Chapter 20: Problem 15
Write a balanced equation and give the names of the products for the reaction of (a) magnesium with chlorine. (b) barium peroxide with water. (c) lithium with sulfur. (d) sodium with water.
Chapter 20: Problem 15
Write a balanced equation and give the names of the products for the reaction of (a) magnesium with chlorine. (b) barium peroxide with water. (c) lithium with sulfur. (d) sodium with water.
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Get started for freeGive the formula and name of the compound formed by potassium with (a) nitrogen (b) iodine (c) water (d) hydrogen (e) sulfur
Iron(II) can be oxidized to iron(III) by permanganate ion in acidic solution. The permanganate ion is reduced to manganese(II) ion. (a) Write the oxidation half-reaction, the reduction half-reaction, and the overall redox equation. (b) Calculate \(E^{\circ}\) for the reaction. (c) Calculate the percentage of Fe in an ore if a \(0.3500-\mathrm{g}\) sample is dissolved and the \(\mathrm{Fe}^{2+}\) formed requires for titration \(55.63 \mathrm{~mL}\) of a \(0.0200 \mathrm{M}\) solution of \(\mathrm{KMnO}_{4}\)
Balance the following redox equations. (a) \(\mathrm{Fe}(s)+\mathrm{NO}_{3}^{-}(a q) \longrightarrow \mathrm{Fe}^{3+}(a q)+\mathrm{NO}_{2}(g)\) (acidic) (b) \(\mathrm{Cr}(\mathrm{OH})_{3}(s)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{CrO}_{4}^{2-}(a q)\) (basic)
A \(0.500-\mathrm{g}\) sample of zinc-copper alloy was treated with dilute hydrochloric acid. The hydrogen gas evolved was collected by water displacement at \(27^{\circ} \mathrm{C}\) and a total pressure of \(755 \mathrm{~mm} \mathrm{Hg}\). The volume of the water displaced by the gas is \(105.7 \mathrm{~mL}\). What is the percent composition, by mass, of the alloy? (Vapor pressure of \(\mathrm{H}_{2} \mathrm{O}\) at \(27^{\circ} \mathrm{C}\) is \(26.74 \mathrm{~mm} \mathrm{Hg}\).) Assume only the zinc reacts.
Using Table \(20.4\), calculate, for the disproportionation of \(\mathrm{Au}^{+}\), (a) \(K\). (b) the concentration of \(\mathrm{Au}^{+}\) in equilibrium with \(0.10 \mathrm{M} \mathrm{Au}^{3+}\).
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