Ph of c6h5cooh
WebWhat is the equilibrium concentration of C6H5COOH? pH = (Give your answer accurate to 2 decimal places.) Given that p K a = 4.21 at 25 °C for C 6 H 5 COOH, what is the pH of 0.189 mol L −1 C 6 H 5 COONa(aq) at 25 °C? Web测溶液的ph. c． 稀释浓硫酸. d． 蒸发食盐水. 2.下列说法中不正确的是（） a．蜡烛火焰上方放一个瓷碟子，碟子底部有炭黑出现，说明蜡烛中含有碳元素. b．在生煤火炉时，可点燃木柴来引燃煤，是为了改变煤的着火点
Ph of c6h5cooh
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WebApr 16, 2007 · Calculate the change in pH of a 0.400 M C6H5COOH solution when 100.0 ml of a 2.50 M KOH solution is added to 1.000 L of C6H5COOH. For C6H5COOH, Ka = 6.46 X 10^-5. Work Done So Far: We're to determine the change in pH, thus we'll need to find the original pH. Ka = 6.46 X 10^-5 = x^2/ (.4-x) ==> x = .0050511 ==> pH = 2.296 What should I … WebD. C6H5COOH (pKa = 4.21) Step-by-step explanation. Option a: This option is incorrect even if the pKa of the acid is close to 4 with a difference of 0.86. This will not fit in the criterion where the ratio of the base to the acid should be near 1, because the ratio is 7.24, which can be solved using the Henderson-Hasselbach equation ...
WebA solution of benzoic acid (C6H5COOH) that is 0.20 M has a pH of 2.45. What is Ka for benzoic acid? 3.6×10−3 25 6.4×10−5 0.018 6.4×10−5 pH = -log [H+] 2.45 = -log [H+] [H+] = … WebMar 16, 2024 · The pH scale (pH) is a numeric scale used to define how acidic or basic an aqueous solution is. It commonly ranges between 0 and 14 but can go beyond these …
WebMar 10, 2024 · Calculate the pH of a 0.10 M solution of sodium benzoate (NaC6H5COO) given that the Ka of benzoic acid (C6H5COOH) is 6.50 x 10-5. Follow • 2 Add comment Report 1 Expert Answer Best Newest Oldest J.R. S. answered • 03/11/20 Tutor 5.0 (141) Ph.D. University Professor with 10+ years Tutoring Experience About this tutor › WebDec 24, 2024 · pH = 2.96 Explanation: C6H5COOH ↔ C6H5COO- + H3O+ ∴ Ka = 6.5 E-5 = [H3O+] [C6H5COO-] / [C6H5COOH] C6H5COONa → C6H5COO- + Na+ prior to adding C6H5COONa: ⇒ C C6H5COONa = 0 M = [Na+] ∴ mass balance: ⇒ C C6H5COOH = [C6H5COOH] + [C6H5COO-] = 0.0200 M ⇒ [C6H5COOH] = 0.0200 - [C6H5COO-] charge …
WebCorrect option is D) C 6H 5COONa is a salt made from weak acid C 6H 5COOH and strong base NaOH. pH will be determined by the hydrolysis of C 6H 5COONa.
WebIt is in equilibrium with the phenolate anion C6H5O− (also called phenoxide) in aqueous solutions that are within the pH range 5-6. One reason, for why phenol is more acidic than aliphatic compounds, is that it contains an OH … in and out burgers closingWebCalculate the pH at the equivalence point when 25.0 mL of 0.160 M ethylamine, CH 3CH 2NH 2, is titrated with 0.120 M HBr M acid V acid = M base V base 0.120 M . V acid = 0.160 M . 25.0 mL V acid = 0.160 M . 25.0 mL 0.120 M = 33.33 mL 33.3 mL of 0.120 M HBr is needed to reach the end point moles CH 3NH 2 = 0.160 mol in and out burgers florida locationsWebTable of Acids with Ka and pKa Values* CLAS * Compiled from Appendix 5 Chem 1A, B, C Lab Manual and Zumdahl 6th Ed. The pKa values for organic acids can be found in inbody analysis interpretationWebApr 9, 2024 · pH = pKa + log [A−] [HA] where A− is the benzoate and HA is the benzoic acid. The ratio is then... 4.00 = 4.20+ log [A−] [HA] ⇒ [A−] [HA] = 104.00−4.20 = 0.6310 It makes sense; pH < pKa, so the solution is more acidic than if there were equal quantities of benzoate and benzoic acid. Hence, there is more weak acid than weak base. in and out burgers austin texasWebApr 9, 2024 · Explanation: Data given: Molarity of C6H5CCOH = 0.100 M molarity of ca (c6h5coo)2 = 0.2 M Ka = 6.3 x 10^-5 first pH is calculated of the buffer solution pH = pKa+ log 10 pKa = -log10 [Ka] pka = -log [6.3 x10^-5] pKa = 4.200 putting the values to know pH of the buffer pH = 4.200 + log 10 pH = 4.200 + 0.3 in and out burgers food truckWebAug 30, 2024 · Therefore to get the pOH we plug the concentration of OH - into the equation pH=-log (1.5075\times 10 -6) and get pOH=5.82. To get the pH we minus the pOH from 14. pH=14 - 5.82 pH= 8.18 Example 5: After adding 26 mL of 0.3 M NaOH Find the pH after the addition of 26 mL of NaOH. SOLUTION in and out burgers fremont caWebAug 28, 2024 · Which of the following acids (listed with Ka values) and their conjugate base would form a buffer with a pH of 2.34? a. HF, Ka = 3.5 x 10-4 b. ... C6H5COOH. c. HClO2. d. HClO. e. HIO3. only pKa of HClO2 is closest to the target pH of 2.34 and therefore, suitable for the making buffer with pH 2.34. Advertisement inbody analysis machine