HClag) NaOH (ag) NaHCOҳag) Sample Water ++ ++ ++ ++ ++ ++ Legend: ++ → completely soluble; +→ slightly soluble; - → insoluble OH OH H3C. H,N CH3 OH CHO. butanedioic acid cyclohexane butane-2,3-dione cyclopentanam ine resorcinol 2345
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identify each sample by matching the respective solubility profile with the given structures. Give the Identity and Rationalization.
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- Arrange the following species as most stable in solution to least stable in solution using the K, of their conjugate acids. C6 H;O Ka • ClO, Cio- 1.6 x 10-10 Ka = 1.2 x 10-2 Ka = 3.5 x 10-8 Ka = 1.0 x 10-48 CH5 Most Stable lons 1 | Cio- | CiO, 3. CH3 C6 H5O .... 2. 4.Consider the following reaction: CH, ÇH, + :çi-A-Ci: H,C- A-: H,C- 50 CH3 Based on the reaction above, the reactant which acts as a Lewis base is CAICL CAICIs o(CH);CCI O(CH),C* The product which is a Lewis acid is OAICI O(CH,),cCI CAICI o(CH)C" The following salts can replace AICla in the reaction, except OBeCl OMgCl OFeCl ocrCls(a) Given that Ka for acetic acid is 1.8 x 10-5 and that forhypochlorous acid is 3.0 x 10-8, which is the stronger acid?(b) Which is the stronger base, the acetate ion or the hypochloriteion? (c) Calculate Kb values for CH3COO- and ClO-.
- 6. For the ionization of phenylacetic acid, C6H5CH₂CO₂H + H₂O = H3O+ + C6H5CH₂CO₂ K₂ = 49 × 10-5 (a) What is [C6H5CH₂CO₂] in 0.186 M C6H3CH₂CO₂H? (b) What is the pH of 0.121 M C6H3CH₂CO₂H?Benzoic acid, C6H5COOH (pKa = 4.19), is only slightly soluble in water, but its sodium salt, C6H5COO Na", is quite soluble in water. In which of the following solutions will benzoic acid dissolve more readily than in pure water? O NAHCO; O LIOH O H;SO4 O HCI OK½CO3Calculate the pH at 25 °C of a 0.13M solution of trimethylammonium chloride ((CH;) NHCI 3 CH;),NHC!) Note that trimethylamine ((CH3),N) i is a weak base with a pK, of 4.19. b. Round your answer to 1 decimal place.
- least acidic I < || < III most acidic least acidic II < I < III most acidic least acidic III < || < I most acidic least acidic III < | < || most acidic9-20. At 25°C, what are the molar H;O' and OH concentrations in (b) 0.0600 M HN,? (d) 0.200 M trimethylamine? (f) 0.0860 M CH,CH,COONA?What is the conjugate acid of each of the following? What is the conjugate Dase of eacn? (a) NH Parts of the formula in your answer are transposed. Your answer appears to be missing a charge. Conjugate acid (b ) (CH₂)₂NH \table[[chemPad, (9) Help], [xlx =larr|l, Greek -],[(CH),NH,N What is the conjugate acid of each of the following? What is the conjugate base or eacn (UTIL SOLES- (a) NH3 Conjugate acid Conjugate base (b) (CH3)2NH Conjugate acid Conjugate base chemPad XX→→ chemPad XX→ NH₂ NH 2 NH4 NH 4 Parts of the formula in your answer are transposed. Your answer appears to be missing a charge. chemPad XX→ (CH4)2NH2 (CH_4)_2NH_2 chemPad XX→= Greek (CH₂)2N (CH_2) 2N Help Greek Help Greek X Help Greek juur Help
- HO. COOH 7. (7a) + 2 NaOH _(7b) + NazCOa. +. H2OIn the following reaction in aqueous solution, the acid reactant is and its conjugate base is CH;COOH(aq) + H2O * CH3CO0 (aq) + H30 (aq) A CH3COOH; CH3C00 B CH3COOH; NH4 NH3; CH3CO0 D) NH3; NH4" E CH3COOH; H30*5. Which one of the following equations would make more products upon addition of acid (H)? Briefly explain. H,SO,(aq) 2 HSO, (aq) + H (aq) HCl(aq) 2H(aq) + Cl'(aq) NH, (aq) + OH(aq) 2 NH;(aq) +H,O(1) 2 Fe,0;(s) 2 2 FeO(s) + O>(g) H(aq) + NH;(1)2 NH, (aq)