REVIEW for final

# REVIEW for final - 2 H 5 OH . Calculate the Molarity of C 2...

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SOME review questions for the Final Exam (A07) 1. A 3.00 g sample of an alloy (containing only Pb and Sn) was dissolved in nitric acid . Sulfuric acid was added to this solution, which precipitated 2.73 g of PbSO 4 (mm: 303.3). Assuming that all of the lead was precipitated, what is the mass percentage of Pb in the sample? 2. a. Write a total molecular reaction & CHECK if an insoluble product forms. b. Write the total ionic reaction. c. Write the NET-IONIC reaction and list the spectator ions . Each equation must be BALANCED . a. Cr(NO 3 ) 3 aq + K 2 S aq b. c. 3. What is the molarity after we add 25 ml water to 65 ml of 2.0M solution? 4. Net ionic for strong ac. + strong base. Net ionic for weak ac. + strong base 5. We react 0.40 L of 0.25 M H 2 SO 4 to 0.450 L of 0.289 M NaOH a.Find #mol H + and #mol OH - in original solutions. b. NET-ionic reaction of neutralization: c. Which ion (H + or OH - ) is in excess? d. Final #mol and molarity of the excess ion .

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5. . Which contains more ions: 150. ml of 0.300 M AlCl 3 or 120 ml of 0.400 M KCl? THINK! 6. The formula for ethanol is C
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Unformatted text preview: 2 H 5 OH . Calculate the Molarity of C 2 H 5 OH in PURE ethanol (d=0.970 g/mL) 7. A solution contains the ions Ag + , Pb 2+ , and Ni 2+ . Dilute solutions of NaCl, Na 2 SO 4 , and Na 2 S are reagents available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order ? a. First reagent: _______ will precipitate ________ only. b. Second reagent _______ will precipitate ________ only. c. Third reagent _______ will precipitate ________ . 8. Assign oxidation numbers for P . P 2 O 5 PH 4 + PF 3 PO 4 -3 K 2 HPO 3 P 4 9. Balance by ½ cell . HIO 3 + H 2 SO 3 I 2 + H 2 SO 4 + H 2 O Br-+ MnO 4- Br 2 + Mn +2 ( acidic solution) I plan to have questions from Ch 7, 8, 9 on Tue....
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## This note was uploaded on 12/09/2009 for the course CHEM 1010 taught by Professor N/a during the Fall '07 term at SUNY Stony Brook.

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REVIEW for final - 2 H 5 OH . Calculate the Molarity of C 2...

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