Answered: Which set of the coefficient given is…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter18: Introduction To Electrochemistry

Section: Chapter Questions

Problem 18.7QAP

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The equation Ag(aq) + Cu(s) Cu2(aq) + Ag(s) has equal numbers of each type of element on each side of the equation. This equation, however, is not balanced. Why is this equation not balanced? Balance the equation.
The carbon dioxide exhaled in the breath of astronauts is often removed from the spacecraft by reaction with lithium hydroxide 2LiOH(s)+CO2(g)Li2CO3(s)+H2O(l) Estimate the grams of lithium hydroxide required per astronaut per day. Assume that each astronaut requires 2.50 103 kcal of energy per day. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 2.50 103 kcal of heat, calculate the amount of CO2 produced and hence the amount of LiOH required. The H for glucose(s) is 1273 kJ/mol.
Balance the following equations, and then classify each as a precipitation, acid-base, or gas-forming reaction. (a) Ba(OH)2(aq) + HCl(aq) BaCl2(aq) + H2O() (b) HNO3(aq) + CoCO3(s) Co(NO3)2(aq) + H2O() + CO2(g) (c) Na3PO4(aq) + Cu(NO3)2(aq) Cu2(PO4)2(s) + NaNO3(aq)
Balance each of the following equations, and classify them as precipitation, acid-base, gas-forming, or oxidation-reduction reactions. Show states for reactants and products (s, , g, aq). (a) CuCl2 + H2S CuS + HCl (b) H3PO4 + KOH H2O + K3PO4 (c) Ca +HBr H2 + CaBr2 (d) MgC12 + NaOH Mg(OH)2 + NaCl
Chlorine gas was first prepared in 1774 by C. W. Scheele by oxidizing sodium chloride with manganese(IV) oxide. The reaction is NaCl(aq)+H2SO4(aq)+MnO2(s)Na2SO4(aq)+MnCl2(aq)+H2O(l)+Cl2(g) Balance this equation.
1. Sometimes a reaction can fall in more than one category. Into what category (or categories) does the reaction of Ba(OH)2(aq) + H+PO4(aq) fit? acid-base and oxidation-reduction oxidation-reduction acid-base and precipitation precipitation
Magnesium metal (a component of alloys used in aircraft and a reducing agent used in the production of uranium, titanium, and other active metals) is isolated from sea water by the following sequence of reactions: Mg2+(aq)+Ca(OH)2(aq)Mg(OH)2(s)+Ca2+(aq)Mg(OH)2(s)+2HCl(aq)MgCl2(s)+2H2O(l)MgCl2(l)electrolysisMg(s)+Cl2+Cl2(g) Sea water has a density of 1.026 g/cm3 and contains 1272 parts per million of magnesium a5 Mg2+(aq) by mass. What mass, in kilograms, of Ca(OH)2; is required to precipitate 99.9% of the magnesium in 1.00103 L of sea water?
If enough Li2SO4 dissolves in water to make a 0.33 M solution, explain why the molar concentration of Li+ is different from the molar concentration of Li2SO4(aq).
Bromine is obtained from sea water by the following redox reaction: Cl2(g) + 2 NaBr(aq) 2 NaCl(aq) + Br2() (a) What has been oxidized? What has been reduced? (b) Identify the oxidizing and reducing agents.
Balance the following equations, and then write the net ionic equation: (a) Zn(s) + HCl(aq) H2(g) + ZnCl2(aq) (b) Mg(OH)2(s) + HC1(aq) MgCl2(aq) + H2O() (c) HNO3(aq) + CaCO3(s) Ca(NO3)2(aq) + H2O() + CO2(g) (d) (NH4)2S(aq) + FeCl2(aq) NH4C1(aq) + FeS(s)
Balance the following equations: (a) for the reaction to produce "superphosphate" fertilizer Ca3(PO4)2(s) + H2SO4(aq) Ca(H2PO4)2(aq) + CaSO4(s) (b) for the reaction to produce diborane, B2H6 NaBH4(s) + H2SO4(aq) B2H6(g) + H2(g) + Na2SO4(aq) (c) for the reaction to produce tungsten metal from tungsten(VI) oxide WO3(s) + H2(g) W(s) + H2O() (d) for the decomposition of ammonium dichromate (NH4)2Cr2O7(s) N2(g) + H2O() + Cr2O3(s)

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Which set of the coefficient given is used to balance the following reaction? AL(NO3)3 +NA2S = AL2S3 + N2NO3 A. 3,4,2,6 B. 2,3,1,6 C. 2,6,3,1 D. 2,4,3,2