Interpretation: The valence electron configuration for the Group
Concept introduction: Group
To determine: The valence electron configuration for the Group
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Chapter 20 Solutions
Chemistry
- 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_forwardThe wall of a glass beaker contains ≡Si-OH groups. Why are dilute solutions of metal ions (pH > 7) NOT prefered to be stored in glass vessels?arrow_forwardThe melting points of alkaline earth metals are many times higher than those of the alkali metals. Explain this difference on the basis of atomic properties. Name three other physical properties for which Group 2A(2) metals have higher values than the corresponding 1A(1) metalsarrow_forward
- Explain reaction between SAE 304 stainless steel and isopropanol and why it may cause rust?arrow_forwardThiosulfate ion (S2O32-) disproportionates in acidic solution to give solid sulfur and aqueous hydrogen sulfite ion (HSO3-) . Write a balanced equation for this reaction.arrow_forwardHow do atomic properties account for the enormous number of carbon compounds? Why don’t other Group 4A(14) elements behave similarly?arrow_forward
- The sulfite ion, SO32−, reacts with acid analogous to the way carbonate, CO32−, reacts. Write a balanced chemical equation, including phases, for the reaction of potassium sulfite with hydrobromic acidarrow_forwardWhy is BiH3 the strongest reducing agent amongst all the hydrides of Group 15 elements?arrow_forwardExplain the action of TiO2 as a photocalyst during wastewater treatmentarrow_forward
- An element forms an oxide, E2O3, and a fluoride, EF3.(a) Of which two groups might E be a member?(b) How does the group to which E belongs affect the properties of the oxide and the fluoride?arrow_forwardThe 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, because the reaction goes to completion. The amount of iodine produced is then determined by titration with sodium thiosulfate, Na2S2O3, which is oxidized to sodium tetrathionate, Na2S4O6. Potassium iodide was added in excess to 5.00 mL of bleach (density = 1.00 g/mL). This solution, containing the iodine released in the reaction, was titrated with 0.100 M Na2S2O3. If 34.6 mL of sodium thiosulfate was required to reach the endpoint (detected by disappearance of the blue color of the starch iodine complex), what was the mass percentage of NaClO in the bleach?arrow_forward
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