Multiple Choice
Based on the activity series, rank the following metals from most reactive (1) to least reactive (3): silver, strontium, technetium.
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6. Chemical Quantities & Aqueous Reactions
Activity Series
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Based on your understanding of activities determine if a reaction occurs and if so provide the products formed.
Ba (s) + H2O (g) →
A
Ba (s) + 4 H2O (g) → Ba(OH)2 (aq) + 2 H2 (g)
B
Ba (s) + H2O (g) → Ba(OH)2 (aq) + H2 (g)
C
Ba (s) + 2 H2O (g) → Ba(OH)2 (aq) + H2 (g)
D
No reaction
Verified step by step guidance1
Identify the reactants and products in the given chemical equation. The reactants are barium (Ba) in solid form and water (H2O) in gaseous form.
Consider the reactivity of barium. Barium is an alkaline earth metal and is known to react with water to form barium hydroxide (Ba(OH)2) and hydrogen gas (H2).
Write the balanced chemical equation for the reaction between barium and water. The balanced equation should reflect the stoichiometry of the reaction: Ba (s) + 2 H2O (g) → Ba(OH)2 (aq) + H2 (g).
Verify the stoichiometry of the balanced equation. Ensure that the number of atoms of each element is the same on both sides of the equation. For this reaction, there should be 1 barium atom, 2 oxygen atoms, and 4 hydrogen atoms on each side.
Conclude whether a reaction occurs based on the activity of barium. Since barium is reactive with water, the reaction does occur, and the products formed are barium hydroxide and hydrogen gas.
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