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General Chemistry Principles, Patterns, and Applications, 2011

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. NaH<br />

c. KBr<br />

d. C 2 H 5 NH + 3 Cl −<br />

11. When each compound is added to water, would you expect the pH of the solution to increase, decrease, or<br />

remain the same?<br />

a. LiCH 3<br />

b. MgCl 2<br />

c. K 2 O<br />

d. (CH 3 ) 2 NH + 2 Br −<br />

12. Which complex ion would you expect to be more acidic—Pb(H 2 O) 2+ 4 or Sn(H 2 O) 2+ 4 ? Why?<br />

13. Would you expect Sn(H 2 O) 2+ 4 or Sn(H 2 O) 4+ 6 to be more acidic? Why?<br />

14. Is it possible to arrange the hydrides LiH, RbH, KH, CsH, <strong>and</strong> NaH in order of increasing base strength in<br />

aqueous solution? Why or why not?<br />

A N S W E R<br />

1.<br />

a. HSO4 - ( aq) acid 1+ H 2O( l)base 2<br />

SO42 - ( aq)base 1 + H 3O + ( aq)acid 2<br />

b. C3H 7NO2( aq)base 2 + H 3O + ( aq)acid 1<br />

C3H 8NO2 + ( aq)acid 2 + H 2O( l)base 1<br />

2.<br />

a. HOAc ( aq)acid 1 + NH 3( aq)base 2 CH 3CO2 - ( aq)base 1 + NH 4 + ( aq)acid 2<br />

a. SbF5( aq)acid 1 + 2HF ( aq)base 2 H2F + ( aq)acid 2 + SbF6 -( aq)base 1<br />

N U M E R I C A L PR O BL E M S<br />

1. Arrange these acids in order of increasing strength.<br />

o acid A: pK a = 1.52<br />

o acid B: pK a = 6.93<br />

o acid C: pK a = 3.86<br />

Given solutions with the same initial concentration of each acid, which would have the highest percent<br />

ionization?<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

1465

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