RecitationSet3

RecitationSet3 - 2 is added to 0.400 L of 0.500 M aqueous...

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Tufts University - Chem 1 - Summer 2008 Recitation Set 3 June 2 (Mon), 1 pm, Pearson 106 1. How many grams of magnesium sulfate heptahydrate are required to prepare 250.0 mL of a 0.1000 M solution? 2 . A solution of barium iodide has a mass percentage concentration of 35.0% and a molarity of 1.265 M. Calculate the density of the solution (in g/mL). 3 . a) How many mL of 0.250 M solution of Na 2 S(aq) are required to precipitate all bismuth from 45.0 mL of 0.120 M Bi(NO 3 ) 3 (aq)? b) After the precipitation reaction, the solid was filtered off, and the solution was carefully evaporated. What solid is obtained after the evaporation? How many grams of the solid can be obtained? 4. A solid sample of Zn(OH)
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Unformatted text preview: 2 is added to 0.400 L of 0.500 M aqueous HBr. The solution that remains is still acidic. It is then titrated with 0.500 M NaOH solution, and it takes 98.5 mL of the NaOH solution to reach the equivalence point. What mass of Zn(OH) 2 was added to the HBr solution? 5 . A 10.000-g zinc plate was put into an aqueous solution prepared from dissolving 0.500 g of a solid mixture of copper(II) nitrate and silver(I) nitrate in 100 mL water. After all chemical reactions in the system were completed, the zinc metal plate was taken out, cleaned, and weighed. The mass of zinc metal in the plate became 9.881 g. How many grams of silver nitrate were there in the mixture?...
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