1. 4/4 points Last Response | Show Details All Responses Notes The following addresses safety in the titration curves lab. Put the letter(s) of the chemicals associated with each hazard in the box next to the hazard. If more than one hazard applies, put both letters in the box, in alphabetical order, separated by commas but no spaces. For example, if both hydrochloric acid and sodium hydroxide are corrosive, the entry should be C,D. Hazard Chemicalc,d CorrosiveA potassium hydrogen phthalateb ToxicB sodium carbonatea,b IrritantC hydrochloric acide,f None ListedD sodium hydroxideE phenolphthaleinF methyl orange2. 1/1 points Last Response | Show Details All Responses Notes The following addresses waste disposal in the Titration Curves Lab. Choose all of the following that can be flushed down the sink with plenty of water.[x] methyl orange [x] pH 4.00 buffer [x] pH 10.00 buffer [x] phenolphthalein [x] sodium hydroxide [x] hydrochloric acid [x] sodium carbonate [x] potassium hydrogen phthalate3. 3/3 points Last Response | Show Details All Responses Notes The following statements concern techniques involving volumetric glassware used in the Titration Curves experiment. Choose the correct phrase to complete each statement. a. When working with a volumetric pipet, one adjusts the liquid level (_) so the pipet is completely filled with liquid (_) so the top of the meniscus is at the scribed line on the pipet. (o) so the bottom of the meniscus is at the scribed line on the pipet.(_) so the meniscus is at the top of the widened "bubble" in the middle of the pipet. b. When draining the pipet, (o) one allows the liquid to flow out with gravity, then touches the pipet tip to receiving vessel to remove the last drop. (_) one drains the liquid and uses the pipet bulb to blow out any remainingliquid. (_) one inverts the pipet and pours liquid out the top. c. It is good practice to "condition" a pipet before using it by (_) rinsing it with distilled water. (_) making sure it is thoroughly dry. (o) rinsing it with a few milliliters of the solution that will be pipetted. d. A buret should be conditioned, then filled (_) to the top of the glass tube. (o) to slightly below the top scribe mark (0.00 mL). (_) to exactly the top scribe mark (0.00 mL). e. When working with a buret, one should take care that (_) the tube below the stopcock is completely filled. (_) the buret is conditioned by rinsing it with titrant before use. (_) the last drop of liquid on the tip is flushed into the analyte. (o) all these cautions should be observed. f. Burets, pipets, and small volumetric flasks are accurate to about(_) 0.1 mL (_) 1 mL (_) 0.1 g (_) 0.01 g (_) 1 g (o) 0.01 mL4. 7/7 points Last Response | Show Details All Responses Notes Please answer the following questions for Part B: Titration of KHP with NaOH. You may want to record your answers in the Data Collection section of your lab manual for use during the lab. (pKa1(H2P) = 2.950, pKa2(H2P) = 5.408). a) What is the equivalence volume (Veq) when 20.00 mL of 0.20 M KHP is titrated with 0.20 M NaOH? Veq = 20 mL b) What do you expect the pH to be at the midpoint of this titration? pH = 5.41c) Calculate the pH at each of the following volumes of 0.20 M NaOH added to 20.00 mL of 0.20 M KHP. (Hint: Please note that KHP is the intermediate form of phthalic acid, a diprotic acid! It cannot be treated like a typical weak acid.) mL 0.20 M NaOH pH0.004.1810.005.4115.005.8920.009.2022.0011.985. 10/10 points Last Response | Show Details All Responses Notes Please answer the following questions for Part C: Titration of Na2CO3 with HCl. You may want to record your answers in the Data Collection section of your lab manual for use during the lab. (pKa1(H2CO3) = 6.352, pKa2(H2CO3) = 10.329). a) What are the first and second equivalence volumes (Veq1 and Veq2) when 20.00mL of 0.10 M Na2CO3 is titrated with 0.20 M HCl? Veq1 = 10 mL Veq2 = 20 mL b) What do you expect the pH to be at the... first midpoint of this titration? pH = 10.329 first equivalence point of this titration? pH = 8.314 second midpoint of this titration? pH = 6.352c) Calculate the pH at each of the following volumes of 0.20 M HCl added to 20.00 mL of 0.10 M Na2CO3. mL 0.20 M HCl