Concept explainers
Interpretation: To predict the oxidized and reduced substance in the reaction of
Concept introduction: Diborane is an important boron hydride compound with the formula
Diborane can be synthesized from sodium boron hydride and iodine. The formula of sodium boron hydride is
An oxidizing agent is a substance that oxidizes another substance in a
A reducing agent is a substance that reduces another substance in a chemical reaction and itself gets oxidized.
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- Using data in Appendix 1, estimate the temperature at which Fe2O3 can be reduced to iron, using hydrogen gas as a reducing agent (assume H2O(g) is the other product).arrow_forwardXenon trioxide, XeO3, is reduced to xenon in acidic solution by iodide ion. Iodide ion is oxidized to iodine, I2. Write a balanced chemical equation for the reaction.arrow_forwardPhosphorous acid, H3PO3, is oxidized to phosphoric acid, H3PO4, by nitric acid, which is reduced to nitrogen monoxide, NO. Write the balanced equation for this reaction.arrow_forward
- The amount of sodium hypochlorite in a bleach solution can be determined by using a given volume of bleach to oxidize excess iodide ion to iodine; ClO- is reduced to Cl-. The amount of iodine produced by the redox reaction is determined by titration with sodium thiosulfate, Na2S2O3; I2 is reduced to I-. The sodium thiosulfate is oxidized to sodium tetrathionate, Na2S4O6. In this analysis, potassium iodide was added in excess to 5.00 mL of bleach (d=1.00g/cm3) . If 25.00 mL of 0.0700 M Na2S2O3 was required to reduce all the iodine produced by the bleach back to iodide, what is the mass percent of NaClO in the bleach?arrow_forwardSodium perchlorate, NaClO4, is produced by electrolysis of sodium chlorate, NaClO3. If a current of 2.50 103 A passes through an electrolytic cell, how many kilograms of sodium perchlorate are produced per hour?arrow_forwardWhich is the stronger acid, H2SO4 or H2SeO4? Why? You may wish to review the Chapter on acid-base equilibria.arrow_forward
- Elemental analysis of a borane indicates this composition: 84.2% B and 15.7% H. The compound has a molar mass of 76.7 g/mol. Determine the molecular formula of the borane.arrow_forwardBalance the following equations by oxidation-reduction methods; note that three elements change oxidation state.. Co(NO3)2(s)Co2O3(s)+NO2(g)+O2(g)arrow_forward
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