The Correct option at the Transition point for all indicators is :
31 (1 Point) Which of the following applies at the transition point for all indicators? a)...
5 (1 Point) Consider the following equilibrium for an indicator: Hind + H2OH,0* + Indº Which two species must be of two different colours in order to be used as an indicator? A. Hind and H2O B. Hind and Ind C. H,O* and Ind D. Hind and H,0* E. H2O and Ind ОА НОВ с Ο Ε
12 (1 Point) Consider the following equilibrium for an acid-base indicator: Hind H+ + Ind K = 1.0 x 10-10 Which of the following statements is correct at pH 7.0 ? A. [Ind"] <[HInd] B. [Ind'] = [HInd] C. [Ind] > [HInd] D. [Ind] = [HInd] = [HT] E. KA = [H*] A B Ос OD E
30 (1 Point) Which of the following indicators is yellow at a pH of 10.0? A. bromcresol green B. phenol red C. thymol blue D. methyl violet E. alizarin yellow СА B С D О Е
16. Which of the following is not a method for preparing butanoic acid? A. CH3CH2CH2Br NaCN; then H3O*, reflux B. CH3CH2CH2MgBr +CO2; then H30 C. CH3CH2CH2OH CO D. CH3CH2CH2CO2Et OH-/H2O; then H0* E. CH3CH2CH2CH2OH KMnO4/OH-/H2O/heat; then H3O 17. Which of these combinations will not produce benzoic acid? A. CeH5CH2OH + KMnO4/OH-/H2O, heat; then H3O* В. СоН:СH, C. CH6+CO2, high pressure D. CHsCOCH3 +Cl2/OH-/H2O; then H3O* E. CHSCOCI+OH-/H2O ; then H3O* KMnO4/OH-/H2O, heat; then H30* 18. What would be the best...
Which of the following statements describes a basic solution? 1. [H30+]> [OH] 2. [H30]<[OH] 3. [H30'] x [OH] #1 x 10-14 4. [H3O+]/[OH] = 1 x 10-14 5. [H3O+]/[OH]=1 If the pH of a solution is 10, what is the hydronium, H ion concentration? 1. A) 1 x 10-10 M 2. B) 1 x 1010 M 3. C) 10 M 4. D) 10 M 5.E) * 1 1010 M As the pH increases the hydroxide ion concentration 1. A) goes...
what are the hest methods to produce the desired compounds? 86. Which of the following is the best method for preparing lactic acid from acetaldehyde? OH CH3CHCOOH CH3CH lactic acid acetaldehyde A) C12: -OH; CH3OH B) CH3MgBr; -OH D) HC "N; H30+/heat E) C12, Mg/ether; -OH 87. Which of the sequences works best to accomplish the following conversion? C) KMnO4:-OH Section: 16-4 CHO A) 1. NaCN, HCI 2. H2, Pt D) 1. H2NNH2, H+2. H3O+ B) 1. H2NCH2MgBr 2. H30+...
Q 21: Which of the following is the strongest acid? A) HF (K, for HF is 7.2 x 10-4) B) HCN (K for HCN is 4.9 x 10-10) C) HCNO (K for HCNO is 2 x 10-4) D) H3B03 (K, for H3B03 is 5.4 x 10-10) OA B с D Question 22 (2.439024 points) We were unable to transcribe this imageQuestion 23 (2.439024 points) Q 23: Which of the following is the weakest acid? A) HF (K, for HF is...
12. The pK, for NH4 is 9.26. This expression refers to which of the following reactions? A. NH4+ (aq) + OH(aq) + NH3(aq) + H2O(aq) B. NH4+ (aq) + H2O(l) NH3(aq) + H30+(aq) C. H3O+(aq) + OH(aq) → 2H2O(1) D. NH3(aq) + H30+(aq) NH4+ (aq) + H2O(l) E. NH3(aq) + H2O(1) NH4+ (aq) + OH (aq)
Question 10 1 points Save Answer Which of the following indicators is most appropriate to use in forcasting future economic activity? A. Laging economic indicators 3. Leading economie indicatos C. Coincident economic indicators D. All of the above E. None of the above
Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 200(g) = CO2(g) + C(s) A. [CO][C]/[CO] B. K [CO] C. [CO] / [CO2) D. [CO]/[CO] E. 2[CO] /[CO][C] In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Châtelier's principle? ООООО A. 2N, () + 0,02N,0 () B. N.O. (g) 2NO, (g) C. N2(g) + 3H2(g)2NH3 (9) D. N2 (9) + 202...