Call Now to Set Up Tutoring:

(888) 888-0446

GRE Subject Test: Chemistry : Boiling Point

Study concepts, example questions & explanations for GRE Subject Test: Chemistry

Create An Account

All GRE Subject Test: Chemistry Resources

1 Diagnostic Test 152 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #6 : Physical Chemistry

Two moles of sodium chloride (NaCl) are added to 1kg of a mystery solvent. The addition of the NaCl caused an increase of 6K to the solvent's boiling point.

Based on this information, what is the boiling constant for the solvent?

Possible Answers:

$k_{b}= 1.0\frac{K}{m}$

$k_{b} = 1.5\frac{K}{m}$

$k_{b} = 3.0\frac{K}{m}$

$k_{b}= 6.0\frac{K}{m}$

Correct answer:

$k_{b} = 1.5\frac{K}{m}$

Explanation:

In order to solve this problem, we can use the boiling point elevation equation: $\Delta T = k_{b}mi$ .

We know the temperature change, we can compute molality from the given information, and we know the van't Hoff factor (expected to be 2 in this scenario due to NaCl becoming 2 ions in solution). We can calculate the boiling point constant for the solvent.

$k_{b}= \frac{\Delta T}{mi}$

$m=\frac{mol}{kg}$

$k_{b} = \frac{6K}{(\frac{2moles}{1kg})(2)}$

$k_{b} = 1.5\frac{K}{m}$

Report an Error

Example Question #11 : Physical Chemistry

What is the boiling point of a solution composed of three liters of water and 50 grams of sodium chloride?

$K_{b_{H_2O}}=0.515\frac{^{\circ}C}{m}$

$\rho_{H_2O}=1\frac{g}{mL}$

The molar mass of sodium chloride is $58.45\frac{g}{mol}$ .

Possible Answers:

$100.15^{\circ}C$

$100.77^{\circ}C$

$100.29^{\circ}C$

$117.17^{\circ}C$

Correct answer:

$100.29^{\circ}C$

Explanation:

We can use the boiling point elevation equation in order to determine the new boiling point once the salt has been added:

$\Delta T = K_{b}mi$

Since sodium chloride will form two ions for each molecule in solution, the value for the van't Hoff factor will be 2. In addition, the mass of the water in the solution will be 3 kilograms, which can be determined by using the density of water.

$\Delta T = (0.515\frac{^{\circ}C}{m})(\frac{\frac{50g}{58.45\frac{g}{mol}}}{3 kg})(2)$

$\Delta T = 0.29^{\circ}C$

Since water boils at 100 degrees Celsius, this means that the final boiling point of the solution is 100.29 degrees Celsius.

Report an Error

View Tutors

Kimberly
Certified Tutor

University of Connecticut, Bachelor of Chemistry, Chemistry. University of Connecticut, Doctor of Philosophy, Organic Chemist...

View Tutors

Yongmao
Certified Tutor

Nankai University, Bachelor of Science, Chemistry. Washington University in St Louis, Doctor of Philosophy, Organic Chemistry.

View Tutors

Gregory
Certified Tutor

Pennsylvania State University-Main Campus, Bachelor of Science, Chemical Engineering. Carnegie Mellon University, Doctor of P...

All GRE Subject Test: Chemistry Resources

1 Diagnostic Test 152 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

MCAT Tutors in New York City, Statistics Tutors in Washington DC, ACT Tutors in Atlanta, Chemistry Tutors in Miami, GRE Tutors in Miami, Chemistry Tutors in San Francisco-Bay Area, Statistics Tutors in San Diego, Spanish Tutors in Dallas Fort Worth, Calculus Tutors in San Francisco-Bay Area, Statistics Tutors in Dallas Fort Worth

Popular Courses & Classes

GMAT Courses & Classes in Los Angeles, SSAT Courses & Classes in Houston, GMAT Courses & Classes in Miami, SSAT Courses & Classes in Phoenix, ACT Courses & Classes in San Francisco-Bay Area, LSAT Courses & Classes in Miami, Spanish Courses & Classes in Dallas Fort Worth, ACT Courses & Classes in Philadelphia, MCAT Courses & Classes in Houston, SAT Courses & Classes in Philadelphia

Popular Test Prep

SSAT Test Prep in San Francisco-Bay Area, ISEE Test Prep in San Francisco-Bay Area, GMAT Test Prep in Philadelphia, GMAT Test Prep in Los Angeles, SSAT Test Prep in New York City, GMAT Test Prep in Phoenix, MCAT Test Prep in New York City, ACT Test Prep in Philadelphia, SAT Test Prep in Seattle, SAT Test Prep in Denver

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

GRE Subject Test: Chemistry : Boiling Point

Study concepts, example questions & explanations for GRE Subject Test: Chemistry

All GRE Subject Test: Chemistry Resources

Example Questions

Example Question #6 : Physical Chemistry

Example Question #11 : Physical Chemistry

All GRE Subject Test: Chemistry Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: