Which data point(s) reflect pH = pka? 14 12 10 (iv) PH 6. (iii) (ii) 4. (i) 10 15 20 25 30 35 40 Volume (mL) () and (i) (ii) only O (i) and (iv) O (i) only 5,
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- how do i find x？overall aden fn tereactiorabwe! .20 what is te overall aae for tereactrobre! 200 0.00 8.00xl0 1. 0. 1000 200x1o? Trual A +BSAB On 12For alanine, Ka1=5.1105,Ka2=1.81010 . Calculate the ratios [Z]/[C+] and [Z]/[A+] at pH (a) 2.00. (b) 6.00. (c) 10.50. What is the principal species at each pH?
- Content Google Do google slid X Inbox (4,5 ✓ Certificate ☑ > Course EX Cengage L x b Content G ☑ OWLv2|0 x ChatGPT × + C prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator-assignment-take 口 New Chrome available : E4 CH 16 17 and 18 Question 1 1 pt This question has multiple parts. Work all the parts to get the most points. Question 2 2 pts Question 3 1 pt a Consider the reaction of NO and Cl₂ to produce NOCI. Question 4 2 pts 2 NO(g) + Cl2(g) → 2 NOCl(g) Question 5 1 pt What is AS (system) for this reaction? Question 6 × 2 pts Compound S° (J/mol K) . Question 7 NO(g) 210.76 1 pt Question 8 2 pts Cl2(g) NOCI(g) 223.08 261.8 Question 9 1 pt AS (system) = -121 J/K⚫ mol-rxn Question 10 2 pts Question 11 1 pt b Does AS (system) change with temperature? Question 12 1 pt yes Question 13 1 pt no Question 14 1 pt Submit Question 15 1 pt Progress: 9/15 items Due Apr 14 at 05:00 PM Finish Assignment Submit Answer Try Another Version 2 item attempts remaining…5. (1) (ii) Ibuprofen (206.3 g/mol) absorbs at 255 nm and shows a molar absorptivity of 3010 L/mol.cm. A tablet of ibuprofen, 0.6654 g, was ground and 0.2203 g powder was dissolved in 20% methanol in a 100 mL volumetric flask (Solution A). Exactly 5.0 mL of Solution A was diluted in a 50.0 mL flask and the resulting solution showed an absorbance of 0.1228 AU in a 1.00 cm cell. (i) What is the concentration (mol/L) of ibuprofen in the 100 mL stock solution? (ii) Report the amount of ibuprofen in mg/Tablet. Ibuprofen H3C | HCCH; 1 H3C CH3 -CH-COOHprelab2/3: please see attached wavelength is: 475 nm for blue light.
- pls help make a flow chartg 2.png Average absorbance, .129 +0.128 +0.127)/3 = 0.128 Chrome Concentration of Females of Fe volume Q Molarity of Fe(NO₂)) = 0.2M Volume of Fe(NO₂)); = 5.00mL Moles of Fe³+= Molarity x Molarity x volume(L) Moles of Fe³* = 0.2M x 0.0054 = 10³mole 10-mole 500 x 10-3=0.002M [Fe³+] = [SCN¯] = X = ✪ [Fe³] = 0.002mol/L nknown concentrations to determine [FeSCN]at equilibrium in solution 8: Y = 4290X - 0.068 72% (0.127 + 0.068) 4290 0.127=4290X - 0.068 25ml Fe³+ x 0.002 mol/L-¹ 100mL 100% = 4.5 x 10-5mol/L 20ml SCN X 0.002 mol/L-¹ 100mL = 5.00 x 10^4 mol/L^-1 = 4.00 x 10 mol/L-1 W Flask 8 Flask 9 Flask 10 Flask 11 3.png 4.png Part 3: Q8 Flask 8 Flask 9 Flask 10 Flask 11 Part 3: 09 Flask 8 Flask 9 Flask 10 Flask 11 [Fe³+ (mol/L) 5.00 x 10-4 5.00 x 10-4 5.00 x 10-4 5.00 x 10-4 Average absorbance 0.127 0.166 0.222 69% 0.308 100% [FESCN¹ (mol/L) 4.5 x 10- 5.4 x 10 6.76 x 10-5 8.76 x 10- [SCN (mol/L) 4.00 x 10-4 4 x 10-4 7 x 10-4 1x 10-³ 3 7.png Place the results from calculations 9 and 10 into…ALEKS - Rafia Riaz - Knowledge CX b Answered: Order these chemical X b M Gmail T (10) Pyari Mona - Epis X M Inbox (1,691) - rrafia360@gmail.c X Ghi0 relative pH - Google Search www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-lvdw7xgLCkqMfg8yaFKbD9GafJstkYLIJnusuqH-p1X_sK5Jf4E3cmXkMkyF9tYadmgkkpbMT2ejVO2limOXTcRDH8UEjl_2?10Bw7QYjlba... M Gmail T YouTube Maps GTranslate Initial Knowledge Check The vapor pressure of Substance X is measured at several temperatures: 0 temperature vapor pressure 52. °C News 63. °C Type here to search 74. °C I Don't Know 0.0803 atm 0.124 atm College information 0.188 atm Use this information to calculate the enthalpy of vaporization of X. Round your answer to 2 significant digits. Be sure your answer contains a correct unit symbol. Submit A 0 μ x10 ロ・ロ X 00 Question 24 H © 2023 McGraw Hill LLC. All Rights Reserved. X Terms of Use 34°F + Privacy Center Rafia olo Ar Accessibility x Other bookmarks 10:29 PM 1/31/2023
- Calculate e° values for the galvanic cells based on the following overall reactions. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.100 MASS SPECTRUM 80 60 40 20 0.0 10 20 30 40 50 60 m/z NIST Chemistry WebBook (https://webbook.nist.gov/chemistry) 1. What is the M'? 2. What is the m/z of the base peak? 3. Does it contain chlorine? Explain your answer. Rel. IntensityX ch b Answered: Determine the pH du X + agage.com/static/nb/u/evo/index.html?deploymentid=55750823468596024212874980&eISBN=9781305657571&snapshop=30540668d-155276463... 2 req 2 req 2 req 2 req 2 req R MindTap-Cengage Learning X Back F4 shown below. Design a buffer that has a pH of 7.19 using one of the weak base/conjugate acid systems Weak Base CH3NH2 C6H1503N C5H5N $1 5 6. Prepare Buffers by Direct Addition: This is group attempt 1 of 5 Si grams weak base How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide salt of conjugate acid = 96 T F5 Kb 4.2×10-4 5.9x10-7 STE Conjugate Acid Ka CH3NH3 2.4×10-11 C6H1503NH+ 1.7×10-8 1.5x10-9 CsH5NH+ 6.7x10-6 F6 6 = Y X + F7 & 7 + Autosaved at 10:38 PM W F8 8 X F9 019 ( pka 10.62 7.77 5.17 9 F10 ☀- ) F11 0 @ F12 Regenerate Group (4) @ 1 Insert Next 10:38 11/3/2 PrtSc