Click the Save button in the Buret Zoom View window so the titration data can be saved. Predict what volume (mL) of 0.1104 M NaOH is required to titrate the 15.00 mL of 0.1033 M HAC to the equivalence point. The pH meter is turned on and has been calibrated. Click the Buret Zoom View window to bring it to the front. The lab will open in the Titrations laboratory. Start Virtual Chemlab, select Acid-Base Chemistry, and then select Predicting the Equivalence Point(3) from the list of assignments. In this assignment, you will be given 0.1033 M CH-COOH (acetic acid or HAC) and 0.1104 M NaOH, you will predict the equivalence point, and then perform the titration to check your prediction. To make a titration more efficient and more accurate, it is often important to be able to predict the equivalence point for the titration. In an acid-base titration, this is done by delivering a titrant of known concentration into an analyte of known volume. What would the pH of the buffer you built above be if you added 10.0 mL of 10,0 M HCI to 100.00 mL of your buffer? (HINT: Your pure buffer initially contains the concentrations of acetic acid and sodium acetate determined in Step 9 above.) 'pt-8ġooo moles 6-6: Pred Titrations provide a method of quantitatively measuring the concentration of an unknown solution. What additional substance will you use to ensure to total solution volume is 100.00 mL? mL Volume 1.0 Macetic acid: ml Volume 1.0 M sodium acetate: 3 Use the molarities determined in Step 9 to calculate the volume, in ml, of 1.0 M solutions in the simulation you will use to create a 100.00 mL buffer solution? Enter the volumes in the blanks below. Molarity of acetic acid: M Molarity of sodium acetate: M 10. Enter concentrations in the blanks below. Use the Before Reaction moles and total volume of the buffer solution (100.00 mL) to determine the concentration of acetic acid and sodium acetate you need to create your buffer. ICH3COOH) -0.09 0.0940 02 mol 0.0018 mol Reaction Fable: All values should be in moles! CH.COO + H+ + CH3COOH Before Reaction 0 Added Reaction Final 9. Then use the information in the Reaction Table to determine Before Reaction moles of acetate and enter that value in the Reaction Table below. Use your answer from Step 7 and the ratio calculated in Step 2 to determine Final mole of the acetate ion and record that value in the Reaction Table below.
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