Concept explainers
Hydrogen peroxide is used as a cleaning agent in thetreatment of cuts and abrasions for several reasons. It isan oxidizing agent that can directly kill many microorganisms;it decomposes upon contact with blood, releasingelemental oxygen gas (which inhibits the growthof anaerobic microorganisms); and it foams upon contactwith blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxidecan be prepared by the action of an acid on an alkalineearth metal peroxide, such as barium peroxide:
What amount of hydrogen peroxide should result when1.50 g of barium peroxide is treated with 88.0 mL ofhydrochloric acid solution containing 0.0272 g of HClper mL? What mass of which reagent is left unreacted?
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Chemical Principles
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- Solid calcium carbide (CaC2)reacts with liquid water to produce acetylene gas (C2H2)and aqueous calcium hydroxide. l type='a'> Write the balanced equation for the reaction that is (occurring. including all phases. If a 100.0-g sample of calcium carbide (CaC2)is initially reacted with 50.0 g of water, which reactant is limiting? Prove that mass is conserved for the reactant amounts used in pan b.arrow_forwardWhen yeast is added to a solution of glucose or fructose, the sugars are said to undergo fermentation, and ethyl alcohol is produced. :math>C6H12O6(aq)2C2H5OH(aq)+2CO2(g) is is the reaction by which wines arc produced from grape juice. Calculate the mass of ethyl alcohol, C2H5OH. Produced when 5.25 g of glucose, C6H12O6, undergoes this reaction.arrow_forwardIn an accident, a solution containing 2.5 kg of nitric acid was spilled. Two kilograms of Na2CO3 was quickly spread on the area and CO2 was released by the reaction. Was sufficient Na2CO3 used to neutralize all of the acid?arrow_forward
- It sodium peroxide is added to water, elemental oxygen gas is generated: :math>Na2O2(s)+H2O(l)NaOH(aq)+O2(g) ppose 3.25 g of sodium peroxide is added to a large excess of water. What mass of oxygen gas will be produced?arrow_forwardhe production capacity for acrylonitrile (C3H3N)in the United States is over 2 billion pounds per year. Acrylonitrile, the building block tor acrylonitrile fibers and a variety of plastics, is produced from gaseous propylene, ammonia, and oxygen: :math>2C3H6(g)+2NH3(g)+3O22C3H3N(g)+6H2O(g) l type='a'> Assuming 100% yield, determine the mass of acrylonitrile which can be produced from the mixture below: l> Mass Reactant msp;5.23102g propylene td> msp;5.00102g ammonia td> msp;1.00103g oxygen td> i>What mass of water is formed from your mixture? Calculate the mass (in grams) of each reactant after the reaction is complete.arrow_forwardA mordant is a substance that combines with a dye to produce a stable fixed color in a dyed fabric. Calcium acetate is used as a mordant. It is prepared by the reaction of acetic acid with calcium hydroxide. 2CH3CO2H+Ca(OH)2Ca( CH3 CO2)2+2H2O What mass of Ca(OH)2 is required to react with the acetic acid in 25.0 mL of a solution having a density of 1.065 g/mL and containing 58.0% acetic acid by mass?arrow_forward
- 4-89 If 7.0 kg of is added to 11.0 kg of to form which reactant is in excess?arrow_forwardTen mL of concentrated H3PO4 (91.7% by mass, d=1.69g/mL) was accidentally poured into a beaker containing 20.0 g of NaOH. Not all the NaOH was consumed. How many grams of NaOH were left unreacted? The equation for the reaction is H3PO4(aq)+3OH(aq)3H2O+PO43(aq)arrow_forwardWrite a chemical equation representing the decomposition of water into two gaseous products. What are the products?arrow_forward
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