Solder is an alloy containing the metals tin and lead. A particular sample of this alloy weighing 1.50 g was dissolved in acid. All the tin was then converted to the +2 oxidation state. Next, it was found that 0.368 g of Na2Cr2O7 was required to oxidise the Sn2+ to Sn4+ in an acidic solution. In the reaction the chromium was reduced to Cr3+ ion. The balanced net ionic equation for the reaction between Sn2+ and Cr2O72- in acidic solution is, 3Sn2+ + Cr2O72- + 14H+ 3Sn4+ + 2Cr3+ + 7H2O Calculate the mass (g) of tin that was in the sample of solder. (your answer needs to be within +/- 2%)
Solder is an alloy containing the metals tin and lead. A particular sample of this alloy weighing 1.50 g was dissolved in acid. All the tin was then converted to the +2 oxidation state. Next, it was found that 0.368 g of Na2Cr2O7 was required to oxidise the Sn2+ to Sn4+ in an acidic solution. In the reaction the chromium was reduced to Cr3+ ion. The balanced net ionic equation for the reaction between Sn2+ and Cr2O72- in acidic solution is, 3Sn2+ + Cr2O72- + 14H+ 3Sn4+ + 2Cr3+ + 7H2O Calculate the mass (g) of tin that was in the sample of solder. (your answer needs to be within +/- 2%)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Solder is an alloy containing the metals tin and lead. A particular sample of this alloy weighing 1.50 g was dissolved in acid. All the tin was then converted to the +2 oxidation state. Next, it was found that 0.368 g of Na2Cr2O7 was required to oxidise the Sn2+ to Sn4+ in an acidic solution. In the reaction the chromium was reduced to Cr3+ ion. The balanced net ionic equation for the reaction between Sn2+ and Cr2O72- in acidic solution is,
3Sn2+ + Cr2O72- + 14H+ 3Sn4+ + 2Cr3+ + 7H2O
Calculate the mass (g) of tin that was in the sample of solder. (your answer needs to be within +/- 2%)
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