Question

1. Consider the reaction: MnO2 (s) + 4 HCl (g)MnCl2 (s) + Cl2 (g) + 2 H20 (g) If 10.00 g of MnO2 and 10.00 g of HCl are reacted, how many grams of MnCl2 can be produced? Show all calculations 2. Consider the following unbalanced equation: NH4NOs(aq) + Na PO4(aq)(NH4)3PO4(aq NaNOs(aq) Assuming you start with 50.0 g of NHNOs and 50.0 g of NasPO4, which is the limiting reagent? What is the theoretical yield (g) of ammonium phosphate? a. b. 3. 18.15 g of copper (II) chloride (aq) react with 20.00 g of sodium hydroxide (aq) to form sodium chloride (aq) and copper (II) hydroxide (s). a. Write the balance chemical equation for this reaction b. What is the limiting reagent? c. What is the theoretical yield of copper (II) hydroxide? d. How many grams of the excess reagent remain (are unreacted) after the reaction is complete? 4. Consider the reaction of iron (III sulfate (aq) and sodium phosphate (a) to forrm iron (III) phosphate (s) and sodium sulfate (aq). a. Write the balanced chemical equation for this reaction b. If you perform this reaction with 2.50 g of iron (III) sulfate and excess sodium phosphate, how many grams of iron (II) phosphate can you make? If 2.16 g of iron (III) phosphate are obtained when a student performed this reaction, what is the percent yield? Is the answer from part C reasonable? Assuming no calculation errors were made, give a possible explanation for the answer in part C. c. d.

Answer 1

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