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Stoichiometry Review

Stoichiometry Review. Question 1. Chlorine is used by textile manufacturers to bleach cloth. Excess chlorine is destroyed by its reaction with sodium thiosulfate, Na 2 S 2 O 3 : Na 2 S 2 O 3(aq) + 4Cl 2(g) + 5H 2 O (aq)  2NaHSO 4(aq) + 8HCl (aq)

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Stoichiometry Review

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  1. Stoichiometry Review

  2. Question 1 • Chlorine is used by textile manufacturers to bleach cloth. Excess chlorine is destroyed by its reaction with sodium thiosulfate, Na2S2O3: Na2S2O3(aq)+ 4Cl2(g)+ 5H2O(aq) 2NaHSO4(aq)+ 8HCl(aq) • How many moles of Na2S2O3 are needed to react with 0.12mol of Cl2?

  3. Question 2 • How many moles of HCl can form from 0.12mol of Cl2?

  4. Question 3 • How many moles of H2O are required for the reaction of 0.12mol of Cl2?

  5. Question 4 • Silver nitrate, AgNO3, reacts with iron(III) chloride, FeCl3, to give silver chloride, AgCl, and iron(III) nitrate, Fe(NO3)3. A solution containing 18.0g AgNO3 was mixed with a solution containing 32.4g FeCl3. How many grams of which reactant remains after the reaction is over?

  6. Question 5 • Barium sulfate, BaSO4, is made by the following reaction: Ba(NO3)2 + Na2SO4 BaSO4 + 2NaNO3 • An experiment was begun with 75.00g of Ba(NO3)2 and an excess of Na2SO4. After collecting and drying the product, 63.45g BaSO4 was obtained. Calculate the theoretical yield and percent yield of BaSO4.

  7. Question 6 • In a reaction with sodium hydroxide and sulfuric acid, 200 mL of water are produced. If the density of water is 1.0 g/mL, what mass of sulfuric acid was needed for this reaction? 2NaOH + H2SO4 2H2O + Na2SO4

  8. Question 7 • Write the equation for the reaction of iron (III) phosphate with sodium sulfate to make iron (III) sulfate and sodium phosphate.

  9. Question 8 • If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many grams of iron (III) sulfate can I make?

  10. Question 9 • If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield?

  11. Question 10 • If I do this reaction with 15 grams of sodium sulfate and get a 65.0% yield, how many grams of sodium phosphate will I make?

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