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18 Nov 2019
Trichloroacetic acid. HC_2CI_3O_2. has a pKa of 0.70. Suppose you have 100.0 mL of a solution containing 0.200 M HC_2CI_3O_2 and 0.200 M NaC_2Cl_3O_2. What would the pH of the solution be? 0.20 0.040 0.78 1.08 It cannot be determined with the given information Which of the following solutions contains the strongest acid? 0.60 M NaHSO_4, K_a = 1.20 times 10^-2 0.30 M H_3PO_4, K_a = 7.42 times 10^-3 0.45 M H_2SO_3, K_a = 1.54 times 10^-2 0.20 M HCN, K_a = 4.93 times 10^-10 1.00 M H_2CO_3, K_a = 4.3 times 10^-7 Which of the following acids would be the best choice to combine with its sodium salt to make a buffered solution at pOH 11.0 Oxalic (pK_a = 1.23) Malonic (pK_a = 2.83) Hydrogen sulfide (pK_a = 7.04) Hydrocyanic (pK_a = 9.31) Hydrogen peroxide (pK_a = 11.62) Place the following in the order of increasing acid strength (weakest to strongest) HCI HI HBr HAt IV, II, III, I IV, II, I, III Ill, I, II, IV I, III, II, IV None of the above The autoionization of water is endothermic and has a value of 1.0 times 10^-14 at 25degree C. Which of the following is accurate for K_w at 15degree C? K_w will be higher; pH will be less than 7 K_w will be higher; pH will be greater than 7 K_w will be lower; pH will be less than 7 K_w will be lower; pH will be greater than 7 None of the above
Trichloroacetic acid. HC_2CI_3O_2. has a pKa of 0.70. Suppose you have 100.0 mL of a solution containing 0.200 M HC_2CI_3O_2 and 0.200 M NaC_2Cl_3O_2. What would the pH of the solution be? 0.20 0.040 0.78 1.08 It cannot be determined with the given information Which of the following solutions contains the strongest acid? 0.60 M NaHSO_4, K_a = 1.20 times 10^-2 0.30 M H_3PO_4, K_a = 7.42 times 10^-3 0.45 M H_2SO_3, K_a = 1.54 times 10^-2 0.20 M HCN, K_a = 4.93 times 10^-10 1.00 M H_2CO_3, K_a = 4.3 times 10^-7 Which of the following acids would be the best choice to combine with its sodium salt to make a buffered solution at pOH 11.0 Oxalic (pK_a = 1.23) Malonic (pK_a = 2.83) Hydrogen sulfide (pK_a = 7.04) Hydrocyanic (pK_a = 9.31) Hydrogen peroxide (pK_a = 11.62) Place the following in the order of increasing acid strength (weakest to strongest) HCI HI HBr HAt IV, II, III, I IV, II, I, III Ill, I, II, IV I, III, II, IV None of the above The autoionization of water is endothermic and has a value of 1.0 times 10^-14 at 25degree C. Which of the following is accurate for K_w at 15degree C? K_w will be higher; pH will be less than 7 K_w will be higher; pH will be greater than 7 K_w will be lower; pH will be less than 7 K_w will be lower; pH will be greater than 7 None of the above
Keith LeannonLv2
6 Jul 2019