The dark tarnish that forms on silver ag is silver sulfide a - GED Practice Questions
Question
The dark tarnish that forms on silver (Ag) is silver sulfide (Ag2S). Tarnish can be removed by creating a reaction with aluminum (Al). The reaction forms silver and aluminum sulfide (Al2S3). The chemical equation for the reaction is shown.
Ag2S + Al→ Ag + Al2S3
This equation needs to be balanced by adding coefficients in front of the chemical formulas. A balanced equation shows that the number of atoms of each element stays the same during the reaction. A partially balanced equation is shown.
3Ag2S + 2Al →?Ag+Al2S3
Which coefficient should be added in front of Ag to balance the equation?
Answers
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Explanation
To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides:
Silver (Ag) atoms:
On the left side: 3 Ag2S contains 6 Ag atoms.
On the right side: We need to add a coefficient of 6 in front of Ag to balance the Ag atoms.
Therefore, the balanced equation is:
[3Ag2S + 2Al → 6Ag + Al2S3]
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