City University of New York 27)Which of the following reactions will result in w
ID: 1025438 • Letter: C
Question
City University of New York 27)Which of the following reactions will result in with pH>7 a. HCIo2(aq) with NaOH(aq) b. HCIOs(aq) with NaOH(aq) c. LiOH(aq) with HCIO (aq) d. NHs(aq) with HCIos(aq) e. Both c and d a titration curve that has an equivalence point For questions 28-29 consider the following reaction 2NOz(brown gas) = N204(colorlessgas), K#3.1 at 400 K 28)what can you say about the NO2(g) and Nzodg) mixture in the rigid isu - container at 400 K represented by the picture to the right? a. For this mixture, Q Kand the reaction will move to the left. o O 0 1mol No, o-1 mol N,0 29) Now consider a sealed rigid glass flask containing an equilibrium mixture of NO(g) and N204(g) at room temperature. The mixture appears dark brown. When you submerge the flask with the gases in boiling water the color of the mixture becomes lighter. What is the possible explanation for this phenomenon? a. The reaction is exothermic, so when you increase the temperature the equilibrium b. The pressure of gases in the rigid container will be greater at higher temperature and the c. The pressure of gases in the rigid container will be greater at higher temperature and the d. The reaction is exothermic so when you increase the temperature the equilibrium e. Both a and d are true. position shifts to the left. equilibrium position will shift to the right. equilibrium position will shift to the left. position shifts to the right. Chatelier's principle, this hydroxide will be more soluble in an aqueous solution of than in pure water at the same temperature. 30)Mg(OH)2 has a very low solubility in pure water at room temperature. According to Le a. MgCl2 b. HCI c. NH 0H d. NH4CI e. NaOHExplanation / Answer
Answer for 27
Equivalence point comes greater than 7 in case of weak acid and strong base.
thus in option (a), its a good combination of weak acid like HClO2 and strong base like NaOH. In all other cases, this combination is not fit good.