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1) Which one is easier to oxidized than iron (Fe) at 25°C? A. Au (s) B....

1) Which one is easier to oxidized than iron (Fe) at 25°C?

A. Au (s) B. Cu (s) C. Ni (s) D. Na (s) E. Pb (s)

2) What is the Ksp of an aqueous saturated Ba(OH)2 solution if the pH is 13.3 at 25°C?

A. 4 × 10−2 M

B. 2 × 10−4 M

C. 6 × 10−11 M

D. 3 × 10−11 M

E. 5 × 10−3 M

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