We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

High School Chemistry : Help with Concentration Units

Study concepts, example questions & explanations for High School Chemistry

Create An Account

All High School Chemistry Resources

6 Diagnostic Tests 143 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : Concentration And Units

What is the concentration of Ca in a solution of 1 mol CaCl2 in 1 L of distilled water? (M = molarity, m= molality)

Possible Answers:

2 M

1 M

2 m

1 m

Cannot be determined

Correct answer: 1 m

Explanation:

The definition of molality is moles of solute in 1 kg of the solvent, whereas molarity is the number of moles of solute per 1 L of solutioin. Since 1 mol of CaCl2 is added to 1 L of water, this means that the volume of the final solution is greater than 1 L. Thus, molality is the more accurate concentration determinant, since the solution is probably close to 1 L.

Report an Error

Example Question #1 : Concentration And Units

Which of the following is equivalent to molarity?

Possible Answers:

Moles of solute per liter of solution

Moles of solute per kilogram of solvent

Kilograms of solute per mole of solution

Moles of solute per liter of solvent

Correct answer:

Moles of solute per liter of solution

Explanation:

Molarity, molality, and normality are the three principle ways to measure concentration. Molarity is a measure of moles of solute per liter of solution. Molality is a measure of moles of solute per kilogram of solvent. Normality expressly relates to acids and bases, and is the measure of moles of solute divided by the number of hydrogen equivalents per mole, all divided by liters of solution. Normality is also referred to as "equivalents (of acid) per liter."

Report an Error

Example Question #1 : Help With Concentration Units

How many moles of HCl are in of a 0.1M solution?

Possible Answers:

1.0 mol

2.5 mol

10.0 mol

0.5 mol

5.0 mol

Correct answer:

0.5 mol

Explanation:

Molarity is defined as moles of solute divided into liters of solution. We can set up the equation as follows:

$0.1M = \frac{x}{5 L}$

Set the left side of the equation over and solve as a proportion.

$\frac{0.1M}{1} = \frac{x}{5 L}$

Cross multiply.

1x=0.1M*5L

Remember molarity is defined as moles of solute per liter of solution.

$M=\frac{mol}{L}$

Substiute.

$x=\frac{0.1mol}{L}*\frac{5L}{1}$

Liters cancel out.

x=0.5mol

Solve for the number of moles. This gives us 0.5 mol of solute in a 0.1 M , solution of HCl .

Report an Error

Example Question #1 : Help With Concentration Units

Which of the following units is common for measuring concentration?

Possible Answers:

$\frac{mol}{L}$

$\frac{kg \cdot m}{s^2}$

mmHg

atm

$\frac {kg}{m^3}$

Correct answer:

$\frac{mol}{L}$

Explanation:

$\frac{mol}{L}$ is the dimensional breakdown for the commonly used unit , or molarity, for concentration.

While the other units might be seen in chemistry, they are used for other topics.

Millimeters of mercury (mmHg) and atmospheres (atm) are seen in regards to pressure.

$\frac {kg}{m^3}$ is the dimensional breakdown for density. And $\frac{kg \cdot m}{s^2}$ is the dimensional breakdown for a Newton, also written as N. This is associated with force.

Report an Error

View Tutors

Tahir
Certified Tutor

Youngstown State University, Bachelors, Biology, General. Youngstown State University, Masters, Public Health.

View Tutors

David
Certified Tutor

Universidad Central de Venezuela, Bachelors, Chemistry. Baylor University, PHD, Chemistry.

View Tutors

Rebecca
Certified Tutor

University of California-San Diego, Current Undergrad, Bioengineering .

All High School Chemistry Resources

6 Diagnostic Tests 143 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

Chemistry Tutors in Seattle, LSAT Tutors in Philadelphia, GRE Tutors in San Diego, Computer Science Tutors in Phoenix, Calculus Tutors in New York City, Spanish Tutors in Atlanta, Physics Tutors in Philadelphia, French Tutors in Phoenix, Computer Science Tutors in New York City, Physics Tutors in Atlanta

Popular Courses & Classes

SAT Courses & Classes in Washington DC, SAT Courses & Classes in Boston, ISEE Courses & Classes in New York City, ISEE Courses & Classes in San Francisco-Bay Area, LSAT Courses & Classes in Los Angeles, MCAT Courses & Classes in Miami, ACT Courses & Classes in San Diego, SSAT Courses & Classes in Phoenix, LSAT Courses & Classes in San Diego, GMAT Courses & Classes in Seattle

Popular Test Prep

LSAT Test Prep in Seattle, SAT Test Prep in Chicago, LSAT Test Prep in Philadelphia, ISEE Test Prep in San Diego, ACT Test Prep in San Diego, SSAT Test Prep in San Diego, SSAT Test Prep in Philadelphia, SAT Test Prep in San Diego, GMAT Test Prep in Philadelphia, LSAT Test Prep in Miami

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

High School Chemistry : Help with Concentration Units

Study concepts, example questions & explanations for High School Chemistry

All High School Chemistry Resources

Example Questions

Example Question #1 : Concentration And Units

Example Question #1 : Concentration And Units

Example Question #1 : Help With Concentration Units

Example Question #1 : Help With Concentration Units

All High School Chemistry Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: