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Balance the redox equation below and identify the coefficients X, Y and Z in order: XNa2HAsO3 + YNaBrO3 + ZHCl → NaBr + H3AsO4 + NaCl

1. 2, 1, 2
2. 2, 1, 3
3. 3, 1, 6
4. 3, 1, 4

Correct answer: 2, 1, 2

Solution

The coefficients X, Y, and Z are determined by balancing the number of atoms and charges on both sides of the equation. In this case, using 2 for Na2HAsO3, 1 for NaBrO3, and 2 for HCl ensures that all elements are balanced, confirming that the reaction conserves mass and charge.

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