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弱电解质电离平衡

> 已知H 2S两级电离常数分别为K1=1.3×10 -7，K2=7.1×10 -15；CH 3COOH的电离常数K=1. 75×10 -5，试根据上述数据，判断下列化学反应方程式正确的是 [ ] A. Na 2S+2CH 3COOH(足量)=2CH 3COONa+H 2S↑ B. Na 2S+2CH 3COOH(少量)=2CH 3COONa+H 2S↑ C. Na 2S（少量）+CH 3COOH=CH 3COONa+NaHS D. CH 3COOH+NaHS=CH 3COONa+H 2S↑

问题：

发布时间：2024-09-07

已知H ₂S两级电离常数分别为K1=1.3×10 ^-7，K2=7.1×10 ^-15；CH ₃COOH的电离常数K=1. 75×10 ^-5，试根据上述数据，判断下列化学反应方程式正确的是
[ ]
A. Na ₂S+2CH ₃COOH(足量)=2CH ₃COONa+H ₂S↑
B. Na ₂S+2CH ₃COOH(少量)=2CH ₃COONa+H ₂S↑
C. Na ₂S（少量）+CH ₃COOH=CH ₃COONa+NaHS
D. CH ₃COOH+NaHS=CH ₃COONa+H ₂S↑

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