reaction: NaHCO3(aq) + HCl(aq) ® NaCl(aq) + CO2(g) + H2O(l) How would your results be affected if the residue in the beaker wasn’t completely dry?
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reaction: NaHCO3(aq) + HCl(aq) ® NaCl(aq) + CO2(g) + H2O(l)
How would your results be affected if the residue in the beaker wasn’t completely dry?
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- ALL INFORMATION NEEDED IS PROVIDED, I NEED FIRST QUESTIONS ANSWERED FIRST BEFORE OTHERS CAN BE ANSWEREDRate = -(Delta[RCl])/Delta t andln[RCl]t=-k*t+ln[RCl]0 < [R-Cl]-time equation Test tube A = 0.30 of 0.10M NaOH(aq), 6.70ml DI H2O & 1 drop of bromophenol bue Test Tube B = 3.00M of 0.10M R-CL in acetone. Mix together in 3 water baths Bath A Trial 1= 20C, 53.6s Trial 2= 20C, 49s for color to changeBath B Trial 1= 32C, 18s Trail 2= 32C, 20s Bath C Trial 1= 10C, 204s Trial B= 10C, 200s average out both trials for each bathcolor change happens after 10% of R-Cl has reacted so In terms of R-Cl this means that 10% of the R-Cl has reacted and ____ of the R-Cl is left Q1. at the time of the color change [R-Cl]t=____[R-Cl]o (Fill in the blank) Q4. Substitute the value of [R-Cl]t into appropriate equation listed above and solve for k in terms of [R-Cl] and t. Q5. Use average time for each temp and determine the value of k (with units) at each temperature Q6. Rearrange the Arrhenius…The polyprotic acid, H3X, has acid dissociation constants Ka1 = 1.3×10-1, Ka2 = 6.5×10-4, and Ka3 = 3.3×10-5. What is the Kc value of the following reaction at 25°C?HX2−(aq)+OH−(aq)⇋X3−(aq)+H2O(l)HX2−(aq)+OH−(aq)⇋X3−(aq)+H2O(l)Report your answer to two significant figures using E notation.The base B has pKb 4.00. Find the fraction in the form B and the fraction in the form BH at pH (a) 9.00; (b) 10.00; (c) 10.30.
- What is the property of Al(OH)3 which, when reacting with organic dyes, serves as confirmatory test?The following flow chart outlines an acid/base extraction of two compounds. Identify which compound corresponds to each letter G - L. Match the appropriate structure number to the corresponding letter box. Possible answers 1- 7 are given in the bank below the flow chart; some maybe used more than once and not all may be used.Report your ratio/answer as a decimal. The pKa of acetic acid is 4.75. What is the ratio of the concentration of sodium acetate to the concentration of acetic acid at pH 5.75? [sodium acetate] [acetic acid]=
- 1. Which of the following is the best primary standard for the standardization of NaOH?a. KHPb. Glacial Acetic Acidc. Ascorbic Acidd. HCl acid solution 2. Which of the following is the best primary standard for the standardization of HCl?a. Na2CO3b. NaOHc. NaHCO3d. KHP1.95 grams of ethanolamine were dissolved in water, and the pH of the solution was adjusted with HCl until 62% of the molecules were in their protonated (conjugate acid) state. The pKa of ethanolaminium (the conjugate acid of ethanolamine) is 9.5. What is the pH of the final solution? Round your answer to one decimal place (e.g., 2.3) using standard rounding conventions for the last digit.The value of 4-chlorobutanic acid is 3.02 x 10^-5.
- Calculate (to the nearest 0.1%) the proportion of a dose of ebastine (pKa of conjugate acid = 10.3) that will be ionised at pH 7.7. You do not need to include "%" in your answer.Water sample A has a turbidity reading of 555 NTU. If a 50 ppm standard has a turbidity reading of 50 NTU, what is the concentration of the analyte in A that causes the water to be turbid?If the concentration of an acid in solution is 2.2 times larger than the concentration of its conjugate base, and the pH of the solution is 3.5, what is the pKa of the acid? Include the answer to 3 significant figures