4. Mass of malachite used 98.000g 95.195 g 2.805 5. Moles of malachite used 6. M

Question

4. Mass of malachite used 98.000g 95.195 g 2.805 5. Moles of malachite used 6. Mass of CuO produced 7. Moles of Cuo produced 8. Ratio of moles Cuo produced per moles of malachite decomposed (used) 9. Use the ratio of CuO produced per mole of malachite to balance the following equation for the malachite decomposition reaction. Just insert the proper coefficients in the proper location(s). Note that CO2 is also a product of this reaction Cu2CO3 (OH)2 2 CuO CO2 (g) H20 (l) 10. Using your balanced equation (9 above) calculate the mass of CuO expected to result from the decomposition of the amount of malachite ou used 11. Compare the calculated mass CuO (10 above) to the obtained mass of CuO (6 above), and discuss reasons for any discrepancy Molecular weight 221.1 g/mo 200C es into Cooper(II) oxidie (CuO) crucible 88.000g with 10 g Cu2Co3 (OH)22.5mL 98.000g After Bunsen Burner 1.1 mL 95.195g NEED TECHNICAL SUPPORT

Explanation / Answer

5. Moles of malachite used=2.805/221.1=0.126 moles

6. Mass of CuO produced=95.195-88.00=7.195g

7. Moles of CuO=7.195/79.55=0.0904 moles

8. 1:2

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