Quiz 3&4

Quiz 3&4 - (s) + 2NaNO 3 (aq) 7. Calculate the mass of...

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Bring to class Tuesday Name: ________________________ For the reaction: 55 mL of 2.0M Na 2 SO 4 (aq) is added to 25mL of 1.0M Pb(NO 3 ) 2 (aq) Show all work on this sheet. 1. Name both reactants. Sodium sulfate and lead(II)nitrate 2. How many moles sodium in 2 moles Na 2 SO 4 ? 4 3. Calculate the molar mass of Na 2 SO 4 . Include units with your answer. 142g/mol 4. What are the 2 products of the reaction? PbSO 4 and NaNO 3 5. Identify the precipitate. PbSO 4 6. Write the balanced chemical equation. Include all phases. Na 2 SO 4 (aq) + Pb(NO 3 ) 2 (aq) PbSO 4
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Unformatted text preview: (s) + 2NaNO 3 (aq) 7. Calculate the mass of Na 2 SO 4 in the solution. 2.0mol/L x 0.055L x 142g/mol = 16g 8. Calculate the mass of the precipitate that can be prepared from this mass. . 2.0mol/L x 0.055L x 1mole PbSO4/1moleNa2SO4 x 303g/mol = 33g 9. What is the molarity of the sodium ion in the final solution? Molarity Na + ion in original solution is 4.0M 55mL x 4.0M/80ml = 2.75M 10. What are the oxidation numbers of the sulfur and the lead in the reactants? 1. S: +6 2. Pb: +2...
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This note was uploaded on 02/25/2010 for the course CHM 101 taught by Professor Geldart during the Spring '07 term at Rhode Island.

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