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Bookmarks Window Help saplinglearning.com LEUNG: Unit 2-GAS,, LEUNG: Unit 3-LIQUIDS LEUNG: Unit 4-SOLUTIONS t atma Jump to.. 7/9/2018 08:00 AM 61.3/100 7/5/2018 07:41 PM Gradebook Print Calculator Periodic Table Question 14 of 20 General Chemistry 4th Edition University Science Books presented by Sapling Leaming Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCKa?), as described by the chemical How much MnO(s) should be added to excess HCi(aq) to obtain 365 mL of Chig) at 25 "C and 755 Tom? Number R MnO, Hint about us careers privacy policy terms of use contact us heip

Explanation / Answer

MnO2(s) + 4HCl(aq) ---------> MnCl2(aq) + 2H2O(l) + Cl2(g)
V = 365ml = 0.365L
T = 25+273 = 298K
P = 755/760 = 0.9934 atm
PV = nRT
n   = PV/RT
    = 0.9934*0.365/0.0821*298 = 0.01482 moles
1 moles of Cl2 produced from 1 moles of MnO2
0.01482 moles of Cl2 produced from 0.01482 moles of MnO2
mass of MnO2 = no of moles * gram molar mass
              = 0.01482*86.9368 = 1.2884g

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