The set of numerical coefficients that balances the chemical equation K2CrO4+HCl K2Cr2O7+KCl+H2O
Correct answer: C. 2, 1, 1, 2, 1
- A. 1, 1, 2, 2, 1
- B. 2, 2, 1, 1, 1
- C. 2, 1, 1, 2, 1
- D. 2, 2, 1, 2, 1
Explanation
This incorrectly doubles both K₂Cr₂O₇ and KCl, leading to an imbalance in potassium and oxygen on top of the existing hydrogen issue.
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Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
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