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H2C2O4Ϊ¶þÔªÈõËá¡£20¡æÅäÖÆÒ»×éc(H2C2O4)+c(HC2O4¨C)+c(C2O42¨C)=0.100 mol¡¤L¨C1µÄH2C2O4ºÍNaOH»ìºÏÈÜÒº£¬ÈÜÒºÖв¿·Ö΢Á£µÄÎïÖʵÄÁ¿Å¨¶ÈËæpHµÄ±ä»¯ÇúÏßÈçͼËùʾ¡£Ò»¶¨ÕýÈ·µÄÊÇ
A£®pH=2.5µÄÈÜÒºÖУºc(H2C2O4)+c(C2O42¨C)£¾c(HC2O4¨C)
B£®c(Na+)=0.100 mol¡¤L¨C1µÄÈÜÒºÖУºc(H+)+c(H2C2O4)=c(OH¨C)+c(C2O42¨C)
C£®c(HC2O4¨C)=c(C2O42¨C)µÄÈÜÒºÖУºc(Na+)£¾0.100 mol¡¤L¨C1+c(HC2O4¨C)
D£®pH=7µÄÈÜÒºÖУºc(Na+)<2c(C2O42¨C)
Ïò1 Lº¬0.01 mol NaAlO2ºÍ0.02 mol NaOHµÄÈÜÒºÖлºÂýͨÈëCO2£¬Ëæn(CO2)Ôö´ó£¬ÏȺó·¢ÉúÈý¸ö²»Í¬µÄ·´Ó¦£¬µ±0.01 mol<n(CO2) 0.015ʱ·¢ÉúµÄ·´Ó¦ÊÇ£º2NaAlO2+ CO2+3H2O=2Al(OH)3¡ý+Na2CO3¡£ÏÂÁжÔÓ¦¹ØϵÕýÈ·µÄÊÇ
Ñ¡Ïî | n(CO2)/mol | ÈÜÒºÖÐÀë×ÓµÄÎïÖʵÄÁ¿Å¨¶È |
A | 0 | c(Na+)>c(AlO2-)+c(OH-) |
B | 0.01 | c(Na+)>c(AlO2-)>c(OH-)>c(CO32-) |
C | 0.015 | c(Na+)>c(HCO3-)>c(CO32-)> c(OH-) |
D | 0.03 | c(Na+)>c(HCO3-)> c(OH-)>c(H+) |
»¯Ñ§·´Ó¦ËÙÂÊÊÇͨ¹ýʵÑé²â¶¨µÄ£¬ÏÂÁл¯Ñ§·´Ó¦ËÙÂʵIJâÁ¿ÖУ¬²âÁ¿ÒÀ¾Ý²»¿ÉÐеÄÊÇ( )
Ñ¡Ïî | »¯Ñ§·´Ó¦ | ²âÁ¿ÒÀ¾Ý(µ¥Î»Ê±¼äÄÚ) |
A | 2NO2N2O4 | ÑÕÉ«Éîdz |
B | Zn+H2SO4=ZnSO4+H2 | H2Ìå»ý |
C | CO(g)+H2O(g)=CO2(g)+H2(g) | ѹǿ±ä»¯ |
D | Ca(OH)2+Na2CO3=CaCO3¡ý+2NaOH | ³ÁµíÖÊÁ¿ |