A 1.00 liter solution contains 0.35 M ammonia and 0.45 M ammonium iodide. If 0.1

Question

A 1.00 liter solution contains 0.35 M ammonia and 0.45 M ammonium iodide. If 0.110 moles of barium hydroxide are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of barium hydroxide.)

A. The number of moles of NH3 will decrease.

B. The number of moles of NH4+ will increase.

C. The equilibrium concentration of H3O+ will remain the same.

D. The pH will increase.

E. The ratio of [NH3] / [NH4+] will increase.

Explanation / Answer

since both NH3 and Ba(OH)2 are bases, there is no reaction. The reaction between NH4I and Ba(OH)2 is not possibel. Ba(OH)2 underdoes ionization as

Ba(OH)2----> Ba+2+2OH-

so the pH increases due to the presence of OH- ions

Rest of the statements are false.

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