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11 Nov 2019
Write two balanced chemical reactions, one for the reaction of aluminum with hydrochloric acid and the other for the reaction of zinc with hydrochloric acid. 2. Write down the relationship between the number of moles of H2 formed and the number of moles of Zn reacted, assuming a complete reaction. Similarly, write down the relationship between the number of moles of H2 formed and the number of moles of Al reacted. [Note: These relationships are key to this experiment!] 3. 4. At conditions (temperature and pressure) similar to what you will experience in lab, 1 mole of hydrogen gas takes up a volume of 24.8 Liters. a. A student performing this experiment on a sample of pure Zn decides that she wants to generate 350 mL of H2. Calculate the mass of Zn required. b. Assume the student wishes to use five times as many moles of HCI as are required to readt completely with this Zn (a "five-fold molar excess"). What volume of 6 M HCl would be required? What mass of Aluminum would be required to generate the same 350 mL of H2 under the same conditions as those specified in the problem above? c.
Write two balanced chemical reactions, one for the reaction of aluminum with hydrochloric acid and the other for the reaction of zinc with hydrochloric acid. 2. Write down the relationship between the number of moles of H2 formed and the number of moles of Zn reacted, assuming a complete reaction. Similarly, write down the relationship between the number of moles of H2 formed and the number of moles of Al reacted. [Note: These relationships are key to this experiment!] 3. 4. At conditions (temperature and pressure) similar to what you will experience in lab, 1 mole of hydrogen gas takes up a volume of 24.8 Liters. a. A student performing this experiment on a sample of pure Zn decides that she wants to generate 350 mL of H2. Calculate the mass of Zn required. b. Assume the student wishes to use five times as many moles of HCI as are required to readt completely with this Zn (a "five-fold molar excess"). What volume of 6 M HCl would be required? What mass of Aluminum would be required to generate the same 350 mL of H2 under the same conditions as those specified in the problem above? c.
Collen VonLv2
15 Jul 2019