The normal boiling point of water, H2O is 100.00 °C and its Kbp value is 0.512 °C/m. Assuming complete dissociation of the electrolyte, if 13.47 grams of cobalt(II) chloride (CoCl2, 129.8 g/mol) are dissolved in 150.7 grams of water, what is the boiling point of the solution? Answer: ____ °C

Asked Sep 4, 2019

The normal boiling point of waterH2O is 100.00 °C and its Kbp value is 0.512 °C/m. 

Assuming complete dissociation of the electrolyte, if 13.47 grams of cobalt(II) chloride (CoCl2129.8 g/mol) are dissolved in 150.7 grams of water, what is the boiling point of the solution? 

Answer: ____ °C


Expert Answer

Step 1

The elevation in boiling point can be calculated as follows,


13.47g is converted into kilograms =0.01347kg of cobalt (II) chloride.

150.7g is converted into kilograms =0.1507kg of water.

The number of moles of cobalt (II) chloride in 1 kg of the solution is:

(129.8 g.mal0.1037 moles

Image Transcriptionclose

(13.47g) (129.8 g.mal0.1037 moles

Step 2

The molality of cobalt (II) chloride in 1kg of the solution can be calculated as:

(0.1037шо) - 0.6881 molal

Image Transcriptionclose

(0.1037шо) - 0.6881 molal (0.1507kg)

Step 3

The boiling point elevation constant of water is 0.512 oC.m/molal. Since cobalt (II) chloride dissociates into 3 ions, the Van’t Hoff factor for this compound is 3. Therefore, the boiling point elevation (ΔTb) can be calculated as follows:


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Physical Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you

Show more Q&A add

Q: a sealed rigid vessel is filled with helium. at room temperature (25 degrees Celcius), the pressure ...

A: An ideal gas is that which obeys the iodeal gas equation at all temperatures and pressure.The Ideal ...


Q: What is the lewis structure for sodium bicarbonate?

A: The lewis structure for sodium bicarbonate is given below.


Q: Convert this energy, 2.64 X 105 J to calories

A: Generally, one calorie is equal to 4.184 joules. Hence, one joule is 1/4.184 calories. The given amo...


Q: How many grams of ammonium nitrate, NH4NO3, must be dissolved to prepare 300. mL of a 0.166 M aqueou...

A: The molarity of a solution is given by the equation (1) in which M is the molarity of solution, n is...


Q: A solution of cough syrup contains 5.00% active ingredient by volume. If the total volume of the bot...

A: Determine the amount of active ingredient in the bottle in milliliters:


Q: If a stock solution of 25.0 g of sugar per 100. mL of solution is available, how much of this stock ...

A: The amount of sugar in diluted solution is calculated as,


Q: Determine the number of moles of H2O produced when o8.607 mole of NH3 reacts according to the balanc...

A: From the balanced equation, it is clear that 4 moles of NH3 reacts to give 6 moles of H2O. Thus, the...


Q: A 36.0 mg sample of an organic compound (molar mass = 84.0 g/mol) is dissolved in 10.0 mL of water. ...

A: Given:Mass = 36.0 mgmolar mass = 84.0 g/molVolume of water = 10 mLMass of Organic compound after sep...


Q: The following questions refer to figures with circles and ovals. The clear circles represent water m...

A: Observing the given Fig.1 clearly shows that compartment A contains both sugar and water molecules, ...