Redox equations are often long and difficult to balance by inspection. Luckily,

Question

Redox equations are often long and difficult to balance by inspection. Luckily, electron transfers and oxidation numbers provide hints for balancing such equations. Balance the following equation: K2CrO4 + Na2SO3+HCI rightarrow KCl + Na2SO4 + CrCls + H20 Enter the coefficients for each compound, separated by commas, in the order in which they appear in the equation (e.g., 1,2,3, 4,5,6,7) In the process of oxidizing I- to I2, SO42-is reduced to SO2- How many moles of SO2 are produced in the formation of one mole of I2? Express your answer numerically in moles. Given the equation how many H+'s should be added to the left side to balance the hydrogen atoms?

Explanation / Answer

2(NO3)- + 3(S)2- + 8H+ ---> 2NO + 3S + 4H2O thus 8 H+ should be added to LHS to balance eq

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