FIRST STATEMENT SECOND STATEMENT An aqueous solution of hydrochloric acid shows a negative deviation from Raoult's 45. When concentrated HCl is mixed with water, heat is evolved An aqueous solution of sodium ethanoate is alkaline having a pH value greater than 7 46. Sodium ethanoate is the salt of a weak base and strong acid. 47. Zinc oxide is amphoteric. When heated zinc oxide turns from a white solid to a yellow solid. 48. Carbon tetrachloride reacts with water. Carbon lacks available low lying d-orbitals. erevis When ammonium nitrate is dissolved in water, the temperature of the solution drops. 49. The lattice energy of ammonium nitrate is greater than the total solvation energy of its ions 50. Ethyne gives a white precipitate wvhen reacted with ammoniacal silver nitrate. Ethyne is converted to benzene when strongly heated.

FIRST STATEMENT SECOND STATEMENT An aqueous solution of hydrochloric acid shows a negative deviation from Raoult's 45. When concentrated HCl is mixed with water, heat is evolved An aqueous solution of sodium ethanoate is alkaline having a pH value greater than 7 46. Sodium ethanoate is the salt of a weak base and strong acid. 47. Zinc oxide is amphoteric. When heated zinc oxide turns from a white solid to a yellow solid. 48. Carbon tetrachloride reacts with water. Carbon lacks available low lying d-orbitals. erevis When ammonium nitrate is dissolved in water, the temperature of the solution drops. 49. The lattice energy of ammonium nitrate is greater than the total solvation energy of its ions 50. Ethyne gives a white precipitate wvhen reacted with ammoniacal silver nitrate. Ethyne is converted to benzene when strongly heated.

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 77QAP: Two students were asked to determine the Kb of an unknown base. They were given a bottle with a...

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Two students were asked to determine the Kb of an unknown base. They were given a bottle with a solution in it. The bottle was labeled aqueous solution of a monoprotic strong acid. They were also given a pH meter, a buret, and an appropriate indicator. They reported the following data: volume of acid required for neutralization = 21.0 mL pH after 7.00 mL of strong acid added = 8.95 Use the students' data to determme the Kb of the unknown base.
For oxyacids, how does acid strength depend on a. the strength of the bond to the acidic hydrogen atom? b. the electronegativity of the element bonded to the oxygen atom that bears the acidic hydrogen? c. the number of oxygen atoms? How does the strength of a conjugate base depend on these factors? What type of solution forms when a nonmetal oxide dissolves in water? Give an example of such an oxide. What type of solution forms when a metal oxide dissolves in water? Give an example of such an oxide.
Sodium cyanide is the salt of the weak acid HCN. Calculate the concentrations of H3O+,OH,HCN and Na+ in a solution prepared by dissolving 10.8g of NaCN in enough water to make 5.00102mLof solution at 25 C.
State which of the following species are amphiprotic and write chemical equations illustrating the amphiprotic character of these species. (a) NH3. (b) HPO4-. (c) Br-. (d) NH4+. (e) ASO43-
Phthalic acid ( H2C8H4O4, abbreviated H2Ph ) is a diproticacid. Its ionization in water at 25°C takes place in twosteps: H2Ph(aq)+H2O(l)H3O+(aq)+HPh(aq)Ka1=1.26103H2Ph-(aq)+H2O(l)H3O+(aq)+Ph2(aq)Ka2=3.10106 If 0.0100 mol of phthalic acid is dissolved per liter ofwater, calculate the equilibriumconcentrations of H2Ph,HPh,Ph2, and H3O+.
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Consider a solution of an unknown salt having the general formula BHCl, where B is one of the weak bases in Table 13-3. A 0.10-M solution of the unknown salt has a pH of 5.82. What is the actual formula of the salt?