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- Construct the expression for Ka for the weak acid, HC₉H₇O₄.A solution is prepared at 25 °C that is initially 0.18 M in trimethylamine ((CH,)N), a weak base with K = 7.4 × 10 ((CH;),NHB" ', and 0.14 M in trimethylammonium bromide Calculate the pH of the solution. Round your answer to 2 decimal places. нв:). pH =A solution is prepared at 25 °C that is initially 0.057M in dimethylamine ((CH3), NH), : a weak base with K,=5.4 × 10 and 0.29M in dimethylammonium bromide ((CH,), NH,Br). Calculate the pH of the solution. Round your answer to 2 decimal places. 2 pH = |||
- A solution is prepared at 25 °C that Is initlally 0.43M in dimethylamine ((CH, NH, a weak base with K, =5.4x10, and 0.15M in dimethylammonlum -4 and 0.15M In dimethylammonium bromide ((CH,),NH,Br) ((CH,) NH,Br). Calculate the pH of the solution. Round your answer to 2 decimal places. bгomide 2. pH Explanation Check 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privac hpIn the laboratory, a general chemistry student measured the pH of a 0.444 M aqueous solution of pyridine, C5H5N to be 9.396. Use the information she obtained to determine the K, for this base. Kb (experiment) =The pH of a solution containing 0.010 M lactic acid and 0.087 M lactate is 4.80. Calculate thepKa of the lactic acid.
- An organic acid (HA) has a molecular weight of 100. g mol-1, a Kow = 5.6 and a K, = 2.7 x 10-2. If originally 2.0 g of the acid is dissolved in 100 mL of octanol (there is no dissociation in octanol), which is then placed in contact with 100 mL of water, what will be the pH of the water? (Consider the equilibrium processes to be sequential and unrelated chemically) O 1.89 1.48 O 2.01 1.74 O 1.61A solution is prepared at 25 °C that is initially 0.34M in trimethylamine ((CH,),N), a weak base with K,=7.4 × 10 ", and 0.057M in trimethylammonium bromide ((CH, NHB1). Calculate the pH of the solution. Round your answer to 2 decimal places. pH = UCH3CH2CO2H , Ką = 1.3 x 105 CH3CH2CO2 , Kp = 7.7 x 10-10 F, Kp = 1.4 x 10-11 HF , Ką = 7.2 x 10-4 For the reaction between propanoic acid (CH3CH2CO2H) and a solution containing fluoride ions (F"): (a) The name of the conjugate base produced is (b) The name of the conjugate acid produced is (c) The reaction is favoured (write 'reactant' or 'product'), because the reactants are the (write 'weaker' or 'stronger') set of acid and base.
- What mass (in g) of potassium fluoride should be added to 0.50 Lof 0.255-M HF(aq) at 25 °C to give a solution with a pH of 3.85 given that the Ką of HF is 7.1x10-4? Molar mass of KF = 58.1 g/mol. Express your answer in decimal notation rounded to three significant figures.NH3 is a weak base (Kp 1.8 x 10-) and so the salt NH4C1 acts as a weak acid. What is the pH of a solution that is 0.030 M in NH4C1 at 25 °C? pH =In the laboratory, a general chemistry student measured the pH of a 0.483 M aqueous solution of triethylamine, (C2H5)3N to be 12.129. Use the information she obtained to determine the K, for this base. Kb(experiment) : %3D