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Zinc and sodium metal each react with sulfuric acid according to the following equations. Zn(s)+H2SO4(aq)⟶ZnSO4(aq)+H2(g)Zn(s)+H2SO4(aq)⟶ZnSO4(aq)+H2(g) 2Na(s)+H2SO4(aq)⟶Na2SO4(aq)+H2(g)2Na(s)+H2SO4(aq)⟶Na2SO4(aq)+H2(g) A 26.14 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 264 mL of 1.86 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture.  1.)What is the mass percent Na?

Zinc and sodium metal each react with sulfuric acid according to the following equations. Zn(s)+H2SO4(aq)⟶ZnSO4(aq)+H2(g)Zn(s)+H2SO4(aq)⟶ZnSO4(aq)+H2(g) 2Na(s)+H2SO4(aq)⟶Na2SO4(aq)+H2(g)2Na(s)+H2SO4(aq)⟶Na2SO4(aq)+H2(g) A 26.14 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 264 mL of 1.86 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture.  1.)What is the mass percent Na?

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter4: Stoichiometry
Section: Chapter Questions
Problem 4.111PAE: 4.111 Aluminum metal reacts with sulfuric acid to form hydrogen gas and aluminum sulfate (a) Write a...
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Zinc and sodium metal each react with sulfuric acid according to the following equations.

Zn(s)+H2SO4(aq)⟶ZnSO4(aq)+H2(g)Zn(s)+H2SO4(aq)⟶ZnSO4(aq)+H2(g)
2Na(s)+H2SO4(aq)⟶Na2SO4(aq)+H2(g)2Na(s)+H2SO4(aq)⟶Na2SO4(aq)+H2(g)

A 26.14 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 264 mL of 1.86 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture. 

1.)What is the mass percent Na? 

Na, SO,(aq) + BaCl, (aq) → 2 NaCl(aq) + BaSO,(s) Since the maximum quantity of barium sulfate was produced, all of the BaCl, was converted into BaSO, and the moles of BaCl, is equal to the moles of BaSO,. Use the molarity and volume to find the moles of barium chloride. 4* The barium sulfate produced came from both zinc sulfate and sodium sulfate and each was produced in a 1:1 mole ratio. Therefore, mol BaSO, = mol ZnSO, + mol Na, SO, Since the question asks for the mass of sodium metal in the mixture, relate the amounts of zinc sulfate and sodium sulfate to zinc metal and sodium metal. From the balanced chemical equations for the reaction of these metals with sulfuric acid, zinc produces zinc sulfate is a 1:1 mole ratio and sodium produces sodium sulfate in a 2:1 mole ratio. Therefore, 1 = mol Zn + =mol Na 2 mol BaSO4 Express the moles of zinc and sodium in terms of the masses of each (x and y) and the molar masses of each. Then, write a second equation relating x and y to the mass of the mixture.
Transcribed Image Text:Na, SO,(aq) + BaCl, (aq) → 2 NaCl(aq) + BaSO,(s) Since the maximum quantity of barium sulfate was produced, all of the BaCl, was converted into BaSO, and the moles of BaCl, is equal to the moles of BaSO,. Use the molarity and volume to find the moles of barium chloride. 4* The barium sulfate produced came from both zinc sulfate and sodium sulfate and each was produced in a 1:1 mole ratio. Therefore, mol BaSO, = mol ZnSO, + mol Na, SO, Since the question asks for the mass of sodium metal in the mixture, relate the amounts of zinc sulfate and sodium sulfate to zinc metal and sodium metal. From the balanced chemical equations for the reaction of these metals with sulfuric acid, zinc produces zinc sulfate is a 1:1 mole ratio and sodium produces sodium sulfate in a 2:1 mole ratio. Therefore, 1 = mol Zn + =mol Na 2 mol BaSO4 Express the moles of zinc and sodium in terms of the masses of each (x and y) and the molar masses of each. Then, write a second equation relating x and y to the mass of the mixture.
Zinc and sodium metal each react with sulfuric acid according to the following equations. Zn(s) + H, SO,(aq) → ZnSO,(aq) + H, (g) 2. 4 2 Na(s) + H, SO4(aq) → Na, SO4(aq) + H, (g) A 26.14 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 264 mL of 1.86 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture. mass percent Na : 4.75 % Incorrect If 82.16 mL of sulfuric acid was added, what was the concentration of the sulfuric acid? concentration: 5.96 M
Transcribed Image Text:Zinc and sodium metal each react with sulfuric acid according to the following equations. Zn(s) + H, SO,(aq) → ZnSO,(aq) + H, (g) 2. 4 2 Na(s) + H, SO4(aq) → Na, SO4(aq) + H, (g) A 26.14 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 264 mL of 1.86 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture. mass percent Na : 4.75 % Incorrect If 82.16 mL of sulfuric acid was added, what was the concentration of the sulfuric acid? concentration: 5.96 M
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