i need help with these three questions Incorrect Question 2 0/1.25 pts 0.678 g of KHP...
Questions: 1. 495 mg of dried KHP is dissolved in 35 mL of distilled water and titrated with potassium hydroxide (KOH). If it took 22.02 mL of KOH to reach the endpoint, determine the concentration of KOH. Show calculations. If you forgot to dry the above KHP sample and it was later determined to contain 5.00 % water by weight, what would be the actual concentration of the KOH, taking into account the water content? Show calculations. 2. If you...
I MAINLY NEED HELP ON TABLES PLS HELP THANK YOU Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC2H4O4, MW = 204.23 g/mol. Acetic acid, HC2H302, MW = 60.05 g/mol Part 1: Standardization of NaOH Assume 0.951 g of KHP is weighed and transferred to a 250 mL Erlenmeyer flask. Approximately 50 mL water is added to dissolve the KHP. Note that the exact volume of water is not important because you only need to know the...
Please explain the correct answer to all three questions. Thank you! Incorrect Question 11 0/1 pts A 25.0 mL sample of a solution of a monoprotic acid is titrated with a 0.115 M NaOH solution. The titration curve below was obtained. Which of the following indicators would be best for this titration? 12.01 10.0 8.0 pH of solution in flask 6.01 Equivalence Point Indicator methyl orange methyl red bromocresol purple bromthymol blue thymol blue phenolpthalein pka 3.46 5.00 6.12 7.10...
I need help with question #1 and 2 under Post Lab based on the Data Table 1. I appreciate the help. 4. Complete Data Table 1. The neutralization reaction between HP and NaOH : 1o Espon por Adobe PDF KHC,H,O (aq) + NaOH(aq) + KNBCH40 (aq) + H301) Data Table 1. Standardization of NaOH solution Trial 1 Trial 2 Trial Volume of 0.500 M KHP, ml 41.552mL 41.276m 39.169 mL Buret reading before titration, mi. 2.00 2.00 ML 2.00ml Buret...
CHEM LAB hello can someone help me come up with a procedure for this lab it is an standarization of acid and base solution • Each student will receive approximately 100 mL of an unknown HCl. The approximate concentration of HCl will be 0.1 M or 1.0 M. There will be a common container with NaOH. The approximate concentration of NaOH will be 0.1 M or 1.0 M. You will be given the approximate concentrations of NaOH and HCl on...
Please explain the correct answer for both questions. Thank you! Incorrect Question 5 0/1 pts A 25.0 mL sample of 0.723 M HCIO4 is titrated with 0.27 M KOH solution. The H30* concentration after the addition of 80.0 mL of KOH is M. (Cl is chlorine, not carbon and iodine) 0.4 3x10-13 1x107 0.7 4x10-2 Incorrect Question 6 0/1 pts What could be the pKof this weak acid according to the titration curve below? Weak Acid Titration Curve PH 10...
i need help with all these questions please Question 23 4 pts Which of these liquids is most likely to have the lowest (slowest) rate of evaporation (g/min) and why? Select the single best answer. H H H HH :01 IH terbaru H 11 HHH cnc- 7 H H H ica H 나 Hit 4 c B A ΟΟΟΟΟΟ C, because it has the highest molar mass. A, because this molecule has the lowest molar mass.. B, because it has...
please help After answering these questions, enter your answers in Bb The system has been setup for 2 attempts. If for any reason, the system fails, write your answers on this page, tear out the page from the manual and give this to your TA before prelab lecture starts. You are allowed up to two paper submission per quarter. 1. What is the proper reading of the buret shown? Question 1 answers 20.5 ml 19.44 ml 19.5 ml 19.6 mL...
I need help with the post lab questions based on the Data Table. whatever u can provide I would really appreciate it. thank you 5. Complete Data Table 2. The neutralization reaction between ascorbic acid and NaOH is: HC,H,Os(aq) + NaOH(aq) - NaCH-04(aq) + H200) Data Table 2. Titration of an Ascorbic Add Solution Trial 1 Trial 2 Trial 3 Volume of ascorbic acid solution, ml 50.00 mL so.com so con NaOH buret reading before titration, ml 0.00 ml 5.23...
I need it right now, please help me?? PROCEDURE PART I: DILUTING THE VINEGAR SOLUTION The vinegar solution must be diluted by a factor of 5 to be suitable for titration. 1. Obtain - 20 ml of the stock vinegar solution from the fume hood. 2. Using the 10-ml. pipet, pipet" 10 mL of the stock solution to a 50-ml volumetric flask. 3. Fill the volumetric flask to the calibration line with distilled water. Be sure not to go over...