下列溶液中各微粒的浓度关系正确的是A.0.1mol/LNa2S溶液中:2C(Na+)=C(S2-)+C(HS-)+C(H2S)B.0.1mol/LPH=9的NaNO2溶液中C(Na+)>C(NO2-)>C(OH-)>C(H+)C.等PH的氨水、NaOH溶液、Ba(OH)2溶液中:C(NH4+)=C(Na+)=C(Ba2+)D.向NH4HCO3
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 05:06:01
![下列溶液中各微粒的浓度关系正确的是A.0.1mol/LNa2S溶液中:2C(Na+)=C(S2-)+C(HS-)+C(H2S)B.0.1mol/LPH=9的NaNO2溶液中C(Na+)>C(NO2-)>C(OH-)>C(H+)C.等PH的氨水、NaOH溶液、Ba(OH)2溶液中:C(NH4+)=C(Na+)=C(Ba2+)D.向NH4HCO3](/uploads/image/z/13054046-14-6.jpg?t=%E4%B8%8B%E5%88%97%E6%BA%B6%E6%B6%B2%E4%B8%AD%E5%90%84%E5%BE%AE%E7%B2%92%E7%9A%84%E6%B5%93%E5%BA%A6%E5%85%B3%E7%B3%BB%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AFA.0.1mol%2FLNa2S%E6%BA%B6%E6%B6%B2%E4%B8%AD%EF%BC%9A2C%28Na%2B%29%3DC%28S2-%29%2BC%28HS-%29%2BC%28H2S%29B.0.1mol%2FLPH%3D9%E7%9A%84NaNO2%E6%BA%B6%E6%B6%B2%E4%B8%ADC%28Na%2B%29%3EC%28NO2-%29%3EC%28OH-%29%3EC%28H%2B%29C.%E7%AD%89PH%E7%9A%84%E6%B0%A8%E6%B0%B4%E3%80%81NaOH%E6%BA%B6%E6%B6%B2%E3%80%81Ba%28OH%292%E6%BA%B6%E6%B6%B2%E4%B8%AD%EF%BC%9AC%28NH4%2B%29%3DC%28Na%2B%29%3DC%28Ba2%2B%29D.%E5%90%91NH4HCO3)
下列溶液中各微粒的浓度关系正确的是A.0.1mol/LNa2S溶液中:2C(Na+)=C(S2-)+C(HS-)+C(H2S)B.0.1mol/LPH=9的NaNO2溶液中C(Na+)>C(NO2-)>C(OH-)>C(H+)C.等PH的氨水、NaOH溶液、Ba(OH)2溶液中:C(NH4+)=C(Na+)=C(Ba2+)D.向NH4HCO3
下列溶液中各微粒的浓度关系正确的是
A.0.1mol/LNa2S溶液中:2C(Na+)=C(S2-)+C(HS-)+C(H2S)
B.0.1mol/LPH=9的NaNO2溶液中C(Na+)>C(NO2-)>C(OH-)>C(H+)
C.等PH的氨水、NaOH溶液、Ba(OH)2溶液中:C(NH4+)=C(Na+)=C(Ba2+)
D.向NH4HCO3溶液中滴加NaOH溶液至PH=7:C(NH4+)+C(Na+)=C(HCO32-)+C(CO32-)
选什么?其他选项错哪了?困惑,
下列溶液中各微粒的浓度关系正确的是A.0.1mol/LNa2S溶液中:2C(Na+)=C(S2-)+C(HS-)+C(H2S)B.0.1mol/LPH=9的NaNO2溶液中C(Na+)>C(NO2-)>C(OH-)>C(H+)C.等PH的氨水、NaOH溶液、Ba(OH)2溶液中:C(NH4+)=C(Na+)=C(Ba2+)D.向NH4HCO3
选B.
A.错误,Na+是S2-的2倍,所以是C(Na+)=2[C(S2-)+C(HS-)+C(H2S)]
B.正确,因为NO2-会水解导致溶液显碱性,Na+>NO2-,OH->H+
C.错误,Ba(OH)2是二元碱,1个Ba(OH)2含有2个OH-,所以应该是C(NH4+)=C(Na+)=1/2C(Ba2+)
D.错误,电荷守恒是C(NH4+)+C(Na+)+C(H+)=C(HCO32-)+2C(CO32-)+C(OH-),pH=7,c(OH-)=c(H+),可以写为C(NH4+)+C(Na+)=C(HCO32-)+2C(CO32-)