01:160:162 Lecture Notes - Lecture 15: Acid Rain, Lewis Acids And Bases, Equilibrium Constant

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2 Nov 2016

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Solid have constant composition, and are not part of. Removing an ion from the right side will shift the reaction to the right, making the solid the k expression. more soluble. Adding h+ ions will attract oh- to form water. Adding: fe(oh)3 + 3h+ 3h2o + fe3+ Most hydroxides are insoluble in water, but their solubility greatly increases in acid solution. The h+ ions attract the oh- away from the metal ion, and the hydroxide dissolves. What can be done to make this compound more soluble in water (shift the equilibrium. Hco3 to form h2co3 which breaks down to h2o + co2. It is the conjugate base of the weak acid, 2h+(aq) + co3 (aq) (aq) co2 + h2o. Adding: caco3(s) + 2h+ ca2++ co2 + h2o. Most carbonates are insoluble in water, but their solubility greatly increases in acid solution. 2- away from the metal ion, and carbon dioxide is.

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tration of Cl . The half-life of Tc, a radioisotope commoealy used in the reaction rate? nuclear medicine, is about 6 hours. How much of a crease the rate by a factor of eight ave the rate unchanged uble the rate Ive the rate 5.0 pg sample remains after 2 days? (A) 002g(B) 06pg (C) 08HB (D) 3 ug Which compound has the highest molar solubility in a 50. of consumption of C,H, is 0.45 M-s. What is of production of H:O 2NH3 + 302 â 2CH2CHCN + 61120 neutral solution? (A) Ag, K,"85s 10-17 (B) Baco K 2.6 10 (C) Fe(OH. K-2.810 (D) Zus, K.-3x1023 (B) 0.45 Ms (D) 2.70 Ms 5 M-s 51. Which will change the value of K, for silver szide, Ag,? (A) Adding water to the solution (B) Adding silver ions to the solution. (C) Removing azide ions from the solution. (D) Increasing the temperature of the solution. nergy diagram best matches an exothermic with this mechanism? E+S ES (Fast) ES E+P (Slow) 52. If solid Na PO4 is added to a saturated aqueous solution of Ca(POs): what will happen to the concentration of Ca" in solution? (A) It will decrease. (B) It will increase. (C) It will be unchanged. (D) It will become equal to the PO Reaction Progress â Reaction progress â concentration. A solution contains 0.002 M Pb and 0.002 M Ag'. What happens PbCI when NaCKs) is added to bring AgCI 53. 1.2x10 1.810 the chloride ion concentration to 0.01 M? â (A) Neither Pbc, nor AgCI precipitate. (B) Both PtCl, and AgCl precipitate. (C) PbCl, selectively precipitates. Reaction Progress . Reaction Progress â Y) ows (D) AgCI selectively precipitates. 54. For Agl, the Kp value is 8.5x10'1" and for [Ag CN)l the two ies. ed Ke value is 1.0x10. Which statement is true? (A) Agl is completely insoluble in a solution that contains CN contains CN contains CN time (min) (B) Agl is less soluble in water than in a solution that (C) Agl is more soluble in water than in a solution that (D) Agl is equally soluble in water and in a solution that nstant is consistent with the data? Equilibrium Constant contains CN Page et on the internet.

an observed rate las is: rale-kNo1cL1, doubling the concentration of NO and halving the concentration of Cl will have what effect on the reaction rate? ,5 49. The half-life or%Te aradi isotope commonly used in (A) increase the rate by a factor of eight (B) leave the rate unchanged (C) double the rate nuclear medicine, is abot 6 hours. How much of . 5.0 ug sample remains afher 2 days? (A) 002g ()06 (C og (D) 3W Which compound has the highest molar solubility in a 50. (D) halve the rate neutral solution? 46. The rate of consumption of CHe is 045 Ms' Whatis production of H0 . (B) BaCO, K-26 10 (C) Fe(OHh. K-2.810 the rate of (A) 0.15 Ms (C) 1.35 M-s Which energy diagram best matches an exothermic (B) 0.45 M-s (D) 2.70 Ms 51. Which will change the value of Kg for silver sride, AgN,? (A) Adding water to the solution (B) Adding silver ions to the solution. (C) Removing azide ions from the solution (D) 47. reaction with this mechanism? E+S ES (Fast) ES E+P Slow) Increasing the temperature of the solution 52. If solid NayPOs is added to a saturated aqueous solution of CalPO h what will happen to the concentration of in solution? (A) It will decrease. (B) It will increase (C) It will be unchanged (D) It will become equal to the PO," concentration Reaction Progress â 53. A solution contains 0.002 M Pb and 0,002 M Ag'. What happens when NaCl(s) is added to bring PoC 1.2-10 LAC1-1.8x10" the chloride ion concentration to 0.01 M? (A) Neither PbCl, nor AgCl precipitate B) Both PbCl, and AgCl precipitate. (C) PbCl, selectively precipitates. (D) AgCI selectively precipitates. Reaction Progress â Reaction Progress â 48. The graph shows E the change in concentration with time for two chemical species. Which balanced equation and value of the For Agl, the Ko value is 8.5x101" and for [Ag(C (A) Agl is completely insoluble in a solution th (B) Agl is less soluble in water than in a solu (C) Agl is more soluble in water than in a (D) Agl is equally soluble in water and i x) 54. Kr value is 1.0x10h. Which statement is true? 0 2468 0 time (min) contains CN equilibrium constant is consistent with the data? Equation Equilibrium Constant K,= 16 (B) X-2Y contains CN t on the internet

Why do ionic compounds dissolve well in water? Select all that are true.

Question 5 options:

Because water and ionic compounds are both polar

Water molecules have partial charges that attract the ions in the solid compound, causing it to dissociate into separated ions

Because organic compounds are nonpolar

Water molecules can surround an ion, and neutralize the ion's charge using either it's partial positive or negative side.

The individual ions are solvated by water molecules which stabilizes the ions

2. Which compound is soluble in ether but not soluble in aqueous sodium hydroxide?

Question 2 options:

	ArOH
	Ar
	ArCOOH

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When you have a two-layer mixture of water and tert-butyl methyl ether, what physical property of these liquids assures you that the ether is the top layer?

Question 4 options:

low density was my answer was

You perform each extraction twice, first with 1 mL and second with 0.15 mL. Why is the second extraction necessary?

Question 8 options:

	several small extractions is better than one large one
	to remove any orgnaic material contaninating tube 2
	to remove any remaining neutral compound

7. Which of the following reactions is not favorable?

Question 7 options:

	ArCOOH + NaOH â ArCOO^-Na⁺ + H₂O
	ArOH + NaHCO₃ â ArO^-Na⁺ + CO₂ + H₂O
	ArCOOH + NaHCO₃ â ArCOO^-Na⁺ + CO₂ + H₂O

9.Why is phenol more acidic than an aliphatic alcohol?

Question 9 options:

	Its conjugates baseâs negative charge is localized on the oxygen
	Phenols have a stronger O-H bond
	Only the phenol can form hydrogen bonds
	Its conjugated base is stabilized by resonance

Which aqueous base reacts with a carboxylic acid but not with phenol? Why?

Question 10 options:

	Sodium bicarbonate, it is a weaker base and will only react with strong acids
	Sodium hydroxide, it is a strong base and will only react with strong acids
	Sodium bicarbonate, it is a weak base and will only react with weak acids
	Sodium hydroxide, it is a strong base and will only react with weak acids

01:160:162 Lecture Notes - Lecture 15: Acid Rain, Lewis Acids And Bases, Equilibrium Constant

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