Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HC1(aq), asdescribed by the chemical equationMnO,(s) + 4 HC1(aq)MnCl, (aq) + 2 H,O(1) + Cl,(g)How much MnO, (s) should be added to excess HC1(aq) to obtain 175 mL Cl, (g) at 25 °C and 775 Torr?mass of MnO,:

Question
Asked Dec 8, 2019
1 views
Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HC1(aq), as
described by the chemical equation
MnO,(s) + 4 HC1(aq)
MnCl, (aq) + 2 H,O(1) + Cl,(g)
How much MnO, (s) should be added to excess HC1(aq) to obtain 175 mL Cl, (g) at 25 °C and 775 Torr?
mass of MnO,:
help_outline

Image Transcriptionclose

Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HC1(aq), as described by the chemical equation MnO,(s) + 4 HC1(aq) MnCl, (aq) + 2 H,O(1) + Cl,(g) How much MnO, (s) should be added to excess HC1(aq) to obtain 175 mL Cl, (g) at 25 °C and 775 Torr? mass of MnO,:

fullscreen
check_circle

Expert Answer

Step 1

Given,

Volume of Cl2 gas, V = 175 mL = 0.175 L    (1 mL = 0.001 L)

Temperature, T = 25 °C = (25 + 273) K = 298 K

Pressure, P = 775 torr = 775/760 atm    (1 torr = 1/760 atm)

No. of moles (n) of Cl2 gas can be calculated using the ideal gas equation as:

help_outline

Image Transcriptionclose

PV = nRT PV n = RT 775 atm x 0.175 L 760 n = 0.0821 Latm x 298 K mol K n = 0.0073 mol

fullscreen
Step 2

The balanced chemical reaction is given as:

MnO2 (s) + 4 HCl (aq) → MnCl2 (aq) + 2 H2O (l) + Cl2 (g)

From the given reaction, it is evident that :

help_outline

Image Transcriptionclose

1 mol Cl2 requires → 1 mol MnO2 1 mol MnO2 1 mol Cl2 .. 0.0073 mol Cl2 requires x 0.0073 mol of Cl2 = 0.0073 mol MnO2

fullscreen
Step 3

Mass of MnO2 required can be ...

help_outline

Image Transcriptionclose

Molar mass of MnO2 = 54.9 + (2×16) = 86.9 g/mol Mass of MnO2 = Moles x Molar mass %3D Mass of MnO2 = 0.0073 mol × 86.9 g/mol Mass of MnO2 = 0.634 g

fullscreen

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

Science

Chemistry

General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: In a 4.00 L pressure cooker, water is brought to a boil. If the final temperature is 115 °C at 3.65 ...

A: The number of moles of steam can be calculated by using the ideal gas equation,

question_answer

Q: What is the chemical name for K2CO3?

A: K2CO3 is the inorganic compound. It is a white salt, which is soluble in water. It is deliquescent, ...

question_answer

Q: Complete the mechanism for the acid-catalyzed alcoholysis of the epoxide by adding any missing atoms...

A: Missing atoms, bonds, charges, non-bonding electrons and charges is given as follows,

question_answer

Q: 50.0 mL 0.50 M propanoic acid with 25.0 mL of 1.25 M NaOH.  Determine if it yields a buffer. If not,...

A: A buffer solution is chemical solution which resists change to its pH or acidity. It is a solution i...

question_answer

Q: The catalytic decomposition of hydrogen peroxide yields oxygen gas and water, according to the react...

A: The given reaction is as follows:

question_answer

Q: Problem Page     Aqueous hydrochloric acid  HCl  reacts with solid sodium hydroxide  NaOH  to p...

A: Chemical reaction between HCl and NaOH is given by,

question_answer

Q: Show the bonding of polypropylene (polypropene)

A: Monomers combine together to form polymers.  Monomers are the repeating units of small molecules whi...

question_answer

Q: The wavelength of radiation with an energy of 3.97x10-19 (501 nm)

A: Wavelength can be calculated using the given equation:

question_answer

Q: Which product(s) form(s) at each electrode in the aqueous electrolysis of the following salts? Selec...

A: On electrolysis of the molten solution of FeI2, Fe produces at cathode on the reduction of Fe2+ to F...