Describe, without doing calculations, how graphs can be used to determine whether this reaction is first or second order in A and how these graphs are used to determine the rate constant. 6) (a) Specify the properties of a buffer solution. Describe the components and the composition of effective buffer solutions. (b) An employer is interviewing four applicants for a job as a laboratory technician and asks each how to prepare a buffer solution with a pH close to 9. Archie A. says he would mix acetic acid and sodium acetate solutions. Beula B. says she would mix NH4Cl and HCl solutions. Carla C. says she would mix NH4Cl and NH3 solutions. Dexter D. says he would mix NH3 and NaOH solutions. Which of these applicants has given an appropriate procedure? Explain your answer, referring to your discussion in part (a). Explain what is wrong with the erroneous procedures. (No calculations are necessary, but the following acidity constants may be helpful: acetic acid, Ka = 1.8 x NH4+, Ka = 5.6 x 7) The transition metal complex ion, [Co(NH2CH2CH2NH2)2Cl2]+, has an octahedral shape and exists as two geometric isomers. (a) Draw the structural formulas for the two geometrical isomers. (b) One of the geometrical isomers exists as two optical isomers. Draw the structural formulas for the two optical isomers. (c) How many moles of AgCl would be immediately precipitated when excess AgNO3 solution is added to an aqueous solution containing mole of [Co(NH2CH2CH2NH2)2Cl2]Cl, the chloride salt of the transition metal complex? Explain your reasoning. 8) Ti3+ + HOBr <===> TiO2+ + Br¯ (in acid solution) (a) Write the correctly balanced half-reaction and net ionic equation for the skeletal equation shown above. (b) Identify the oxidizing agent and the reducing agent in this reaction.
Describe, without doing calculations, how graphs can be used to determine whether this reaction is first or second order in A and how these graphs are used to determine the rate constant. 6) (a) Specify the properties of a buffer solution. Describe the components and the composition of effective buffer solutions. (b) An employer is interviewing four applicants for a job as a laboratory technician and asks each how to prepare a buffer solution with a pH close to 9. Archie A. says he would mix acetic acid and sodium acetate solutions. Beula B. says she would mix NH4Cl and HCl solutions. Carla C. says she would mix NH4Cl and NH3 solutions. Dexter D. says he would mix NH3 and NaOH solutions. Which of these applicants has given an appropriate procedure? Explain your answer, referring to your discussion in part (a). Explain what is wrong with the erroneous procedures. (No calculations are necessary, but the following acidity constants may be helpful: acetic acid, Ka = 1.8 x NH4+, Ka = 5.6 x 7) The transition metal complex ion, [Co(NH2CH2CH2NH2)2Cl2]+, has an octahedral shape and exists as two geometric isomers. (a) Draw the structural formulas for the two geometrical isomers. (b) One of the geometrical isomers exists as two optical isomers. Draw the structural formulas for the two optical isomers. (c) How many moles of AgCl would be immediately precipitated when excess AgNO3 solution is added to an aqueous solution containing mole of [Co(NH2CH2CH2NH2)2Cl2]Cl, the chloride salt of the transition metal complex? Explain your reasoning. 8) Ti3+ + HOBr <===> TiO2+ + Br¯ (in acid solution) (a) Write the correctly balanced half-reaction and net ionic equation for the skeletal equation shown above. (b) Identify the oxidizing agent and the reducing agent in this reaction.
1983%20Test.docx