+ 2+ in Visual C#

Recognize DataMatrix in Visual C# + 2+

7 Which of the following is the correct net ionic equation for the reaction of acetic acid with potassium hydroxide

(A) HC2H3O2 + OH C2H3O2 + H2O + + (B) HC2H3O2 + K KC2H3O2 + H (C) HC2H3O2 + KOH KC2H3O2 + H2O + (D) H + OH H2O (E) C2H3O2 + KOH KC2H3O2 + OH

8 Which of the following is the correct net ionic equation for the addition of aqueous ammonia to a precipitate of silver chloride (A) AgCl + 4 NH3 [Ag(NH3)4] + Cl 3+ (B) AgCl + 2 NH4+ [Ag(NH4)2] + Cl + + (C) AgCl + NH4 Ag + NH4Cl + (D) AgCl + NH3 Ag + NH3Cl + (E) AgCl + 2 NH3 [Ag(NH3)2] + Cl 9 Potassium metal will react with water to release a gas and a potassium compound Which of the following is a false statement (A) The solution is acidic (B) The gas is hydrogen (C) The potassium compound is water-soluble (D) The potassium compound will react with hydrochloric acid (E) A solution of the potassium compound will form a precipitate when added to an FeCl2 solution 10 A sample is tested for the presence of the Hg2 ion This ion, along with others, may be precipitated with chloride ion If Hg22+ is present in the chloride precipitate, a black color will form upon treatment with aqueous ammonia The balanced net ionic equation for the formation of this black color is: (A) Hg2Cl2 + 2 NH3 + 2 H2O 2 Hg + 2 NH4+ + 2 Cl + 2 OH (B) Hg2Cl2 + 2 NH3 2 Hg + 2 NH3Cl (C) Hg2Cl2 + 2 NH4+ 2 Hg + 2 NH4Cl (D) Hg2Cl2 + NH4+ 2 Hg + NH4Cl + Cl (E) Hg2Cl2 + 2 NH3 Hg + HgNH2Cl + NH4+ + Cl

11 Which of the following solids is not soluble in water, but is soluble in dilute nitric acid (HNO3) (A) NaOH (B) BaCO3 (C) AgCl (D) (NH4)3PO4 (E) FeCl2 12 What is the minimum number of moles of Pb(NO3)2 must be added to 010 L of a solution that is 10 M in MgCl2 and 10 M in KCl The compound PbCl2 precipitates (A) 10 moles (B) 020 moles (C) 050 moles (D) 015 moles (E) 030 moles 13 When 500 mL of 10 M AgNO3 is added to 500 mL of 050 M HCl a precipitate of AgCl forms After the reaction is complete, what is the concentration of silver ions in the solution (A) 050 M (B) 00 M (C) 10 M (D) 025 M (E) 075 M 14 A student mixes 500 mL of 010 M Pb(NO3)2 solution with 500 mL of 010 M KCl A white precipitate forms, and the concentration of the chloride ion becomes very small Which of the following correctly places the concentrations of the remaining ions in order of decreasing concentration

2+ + (A) [NO3 ] > [Pb ] > [K ] + 2+ (B) [NO3 ] > [K ] > [Pb ] + 2+ (C) [K ] > [NO3 ] > [Pb ] 2+ + (D) [Pb ] > [NO3 ] > [K ] 2+ + (E) [Pb ] > [K ] > [NO3 ]

16 Chlorine gas is bubbled through a colorless solution and the solution turns reddish Adding a little methylene chloride to the solution extracts the color into the methylene chloride layer Which of the following ions may be present in the original solution (A) Cl (B) I (C) SO42 (D) Na+ (E) Br 17 The addition of concentrated NaOH(aq) to a 10 M (NH4)2SO4 solution will result in which of the following observations (A) The solution becomes neutral (B) The formation of a brown precipitate takes place (C) Nothing happens because the two solutions are immiscible (D) The odor of ammonia will be detected (E) An odorless gas forms and bubbles out of the mixture 18 Which of the following solutions will give a yellow precipitate when a 01 M Na2CrO4 solution is added to a 01 M solution of the ion listed

+ (A) K (aq) 2+ (B) Pb (aq) (C) NO3 (aq) (D) OH (aq) + (E) NH4 (aq)

15 A solution is prepared for qualitative analysis 2+ The solution contains the following ions: Co , 2+ 3+ Pb , and Al Which of the following will cause no observable reaction (A) Dilute NH3(aq) is added (B) Dilute K2CrO4(aq) is added (C) Dilute HNO3(aq) is added (D) Dilute K2S(aq) is added (E) Dilute HCl(aq) is added