Question 13 of 13 Chlorine can be prepared in the laboratory by the reaction of manganese...

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Question 13 of 13 Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCI

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Answer 1

Answer #1

Solution:

According to ideal gas equation for Cl2 gas,

PV = n R T

n = PV /RT

Where,

n= number of mol = ?

P = pressure = 805 torr / 760 = 1.06 atm

V = volume = 295 mL = 0.295 L

R = 0.0821 L atm K-1 mol-1

T = 25 + 273 = 298 K

Thus,

n = 1.06 atm x 0.295 L / 0.0821 L atm K-1 mol-1 x 298 K

n = 0.01278 mol of Cl2

From the given reaction, it can be seen that 1 mol Cl2 is produces from 1 mol MnO2

Thus, 0.01278 mol Cl2 produces from 0.01278 mol of MnO2.

Hence,

Mass of MnO2 = number of mol x molar mass

= 0.01278 mol x 86.9368 g mol-1 = 1.11 g

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Answer 2

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