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NH3(g) + H2O(l) NH4 + (aq) + OH - (aq)<br />
a. The double arrows indicate that ammonia, NH3, is only very slightly soluble in water.<br />
b. The reaction is reversible.<br />
c. When NH3 is added to H2O, NH4 + and OH - ions are produced in a 1:1 ratio.<br />
d. When solutions of NH4Cl and NaOH are mixed, some ammonia is produced.<br />
e. Ammonia is considered a weak base.<br />
____ 84. Which one of the following salts is insoluble in water?<br />
a. NaF<br />
b. NH4ClO3<br />
c. CuCl2<br />
d. CaSO4<br />
e. Ba3(AsO4)2<br />
____ 85. Which response includes only soluble salts and no others?<br />
I. BaCl2<br />
II. PbSO4<br />
III. Fe2S3<br />
IV. Ca3(PO4)2<br />
V. Sn(NO3)4<br />
a. II, III, IV<br />
b. I, IV, V<br />
c. I, V<br />
d. I, III<br />
e. II, IV, V<br />
____ 86. Which one of the following salts is insoluble in water?<br />
a. FeCl2<br />
b. KCH3COO<br />
c. Pb(NO3)2<br />
d. PbS<br />
e. NH4Cl<br />
____ 87. Which one of the following is a weak electrolyte?<br />
a. H2CO3<br />
b. HCl<br />
c. NaCl<br />
d. (NH4)2S<br />
e. LiOH<br />
____ 88. Which response includes all of the following substances that are strong electrolytes, and no others?<br />
I. LiOH<br />
II. Ca(CH3COO)2<br />
III. HClO4<br />
IV. H3PO4<br />
a. I<br />
b. II and III
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