1. What is the balanced chemical equation of CuSO₄and NaS?
2. Which of the following contains an excess of CuSO₄, or NaS, or neither? (excluding Test tubes 1 and 7)
Test tube 1: 6 mL CuSO₄ and 0 mL NaS
Test tube 2: 5 mL CuSO₄ and 1 mL NaS
Test tube 3: 4 mL CuSO₄ and 2 mL NaS
Test tube 4: 3 mL CuSO₄ and 3 mL NaS
Test tube 5: 2 mL CuSO₄ and 4 mL NaS
Test tube 6: 1 mL CuSO₄ and 5 mL NaS
Test tube 7: 0 mL CuSO₄ and 6 mL NaS
test solutions used: 6M NH3(20mL) and 0.4 ZnSO4
3. Which has the largest amount of precipitate?
a) What was the ratio of CuSO₄and NaS used?
4. What is chemical formula for copper (II) sulfide?
5. Explain how excess reagents and the amount of precipitate is formed?© BrainMass Inc. brainmass.com October 25, 2018, 12:47 am ad1c9bdddf
This solution describes how to find the limiting and excess reagent in the reaction between copper (II) sulfate and sodium sulfide. In addition to this, the solution describes how to find the amount of precipitate formed based on the amount of reagents used.
Assorted Stoichiometry and Theoretical Yield Problems
1) What is the weight percentage of C in C6H12O6? Report your answer to 3 significant figures.
2) What is the molar mass of TiCl4? Report your answer to two decimal places.
3) 20.0g of each Fe2O3 and Al are mixed together and react according to the following equation. What is the theoretical yeild of Fe? Report your answer in grams, to 3 significant figures.
4) Write a balanced equation for the reaction between lead nitrate and sodium sulfate, in solution.
5) What is the molarity of a 1.30L solution containing 6.00g of NaCN? Report your answer to the correct number of significant figures.