2022高一外研英语周报32答案

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11.(20分)(1)④⑥⑧(3分)③⑨(3分)CH3 COOH FCH2COO+H+(2分)(2)I(3分)(3)c>a=b(3分)c>a>b(3分)(4)2(3分)【解析】(1)Cu是单质,既不是电解质也不是非电解质;液态SO2属于非电解质;CH3COOH属于弱电解质; Nahco3属于强电解质;Ba(OH)2溶液属于混合物,既不是电解质也不是非电解质;熔融NaCl属于强电解质;稀氨水属于混合物;既不是电解质也不是非电解质;BaSO4属于强电解质;H2O属于弱电解质。CH3COOH的电离方程式为CH3COOHCH3COO+H+。(2)酸性:HCl> CH, COOH,加水稀释,盐酸的pH的变化较大,故符合盐酸p变化的曲线是I(3)CH2COOH是弱酸HCl、H12SO是强酸应程中CH3COOH不断电离产生H,相同状况下生气体的体积由大到小的顺序为c>a=b;当它们的物质的量浓度相同时,硫酸中c(H+)最大,醋酸中c(H+)最小,故溶液pH:c>a>b(4)由题意可知0.1mol·L-1×v-c(HC)×9VV+9v=10-3mol·L-1,解得c(HCl)=0.01mol·L-,盐酸溶液的pH=2。

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