f 15.8 M HNO3. umber 2 and 3 at ainimum mass of the line provided

Chemistry: An Atoms First Approach
2nd Edition
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Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter5: Stoichiometry
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Problem 103E: Silicon is produced for the chemical and electronics industries by the following reactions. Give the...
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A CHM 125 student perfomed the five step reaction to produce copper(I) chloride as outlined in the CHIM
125 laboratory manual. The chemical reactions carried out are shown below:
1. Cu(s) + 4HNO3(aq)
2. 2HNO3(aq) + Na2CO3(s)
3. Cu(NO3)2(aq) + NazCO3(s)
4. CUCO3(s) + 2HCI(aq) CUC2(aq) + H2O(E) + CO2(g)
5. CuCl2(aq) + Cu(s)
Cu(NO3)2(aq) + 2NO2(g) + 2H2O(E)
→ H20(£) + CO2(g) + 2NaNO3(aq)
→ CuCO;(s) + 2NaNO3(aq)
2CuCI(s)
The student carried out reaction number 1 by combining 1.034 g of Cu(s) and 5.0 mL of 15.8 M HNO3.
The student then added 3.911 g of Na,C0:(s) to the mixture to carry out both reaction number 2 and 3 at
the same time. Show that the 3.911g of Na,CO3 was in excess by calculating the minimum mass of
NazCO3(s) actually needed for the second and third reactions. Write your final answer on the line provided
at the bottomn of the page.
Transcribed Image Text:A CHM 125 student perfomed the five step reaction to produce copper(I) chloride as outlined in the CHIM 125 laboratory manual. The chemical reactions carried out are shown below: 1. Cu(s) + 4HNO3(aq) 2. 2HNO3(aq) + Na2CO3(s) 3. Cu(NO3)2(aq) + NazCO3(s) 4. CUCO3(s) + 2HCI(aq) CUC2(aq) + H2O(E) + CO2(g) 5. CuCl2(aq) + Cu(s) Cu(NO3)2(aq) + 2NO2(g) + 2H2O(E) → H20(£) + CO2(g) + 2NaNO3(aq) → CuCO;(s) + 2NaNO3(aq) 2CuCI(s) The student carried out reaction number 1 by combining 1.034 g of Cu(s) and 5.0 mL of 15.8 M HNO3. The student then added 3.911 g of Na,C0:(s) to the mixture to carry out both reaction number 2 and 3 at the same time. Show that the 3.911g of Na,CO3 was in excess by calculating the minimum mass of NazCO3(s) actually needed for the second and third reactions. Write your final answer on the line provided at the bottomn of the page.
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