EXPERIMENT 7: PRE-LABORATORY Determination of the Dissociation Constant K, of a Weak Acid Pre-Laboratory Review Questions and Exercises DUE BEFORE LAB BEGINS. ANSWER IN THE SPACE PROVIDED. . The following data was collected when a 25.0 ml sample of an unknown acid was titrated witha 1.00 M NaOH solution. pH Data 14 12 0 10 I5 20 25 30 35 mL of base added Volume NaOH pH Volume NaOH pH 2.39 3.08 3.47 3.80 4.40 5.18 5.49 8.25 10.3 11.6 11.8 12.0 12.1 12.2 26 12.5 20 24 24.5 24.9 30 32 34 12.26 Determine K, for the unknown acid. 2. What is the pH of the solution that results when 25.0 mL of o0.125 M NaOH is added to 25.0 ml of 0.250 M HCI? 3. What is the pH of a solution that is 0.40 M in sodium acetate and 0.60 M on acetic acid? (K, for acetic acid is 1.85 x 10-5.)

Q: Equal volumes of two different weak acids are titrated with 14 0.30 M NAOH, resulting in the…

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Q: A 25.0 mL sample of a saturated Ca(OH)2 solution is titrated with 0.028 M HCI, and the equivalence…

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Q: The next 9 questions are related to the titration of 40.00 mL of a 0.0900 M acetic acid solution…

A: The balanced equation for the given titration reaction is,

Q: In a titration of HCl with NaOH, the indicator solution used is called Phenolpthalein and it turns…

A: Phenolphthalein : Phenolphthalein is an indicator which is generally used in acid-base titrations.…

Q: Consider the titration of 20.00 mL of 0.350 M HF with 0.700 M NaOH, and answer the following…

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Q: 100.0 ml of 0.100 M acetic acid is placed in a flask and is titrated with 0.100 M sodium hydroxide .…

A: To calculate the pH in the flask after adding 50.0 mL of 0.100 M NaOH to 100.0 mL of 0.100 M acetic…

Q: A weak unknown monoprotic acid is titrated with a strong base. The titration curve is shown. Find K,…

A: From given graph we can find the half equivalence point at half equivalence point pH = pKa

Q: A 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The…

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Q: The next 9 questions are related to the titration of 20.00 mL of a 0.0750 M acetic acid solution…

A: The balanced equation for the given titration reaction is,

Q: LAD G2 (9g 2 of 5) What % of vinegar is really HC:H3O?? What is the K. of acetic acid? 3. The graph…

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Q: A chemist titrates 20.0 mL of 0.20 M HBRO (see Appendix) with 0.10 M NaOH. What is the pH: a) before…

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Q: 8) A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. The Ka of HF is 3.5 x 10-4. Determine…

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Q: What is the difference between the endpoint of a titration and the equivalence point?

A: Titration is used in analytical chemistry. It is used to determine acid, base, reductant, oxidant.…

Q: Three different acids were titrated with the same solution of sodium hydroxide, NaOH, and the three…

A: Given observations from titration,     Kimmy concludes that acid-2 is stronger than acid-1.…

Q: Calculate the pH of a buffer is prepared by mixing 50.0 mL of 0.100 M HF with 25.0 mL of 0.125 M…

A: Given,  Volume of weak acid, HF = 50.0 mL  Molarity of HF = 0.100 M  Volume of salt, NaF = 25.0 mL…

Q: In a titration of 20.57 mL of 0.1653 M H2SO4, 45.41 mL of a NaOH solution are needed. What is the…

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Q: When titrating a weak acid with a strong base, it is found that the equivalence point happens when…

A: equivalence point of any acid base titration is that point where equal no of moles of both the…

Q: Why do you need a strong analyte to titrate a weak base? Do the analyte and titrant need to be…

A: The objective of this question is to understand the reason behind the need for a strong analyte to…

Q: A 25.0 mL sample of a saturated Ca(OH)2 solution is titrated with 0.023 M HC1, and the equivalence…

A: Calcium hydroxide reacts with hydrochloric acid to form calcium chloride and water. The equation for…

Q: For the H₂SO4 and NaOH titration, the endpoint is ideally reached when a green color is observed. If…

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Q: If a buffer solution contains 2.1 M acetic acid and 2.7 M sodium acetate, what is the pH of the…

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Q: Why is the shape of a titration curve different for the titration of strong acid vs. strong base…

A: The question is based on the concept of titration. we need to draw two different curves for…

Q: Describe the difference in the titration curve between an acetic acid titration and a sulfurous acid…

A: Given: To differentiate in the titration curve between an acetic acid titration and a sulfurous acid…

Q: You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100 M benzoic acid (p?a=4.20) and…

A: Let y mL benzoic acid and (100 – y) mL sodium benzoate are mixed. For acidic buffer solution,  pH =…

Q: 1o5 POH (c) What is the pH at the first equivalence point? (d) What volume of NaOH is needed to…

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Q: A 20.00 mL of of the following acid solutions is to be titrated to the equivalence point using a…

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Q: a 22.1 ml sample of 0.506M formic acid is titrated with 0.506M NaOH. Calculate the pH after the…

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Q: Match the following titration curves. strong base titrated with a strong acid   polyprotic acid…

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Q: 7-The titration curve shown below describes 14.0 10.0 6.0 40 20 0.0 0.0 5.0 10.0 15.0 20.0 25.0 20.0…

A: Following are the titration curves of strong acid , strong base, weak diaprotic base ,weak diaprotic…

Q: Julianna titrated 40.00 mL of 0.25 M methylamine with 0.50 M HCI. The volume of HCI required to…

A: During the titration of methylamine and HCl, equivalence point is reached when 20ml HCl is added.…

Q: Equal volumes of two different weak acids are titrated with 14 0.25 M NaOH, resulting in the…

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Q: 6. If a solution were made of HCI and NaOH, could this solution be used as a buffer? Explain why or…

A: To answer:  If a solution were made of HCI and NaOH, could this solution be used as a buffer?…

Q: Based on the given titration curve, which acid could be involved in this titration? 14 12 10 pH 2.…

A: We can determine acid from nature of curve . The number of equivalence point tell about number of…

Q: A student titrates 20.00 mL of 0.300 M HCN (Ka of HCN = 4.9x10^-10) with 0.200 M NaOH. What is the…

A: When the moles of NaOH added are less than the moles of weak acid present, it will neutralize a part…

Q: 15 16 17 Questions 15-20 refer to the same weak base/strong acid (WB/SA) titration. The K, of…

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Q: Sort the following titrations in order of increasing pH at the equivalence point. Question list (5…

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Q: c) A student titrated 50.0 mL of a 0.10 M solution of a certain weak acid with NaOH. The results are…

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.