Prepare a spreadsheet for the titration of 48.2 ml of 0.2025 M H2L with 0.1012 M N2OH, pKa1-3.65 and pka2-8.03 Answef the following question based on your spreadsheet. 1. The first equivalent point is achieved at the addition NaOH with volume = mL 2. The second equivalent point is achieved at the addition NaOH with volume =| mL 3. Before the addition of strong base, the pH

Prepare a spreadsheet for the titration of 48.2 ml of 0.2025 M H2L with 0.1012 M N2OH, pKa1-3.65 and pka2-8.03 Answef the following question based on your spreadsheet. 1. The first equivalent point is achieved at the addition NaOH with volume = mL 2. The second equivalent point is achieved at the addition NaOH with volume =| mL 3. Before the addition of strong base, the pH

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter15: Additional Aqueous Equilibria

Section: Chapter Questions

Problem 110QRT: Consider the nanoscale-level representations for Question 110 of the titration of the aqueous weak...

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Consider the following four titrations. i. 100.0 mL of 0.10 M HCl titrated by 0.10 M NaOH ii. 100.0 mL of 0.10 M NaOH titrated by 0.10 M HCl iii. 100.0 mL of 0.10 M CH3NH2 titrated by 0.10 M HCl iv. 100.0 mL of 0.10 M HF titrated by 0.10 M NaOH Rank the titrations in order of: a. increasing volume of titrant added to reach the equivalence point. b. increasing pH initially before any titrant has been added. c. increasing pH at the halfway point in equivalence. d. increasing pH at the equivalence point. How would the rankings change if C5H5N replaced CH3NH2 and if HOC6H5 replaced HF?
If 55 mg of lead(II) sulfate is placed in 250 mL of pure water, does all of it dissolve? If not, how much dissolves?
Consider the nanoscale-level representations for Question 110 of the titration of the aqueous weak acid HX with aqueous NaOH, the titrant. Water molecules and Na+ ions are omitted for clarity. Which diagram corresponds to the situation: After a very small volume of titrant has been added to the initial HX solution? When enough titrant has been added to take the solution just past the equivalence point? Halfway to the equivalence point? At the equivalence point? Nanoscale representations for Question 110.
0.915g of KHP (204.22g/mol) was dissolved in 100ml of distilled water and titrated euth sodium hydroxide solution. 27.55ml titrant was needed to reach the equivalenec point. There is 0.00448 moles of KHP present in the sample. a) How many moles of sodium hydroxide are needed to neutralize each mole of KHP? b) Therefore, how many moles of NaOH were needed to neutralize the KHP sample? c)What is the molar concentration (mol/L) of the sodium hydroxide solution?
In the experiment conducted to determine the amount of acetic acid in vinegar, 8.2 mL of NaOH standard solution adjusted to 0.098 M was spent besides the phenolphthaleley indicator. Accordingly, which of the following is the amount of acetic acid in the vinegar sample in grams? (Ma (CH3COOH): 60.05 g/mol) A. 0.048 B. 0.024 C. 0.096 D.0.072
In the experiment conducted to determine the amount of acetic acid in vinegar, 8.2 mL of NaOH standard solution adjusted to 0.098 M was spent besides the phenolphthaleley indicator. Accordingly, which of the following is the amount of acetic acid in the vinegar sample in grams? (Ma (CH3COOH): 60.05 g / mol)
. A 4.59 mL sample of HCl, specific gravity 1.3, required 50.5 mL of 0.9544N NaOH in a titration. Calculate the % w/w HCl.
How do i determine the ml of KOH? (Picture posted) A student used 9.925 x 10-2 mol/L hydrobromic acid to standardize an aqueous solution of potassium hydroxide and obtained the following titration data using phenolphthalein as an indicator: Concentration of HBr used: 9.925 x 10-2 mol/L Volume of HBr used: 25.00 mL Indicator: phenolphthalein Endpoint colour change: colorless to pale pink
Answer the following three questions based on the information given below. Consider a buffer made with 34.0 mL of 0.25 M butanoic acid (HC4H-O2) and 16.0 mL of 0.46 M sodium butanoate (NAC4H7O2). The K, for butanoic acid (HC H-O,) is 1.5 X 10 5. Round all numerical answers to the 100en place (2 decimal places). Assume 298 K. What is the pH, if 20.0 mL of 1.0 M NAOH is added to this buffer? Type your answer..
How many moles of sodium thiosulfate pentahydrate are used in the titration? (use average volume of titrations). average volume of titrations = 56.65 mL MW of sodium thiosulfate pentahydrate = 248.1864 g/mol 0.62 g of sodium thiosulfate pentahydrate = 0.01 M we have a 0.01 M sodium thiosulfate pentahydrate solution in a 250 mL volumetric flask.
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What is a primary reason for needing to standardize strong base titrants like NaOH and KOH? 1)Standardization is the process of dissolving NaOH or KOH in aqueous solution.2)NaOH and KOH are both inexpensive, highly soluble, and easy-to-use bases.3)Standardization is the process of reacting a strong base like NaOH or KOH with an acid.4)NaOH and KOH both react with moisture in the air thereby making accurately-determined concentrations of their solutions difficult.5)NaOH and KOH are not very soluble in aqueous solutions making the concentrations difficult to determine.