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- Calculate the p H of the diprotic acid H2 A (such as H2 SO4) where the dissociation of the first H is strong and the dissociation of the second H is weak but the 5% rule does not apply (K2 is too large relative to the initial concentration of H Aminus). Step 1: H2 A + H2 O → H Aminus + H3 Oplus where K1 is large Step 2: H Aminus + H2 O ⇌ A2 minus + H3Oplus K2 = 0.013 Assume the initial concentration of H2A is 0.0107 M. Hint: The H3 Oplus concentration is not zero when setting up your I C E table for step 2 and be sure to consider the total molarity of H3 Oplus when calculating the p H.In acylation reactions of alcohols with acyl chlorides, external amine such as triethylamine (Et,N) or pyridine are used. Which statement about these additives is incorrect They scavenge HCI O They act as a Lewis base They can be used as a solvent They deprotonate the alcohol to form alkoxideCalculate the p H of the diprotic acid H2 A (such as H2 SO4) where the dissociation of the first H is strong and the dissociation of the second H is weak but the 5% rule does not apply (K2 is too large relative to the initial concentration of H Aminus). Step 1: H2 A + H2 O → H Aminus + H3 Oplus where K1 is large Step 2: H Aminus + H2 O = A² minus + H3Oplus K2 = 0.012 %3D Assume the initial concentration of H2A is 0.0133 M. Hint: The H3 Oplus concentration is not zero when setting up your I CE table for step 2 and be sure to consider the total molarity of H3 Oplus when calculating the p H.
- Is sodium benzoate strong enough of a base to deprotonate HCI? What information led you to the answer to this question?Place the following fictitious monoprotic acids in order of decreasing acidity.HX 2 (pk a = 5.5408)HE 5 (pk a = 3.0557)HT (pk a = 5.1609)Choose a reagent that will separate the cations in the following pair: Mn²+ and Fe³+ NaOH, 1M NaOCI and 6M NH3 6M Acetic acid 6M HNO3 NaOH NaBiO3 Question 6 Choose a reagent that will separate the cations in the following pair: Mn²+ and Cr³+ NaOH 6M Acetic acid 6M HNO3 KSCN
- Show that HSO4- is an amphiprotic substance using two different, balanced chemical reactions. State the function of HSO4- in each reaction.Determine whether the given salt will undergo hydrolysis or not. Write: YES or NO (Note: case & space sensitive) K2C204Lola and Richie were tasked to analyze the acidity of a 10.0-mL fermented milk sample diluted with water in a 250-mL volumetric flask. Mola obtained a 15.0-mL aliquot of this solution, diluted it to 50.0 mL, and then titrated this diluted sample. Titration data were given to Rity and she found out that the 50.0-mL sample contains 0.21 mmol of lactic acid. MW: Lactic Acid (90.08)1.What is the lactic acid concentration (in M) of the titrated sample?2. Determine the lactic acid content (in M) of the 10.0-mL fermented milk sample.3. What is the lactic acid concentration (in %w/v) of the 10.0-mL fermented milk sample?
- O pKa = logKa QUESTION 8 The neutralization constant K n for the neutralization of acetylsalicylic acid (C gH 80 4) and codeine (C 18H 21NO 3) is 4.8 x 10 4. The acid dissociation constant Ka for acetylsalicylic acid is 3.0 x 10 4. What is the base dissociation constant Kb for codeine? 1.4 x 1015 4.8 x 10-24 6.3 x 10-23 1.6 x 10-6 QUESTION 9 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All A MacBook Air DII DD 吕0 O00 F6 F7 F8 F9 F10 F2 F3 F4 F5 %23 %24 & 3 4. 6. 7 8.HC H 36 46 15:11 29.0 ןו:5ר הה" HB/s Assignment 2.pdf 1. Identify the acids and bases in the following reactions: (a) CH3OH + H - CH,OH2 (b) CH3OH + NH2- - CH30- + NH3 Žnca +o (c) + ZnClz H3C HyC H 2. Rank the following substances in order of increasing acidity: H H C0H он H CH3CH. CH3CCH,CCH, CHyCOH Pentane-2,4-dione (pK, = 9) Phenol (pk, = 9.9) Acetone Acetic acid (pk,- 19.3) (pk, = 4.76) 3. List the following carboxylic acids in order from strongest acid to weakest acid: CH,CH;CH;COOH K,-1.52 x 10- CICH CH;CH;COOH K,-2.96 x 10 CH,CH;CHCOOH CH,CHCH;COOH ČI K1.39 10 K-8.9x 10 4. For the following compound, a. draw its conjugate acid. h. draw its conjugate base. H,NCH,COOH 5. List the following compounds in order from strongest acid to weakest acid: CH CH,COOH CH,OH CHCIOH 6. Which of the following are likely to act as Lewis acids and which as Lewis bases? Which might act both ways? (a) CH3CH,OH (b) (CH3)2NH (e) H3C+ (c) MgBrz (D (CHahP (d) (CH3)B IIINaHCO3 can deprotonate benzoic acid but cannot deprotonate phenol. On the other hand, NaOH can deprotonate both benzoic acid and phenol. Given this information, rank the molecules numbered I to V in order of decreasing acidity. COH cOH он H,0 H,CO, IV CH3 II I II (A) V > II >I > III > IV (В) II > 1 > V > III IV (C) II > V >I > IV > II