560 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 1240-g sample of gas contains 400 g of helium. What is the percent composition of helium in this 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.
Join for FREE »
Already a member? Log in for access.    |    Go Back To Previous Page