Question

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125怎麼算

plus  o辣                     1.0 kg concen              Cacid (98凶 日SO04 by mass誰                 和
the      過           128。 Hydrogen peroxide 1S used as a cleansing agent in the freat-          呈卻
ma                      ent Of cuts and abraslons for several] reasonsS. It is an Oxidiz-                 :

e                               Ing agent that can_ directly kill many microorganisms: 1            全
decomposes on contact With blood, releasing elemental oxy-           d.
gen gas (which inhibits the growth of anaerobic microorgan-
1Sms); and it foams on contact with blood, which provides a     1 診  1
ed in       |              cleansing action. In the laboratory, small duantities of hydro-            cop
as                   gen peroxlde can be prepared by the action of an acid on an            兒

時                           alkaline earth metal peroxide, such as barium peroxide:

We                         Baoy() +              H2
What mass of hydrogen peroxide should result when 1.50 g

barium peroxide is treated with 88.0 mL hydrochloric acid
solution containing 0.0272 g HCl per mL? What mass of

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