For the following reaction for the synthesis of phosphorous acid: (5pts) ___PCl3(l) + ___H2O(l) ___H3PO3(aq) + ___HCl(aq)
- For the following reaction for the synthesis of phosphorous acid: (5pts)
___PCl3(l) + ___H2O(l) ___H3PO3(aq) + ___HCl(aq)
1.1. Balance the equation:
1.2. Determine how many moles of H2O are required to react completely with
4.90 moles phosphorus trichloride:
1.3. Determine how many moles of phosphorous acid are formed from 4.90 moles phosphorus trichloride (assume more than enough water present):
1.4. Determine how many moles of hydrochloric acid are formed from 4.90 moles phosphorus trichloride (assume more than enough water present):
1.5. Suppose we start the reaction with 100.0 g of phosphorus trichloride (assume more than enough water present), what mass (in g) of phosphorous acid can be synthesized:
Name_______________________________________________ Date:_______
- The reaction used for the synthesis of aspirin is shown below. In this reaction, an excess of acetic anhydride (C4H6O3) is added to a measured mass of salicylic acid (C7H6O3) in the presence of a catalyst. The products of the reaction are acetylsalicylic acid, aka aspirin (C9H8O4) and acetic acid (C2H4O2).
2.1. True or False:
This is a balanced chemical equation
2.2. Calculate the molar masses of all reactants and products (pay attention to significant figures:
Compound Chemical Formula Molar Mass (g/mol)
Salicylic acid
Acetic anhydride
Aspirin
Acetic acid
8
pts
2.3. What mass (in g) of acetic anhydride is required to completely react with
25.0 g salicylic acid?
2.4. The protocol in the lab calls for starting the reaction using 25.0 g salicylic acid and 32.0 g acetic anhydride.
2.4.1. Find the limiting reactant
2.4.2. Identify the excess reactant
Name_______________________________________________ Date:_______
2.4.3. Calculate the theoretical yield of aspirin (in g)
2.4.4. Assume that after completing the reaction we collected 29.5 g of aspirin.
Calculate the percent yield for the reaction.
- 1te the molarity of a solution made by dissolving 3.2 mol of glucose (C6H12O6) to obtain 1.10 L solution
-
What volume of 0.200M ethanol solution contains 1.22 mol ethanol?
BONUS QUESTION:
A chemist wants to make 7.2L of 0.350 M CaCl2 solution. What mass of CaCl2 in grams should the chemist use?
1 pt
1 pt