For the following questions (Q1-Q4), consider the compound CoCl2 • 6H2O (cobalt (II) chloride hexahydrate) which comes as beautiful red-purple crystals. Katie weighs out 2.51 g of the CoCl2 • 6H2O compound on the balance for her experiment.   Q1. Determine the molar mass of CoCl2 • 6H2O compound.   Q2. Convert 2.51 g of the CoCl2 • 6H2O to moles.   Q3. Katie heats her hydrate to remove the water and obtain the anhydrous cobalt (II) compound CoCl2. Her results are below. Complete Katie’s data table of experimental results.   Mass of dry crucible + lid 42.37 g Mass of dry crucible + lid + CoCl2 • 6H2O (hydrate) 44.88 g Mass of CoCl2 • 6H2O 2.51 g Mass of crucible + lid + CoCl2 (after heating) 43.79 g Mass of CoCl2 (anhydrous) g Mass of water removed g Molar mass of water 18.02 g/mol Molar mass of CoCl2 129.84 g/mol Moles of H2O mol Moles of CoCl2 mol Molar ratio of water to CoCl2 (experimental)   Molar ratio of water to CoCl2 (theoretical) 6.00 % error of the molar ratio %   Q4. What was the most likely source of error in Katie’s experiment?

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter3: Molecules, Moles, And Chemical Equations
Section: Chapter Questions
Problem 3.68PAE: 3.68 Magnesium is lighter than other structural metals, so it is increasingly important in the...
icon
Related questions
Question

For the following questions (Q1-Q4), consider the compound CoCl2 • 6H2O (cobalt (II) chloride hexahydrate) which comes as beautiful red-purple crystals. Katie weighs out 2.51 g of the CoCl2 • 6H2O compound on the balance for her experiment.

 

Q1. Determine the molar mass of CoCl2 • 6H2O compound.

 

Q2. Convert 2.51 g of the CoCl2 • 6H2O to moles.

 

Q3. Katie heats her hydrate to remove the water and obtain the anhydrous cobalt (II) compound CoCl2. Her results are below. Complete Katie’s data table of experimental results.

 

Mass of dry crucible + lid

42.37 g

Mass of dry crucible + lid + CoCl2 • 6H2O (hydrate)

44.88 g

Mass of CoCl2 • 6H2O

2.51 g

Mass of crucible + lid + CoCl2 (after heating)

43.79 g

Mass of CoCl2 (anhydrous)

g

Mass of water removed

g

Molar mass of water

18.02 g/mol

Molar mass of CoCl2

129.84 g/mol

Moles of H2O

mol

Moles of CoCl2

mol

Molar ratio of water to CoCl2 (experimental)

 

Molar ratio of water to CoCl2 (theoretical)

6.00

% error of the molar ratio

%

 

Q4. What was the most likely source of error in Katie’s experiment?

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 2 images

Blurred answer
Knowledge Booster
Concentration Terms
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry for Engineering Students
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: The Molecular Science
Chemistry: The Molecular Science
Chemistry
ISBN:
9781285199047
Author:
John W. Moore, Conrad L. Stanitski
Publisher:
Cengage Learning
General Chemistry - Standalone book (MindTap Cour…
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
Chemistry: Principles and Practice
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning