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1. All the following act as a Lewis acid in water except

a. SO3
b. BH3
c. Sn4+
d. Na2O *** I think c or d.

2. Which acts as a Lewis acid but neither Arrhenius nor Brønsted-Lowry?
a. Fe3+(aq)
b. NH3(aq)
c.HCOOH(aq)
d. HClO(aq)

3. An unknown solution forms a precipitate when the pH is raised but does not when sulfate is added. The cation present could be which of the following?
a. Li+
b. Ba2+
c. K+
d. Mg2+

1 answer

d
a
d
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