Problem: Consider the following three statements about the reactivity of an alkali metal M with oxygen gas:Based on their positions in the periodic table, the expected product is the ionic oxide M2O.Some of the alkali metals produce metal peroxides or metal superoxides when they react with oxygen.When dissolved in water, an alkali metal oxide produces a basic solution.Which of the statements I, II, and III is or are true?

FREE Expert Solution

Alkali metals are metals found in group 1A of the periodic table.

These are Li, Na, K, Rb, Cs, and Fr

Alkali metals tend to lose 1 electron in order to achieve the same stable valence as noble gases.

Example:

Na → Na+ + 1e-



In a reaction with oxygen gas O2, alkali metals can from ionic oxides (O2-)

Example: 4K(s) + O2(g) → 2K2O(s)


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Problem Details

Consider the following three statements about the reactivity of an alkali metal M with oxygen gas:

  1. Based on their positions in the periodic table, the expected product is the ionic oxide M2O.
  2. Some of the alkali metals produce metal peroxides or metal superoxides when they react with oxygen.
  3. When dissolved in water, an alkali metal oxide produces a basic solution.

Which of the statements I, II, and III is or are true?


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