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已知还原性: SO32>I\mathrm{SO}_{3}^{2-}>I^{*} 。向含 a mol KI和a $\mathrm{mol} \mathrm{K}_{2} ...
Mar 19, 2024
已知还原性: \mathrm{SO}_{3}^{2-}>I^{*} 。向含 a mol KI和a molK2SO3\mathrm{mol} \mathrm{K}_{2} \mathrm{SO}_{3} 的混合液中通入 bmolCl2\mathrm{b} \mathrm{mol} \mathrm{Cl}_{2} 充分反应(不考虑 Cl2\mathrm{Cl}_{2}I2\mathrm{I}_{2} 之间的反应)。下列说法不正确的是 A. 当 a=ba=b 时,发生的离子反应为 SO32+Cl2+H2O=SO42+2H++2Cl\mathrm{SO}_{3}^{2-}+\mathrm{Cl}_{2}+\mathrm{H}_{2} \mathrm{O}=\mathrm{SO}_{4}^{2-}+2 \mathrm{H}^{+}+2 \mathrm{Cl}^{-} B. 当 5a=4 b5 \mathrm{a}=4 \mathrm{~b} 时,发生的离子反应为 4SO32+2I+5Cl2+4H2O=4SO42+I2+8H++10Cl4 \mathrm{SO}_{3}^{2-}+2 \mathrm{I}^{-}+5 \mathrm{Cl}_{2}+4 \mathrm{H}_{2} \mathrm{O}=4 \mathrm{SO}_{4}^{2-}+\mathrm{I}_{2}+8 \mathrm{H}^{+}+10 \mathrm{Cl}^{-} C. 当 ab32aa \leq b \leq \frac{3}{2} a 时,反应中转移电子的物质的量 n(e)n\left(e^{-}\right)aa mol n(e)3a\leq n\left(e^{-}\right) \leq 3 a mol D. 当 \mathrm{a}<\mathrm{b}<\frac{3}{2} \mathrm{a} 时,溶液中 SO42I\mathrm{SO}_{4}^{2-} 、 \mathrm{I}^{-}Cl\mathrm{Cl}^{-}的物质的量之比为 a:(3a2 b):2 b\mathrm{a}:(3 \mathrm{a}-2 \mathrm{~b}): 2 \mathrm{~b}
B
Key Concept
Stoichiometry of the reaction
Explanation
The stoichiometry in option B is incorrect because the ratio of reactants does not match the balanced chemical equation. The correct stoichiometry should maintain the balance between the oxidation states and the number of atoms on both sides of the reaction.
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