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Unformatted text preview: PRACTICE EXAM (not all questions pertain to a specific mid-term). This is taken from an earlier final exam. 1. (4 pts) Permanganate ion oxidizes sulfide ion to elemental sulfur (which you should represent as a single S atom) and is reduced to MnO 2 in basic solution. In the balanced equation for this reaction, which you should determine in the work area, how many water molecules and hydroxide ions are needed in the final balanced equation? # of H 2 O __________ # of OH- __________ Work area: 2. (5 pts) Data: ClO 4- (aq) + 2 H + (aq) + 2e- ClO 3- (aq) + H 2 O (l) E = +1.23 V Ag + (aq) + e- Ag(s) E = +0.80 V Calculate the reaction quotient Q for a spontaneous reaction using these two half reactions if the potential for the cell is measured to be 0.40 V. Q = ___________________ Work area: 3. (3 pts) Phosphonium bromide, PH 4 Br, thermally decomposes to form two molecules: a Lewis acid and a Lewis base. The Lewis acid is: ______________ The Lewis base is: ______________ 4. (3 pts) Hydrazine is a binary compound of nitrogen with the formula (a) in which N is present in the (b) oxidation state. It is formed when what other N-containing compound (c) is oxidized. (a) _________________ (b) _________________ (c) _________________ 5. (4 pts) What acids are formed during the complete hydrolysis of PCl 3 (a) and PCl 5 (b). (a) _________________ (b) ____________________ 1 6. (3 pts) Give an example of a known chemical compound consisting entirely of s- and/or p-block elements that has an odd number of valence electrons. __________________ 7. (3 pts) Give the formula for the simplest carbonyl complex expected for rhodium (Rh). ________________________________ 8. (4 pts) What is the formula for aluminum carbide (a) and what organic molecule is formed during its hydrolysis (b)? (a) _____________ (b) _____________ 9. (6 pts) Give an example of a saline (ionic) hydride (a), an interstitial (metallic) hydride (b) and a covalent hydride (c) (a) _______________ (b) _______________ (c) __________________ 10. (6 pts) Write the formula for sodium diaquabis(oxalato)ferrate (III) _______________________ and the name for [Co(NH...
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- Fall '10