
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Order these steps for how you will determine pKa of a weak acid using a titration curve? (from 1 to 4)
____ Identify the volume of base required to reach the equivalence point.
____ Identify the pKa of the acid as the pH at the half-equivalence point.
____ Calculate the volume of base required to reach the half-equivalence point.
____ Identify the pH at the half-equivalence point.
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- Please step by step answer and current answer pleasearrow_forward4. A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 \times 10-4) with 0.10 M NaOH.a. Does the solution contain a strong acid with a strong base, a strong acid with a weak base, a weak acid with a strong base, or a weak acid with a weak base? (1 point) b. Estimate the pH at the equivalence point. Will it be equal to 7, greater than 7, or less than 7? Explain. (1 point) c. What is the pH after 20.0 mL of the 0.10 M NaOH is added? Show all calculations. (3 points)arrow_forwardacetic acid is a: ______ strong acid, strong base, weak acid, or weak base?? (Circle one) What should be the equivalence point pH be for this experiment? less than 7, equal to 7, pr greater than 7?? (Circle one) Why is the half-equivalence pH (and half-equivalence volume) important in this titration? Explain. From the graph, estimate the half-equivalence volume: ________________ mL From the graph, estimate the half-equivalence pH: ________________ Using these values, calculate the value of Ka for acetic acid: ________________ Acetic acid has a known Ka of 1.8 x 10-5 via the literature. Find the percent error for this experiment. Recall: Percent error = absolute value{(actual - experimental)/ actual}*100%arrow_forward
- QUESTION 5 When titrating a strong monoprotic acid and KOH at 25°C, the O pH will be equal to 7 at the equivalence point. titration will require more moles of base than acid to reach the equivalence point. O pH will be less than 7 at the equivalence point. pH will be greater than 7 at the equivalence point. titration will require more moles of acid than base to reach the equivalence point.arrow_forwardI need help with all parts of 6arrow_forwardIn the titration of HF with NaOH, which species are present at the equivalence point? O HF, NAOH, and H20 only O NaF, NAOH, and H20 only O NaF, HF, and H20 only O NaF and H20 only O HF and H20 onlyarrow_forward
- #5 could you circle answers pleasearrow_forwardfor pH titration lab! please helparrow_forwardIn lab, you measure out 13.20 mL of 1.18M phosphoric acid to titrate with KOH. What volume (in mL) of 0.848 M KOH is required to reach the first equivalence point? Give your answer to one decimal place. Your Answer: Answerarrow_forward
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