Question

3943 ss Trial 2 Trials Table 1: Standardization Data 1.4444 Trial 1 4386 A. Determination of th Vinegar is a solution of that an aqueous aceti experiment, you will to OML Mass of KHP Initial burette reading Final burette reading Lont Om 1912 10.2 q mL 9 mL 10.2 1. Set up a clean, 2. Use the autodis 3. As on day 1, a endpoint (a fic T 10.2 Volume of base used p and the trant Table 2: Titrati Data Analysis: 1. White a balanced molecular equation (with phases of course) for the reaction between the RHP. Volume e Initial b- clude phant Final 2. Write the net ionic equation for this reaction (note that HC H40 is a weak acid). Be sure to include Volu dit no other methods 3. Calculate the molarity of base for each trial. You must use dimensional analysis to get any credit - or short cuts will be accepted, so show all unit conversions (hint start with grams of KHP used). Trial 1: Trial 3: Trial 2: Wone of the trials offers significantly from the others, consult your instructor 4. Calculate the average molarity of the base: Average: USE THIS AVERAGE MOLARITY OF THE BASE FOR THE DATA ANALYSIS ON PAGES 3 & 4 6. Using dimensional analysis, calculate how many mg of KHP would react with 14.85 mL of your base:

help me answer questions 1-5

Answer 1

1) The reaction that occurs is:

H2C8H4O4 + NaOH = NaHC8H4O4 + H2O

2) The NIE that occurs is:

HC8H4O4- + Na + = NaHC8H4O4

3) The molarity is calculated:

M = g / MM * V = 0.4444 g / 204.22 g / mol * 0.0102 L = 0.213 M

Trial 2: 0.187 M

Trial 3: 0.211 M

4) The average is: 0.204 M

5) The mass of KHP is calculated:

m KHP = 0.204 M * 0.01485 L * 204.22 g / mol * 1000 mg / g = 620 mg KHP

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