WebMar 7, 2024 · First Ionization: Determine the concentrations of H 3 O + and HCO 3 −. Since equilibrium step 1 is has a much bigger K a 1 = 4.3 × 10 − 7 than K a 2 = 4.7 × 10 − 11 for equilibrium step 2, we can safely ignore the second ionization step and focus only on the first step (but address it in next part of problem).WebMar 19, 2024 · Ka = [H3O+][A−] [HA] And for a general base that grabs one proton... A−(aq) + H2O(l) ⇌ HA(aq) +OH−(aq) Kb = [HA][OH−] [A−] Now what if we do this... KaKb = [H3O+][A−] [HA] [HA][OH−] [A−] = [H3O+][OH−] That looks just like Kw. ⇒ Kw = KaKb Therefore, since Kw = 10−14 at 25∘C ... Ka = Kw Kb = 10−14 Kb =??? Answer link

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WebFor an estimate of p Kaaq (H 3 O + ), Burgot suggests taking the measured value p KaEtOH (H 3 O +) = 0.3, the p Ka of H 3 O + in ethanol, and applying the correlation equation p Kaaq = p KaEtOH – 1.0 (± 0.3) to convert the ethanol p Ka to an aqueous value, to give a value of p Kaaq (H 3 O +) = –0.7 (± 0.3). [12]WebThe Ka for H3O+ would be defined as Ka = [H+] [H2O] / [H3O+] . But [H+] is the same as [H3O+] , so Ka = [H2O] = 55.5 , or pKa = -1.7 . 2. The pKa of CH3OH2+ (protonated methanol) is -2.2. Predict the preferred direction of an equilibrium acid-base reaction between H3O+ and CH3OH. CH3OH + H3O+ <===> CH3OH2+ + H2Oefmd gamification course

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WebFor an estimate of p Kaaq (H 3 O + ), Burgot suggests taking the measured value p KaEtOH (H 3 O +) = 0.3, the p Ka of H 3 O + in ethanol, and applying the correlation equation p …WebDec 2, 2024 · As noted above, [H3O+] = 10-pH. Since x = [H3O+] and you know the pH of the solution, you can write x = 10-2.4. It is now possible to find a numerical value for Ka. Ka = (10-2.4)2 / (0.9 – 10-2.4) = 1.8 x 10-5. What is the pKa of HCl? Hydrochloric acid (HCl): pKa = -6.3. See also what is annex 11 Why is HCl the strongest acid?WebSep 15, 2024 · H3PO4/H2PO4^- is the acid/conjugate base pair. H2O gained a proton to form H3O^+; therefore, H2O is the base and H3O^+ is its conjugate acid. The H2PO4^- ion is named dihydrogen phosphate ion. What is the equation for Ka? The numerical value of Ka is used to predict the extent of acid dissociation. A large Ka value indicates a …contingency\u0027s 9t