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concentration of tri-futylamine is 0.0995M
the concentration of HCl: 0.10084
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- Provide the chemical formulas and the names of the three predominant carbonic acid species indicated by arrows in the image below: Species 1 species 2 Species 3 Explain i) how you can determine the pH range at which a weak acid/conjugate base system will display buffering properties.ii) what is the reason/logic behind the rule applied in i)? and iii) indicate the pH ranges of the carbonic acid system based on the pka values provided above. Provide the chemical equilibrium that describes the carbonic acid buffer system that exists at pH 9.3. Clearly indicate the chemical formulas, identify the weak acid and it’s conjugate base, and the names of the chemical compounds.A. What two compounds would be best to use in preparing a pH 9.0 buffer solution? justify your answer. Assume you have the acids and the sodium salts of their conjugate bases available to you. Answer: The two compounds best fo preparing a buffer solution with a pH of 9.0 would be hydrocyanic (HCN) and phenol (HOc6H5) because their pKa values are 9.40 and 9.80 respectively making their pH levels the closest to 9. B. WHat mass ration of sodium to acid is needed to prepare this buffer? C. Can this buffer solution better resist pH changes from a string acid addition or strong base addition?In a test tube with 0.3 mL of N,N-dimethylaniline, 5 mL of 10% NaOH, 0.4 mL of benzene sulfonyl chloride. Add a few drops of 4M KOH to make sure it is alkaline and use a litmus paper. Let it stand for 10 minutes. Pour 6M HCl dropwise until it acidify. Explain what happens to the mixture before and after adding HCl. If a precipitate is formed, collect it by filtration or decantation. Test for solubility of the precipitate in 3 mL of 2.5M NaOH. Heat to 50 OC. Shake the tube well for 3 minutes. Explain what happens to the mixture after adding NAOH. N-methylaniline
- What is the equivalence point pH of a 0.1M solution of phenylalanine that is fully titrated with NaOH?An employer is interviewing 4 applicants for a job as a laboratory technician and askseach of them how to prepare a buffer solution with a pH close to 11.000.Use these ka’s to help you: Show your workPropionic Acid, CH3CH2COOH, ka = 1.34 x 10-5 Ethanamine, CH3CH2NH2, kb = 6.3 x 10-4 Jung says he would mix CH3CH2COOH & CH4CH3COOHDominique says she would mix CH3CH2 NH2 & CH3CH2COOHJoshua says he would mix CH3CH2COOH & CH3COONaKyla says she would mix CH3CH2NH2 & CH3CH2NH3BrWho would you hire based on their ability to make a buffer?_________________________What volume (mL) of 0.2173M NaOH is required to titrate 50.00mL of 0.2980M HCI ?In the titration of 50.00mL of 0.2980M HCl. 71.93mL of 0.2173M NaOH was required to reach the phenolphthalien endpoint. Calculate the percent error between the predicted amount and the experimental amount. What does this tell you about the concentration of the NaOH? This is based on your answers to questions 1 and 2. Question 3 options: The concentration of the NaOH is 0.2173M. The concentration of the NaOH is stronger that 0.2173M. Nothing new The concentration of the NaOH is weaker than 0.2173M. Please answer fast i give upvote.
- Write the balanced equation for each reaction and calculate the equilibrium constant for each reaction 1 .The reaction describing the molar solubility of BaCO3 in a strong acid, given that carbonic acid is one of the products.2 . The reaction describing the molar solubility of Sn(OH)2 in a strong acid.3. The reaction describing the molar solubility of AgCN in a concentrated NaCN solution, given that the dicyanoargentate(I) ion forms under these conditions.Standard solution : 0.201 grams of acetylsalicylic acid was combined with 10 mL of 0.5 M NaOH, then transfered to a 100 mL flask and filled the rest of the way with water Then 0.500 mLs of the standard solution was transfered to a 10.00 mL flask and diluted to the 10 mL mark with 0.02 M of buffered iron chloride. Number of moles of NaOH = 0.005 moles Since the reaction between acetylsalicylic acid and NaOH is a 1:1 reaction, the number of moles of acetylsalicylic acid used in the reaction is also 0.005 moles. the concentration from analysis question 5: acetylsalicylic acid in the 100.00 mL volumetric flask is 0.050 M. From your plot, what is the value of εb? From the Beer- Lambert law For the aspirin sample, calculate the concentration of acetylsalicylic acid present using the value of εb that you found The concentration from analysis question 5 represents the concentration in the 10.00 mL sample that was prepared in the volumetric flask using an aliquot of the solution in the…A cleaning product has 10.0 % oxalic acid (H2C2O4, pka1=1.42, pka2=4.4) as one of the ingredients. How many mL of the sample will you use to do titration with 0.50 M NaOH, such that volume of titrant will be 50.0 mL at the phenolphthalein endpoint?Please show complete step-by-step solution.