ÌâÄ¿ÄÚÈÝ
ÒÑÖªÏÂÃæÈý¸öÊý¾Ý£º7.2¡Á10-4 mol¡¤L-1¡¢4.6¡Á10-4 mol¡¤L-1¡¢4.9¡Á10-10 mol¡¤L-1·Ö±ðÊÇÏÂÁÐÓйصÄÈýÖÖËáµÄµçÀë³£ÊýµÄÊýÖµ£¬ÈôÒÑÖªÏÂÁз´Ó¦¿ÉÒÔ·¢Éú£ºNaCN+HNO2===HCN+NaNO2¡¡NaCN+HF===HCN+NaFNaNO2+HF===HNO2+NaF£¬
ÓÉ´Ë¿ÉÅжÏÏÂÁÐÐðÊö²»ÕýÈ·µÄÊÇ
- A.NaCNºÍHCN ÎïÖʵÄÁ¿±È1©U1×é³ÉµÄ»ìºÏÈÜÒº³ÊËáÐÔ
- B.ÎïÖʵÄÁ¿Å¨¶È¾ùΪ0.1mol¡¤l-1µÄNaF¡¢NaNO2¡¢NaCNÈÜÒºµÄpHÖð½¥Ôö´ó
- C.¸ù¾ÝÉÏÊöijÁ½¸ö·´Ó¦¼´¿ÉµÃ³öµçÀë³£Êý´óСµÄ½áÂÛ
- D.µçÀë³£ÊýΪ£ºK(HCN)<K(HNO2)<K(HF)
A
¸ù¾ÝÇ¿ËáÖÆÈõËᣬÓÉÈý¸ö·½³Ìʽ¿ÉÒÀ´ÎÖªµÀÈýÖÖËáµÄËáÐÔÇ¿Èõ£ºHNO2>HCN¡¢HF>HCN¡¢HF>HNO2£¬¼´HF>HNO2>HCN£¬DÕýÈ·£¬Æäʵ¸ù¾ÝµÚÒ»ºÍµÚÈý¸ö·´Ó¦¼´¿ÉµÃ³öÉÏÊö½áÂÛ£¬¹ÊCÕýÈ·£»¸ù¾ÝÔ½ÈõԽˮ½â¿ÉÖª£¬Å¨¶ÈÏàͬµÄNaF¡¢NaNO2¡¢NaCNÈÜÒºµÄpHÖð½¥Ôö´ó£¬BÕýÈ·£»¶øÓÉÓÚHCNµÄËáÐÔÌ«Èõ£¬ÆäÄÆÑÎÀàµÄË®½âºÜÇ¿£¬ÔòŨ¶ÈÏàͬµÄµÄNaCN¡¢HCN»ìºÏÈÜÒº³Ê¼îÐÔ£¬¹ÊA²»ÕýÈ·£¬´ð°¸ÎªA
¸ù¾ÝÇ¿ËáÖÆÈõËᣬÓÉÈý¸ö·½³Ìʽ¿ÉÒÀ´ÎÖªµÀÈýÖÖËáµÄËáÐÔÇ¿Èõ£ºHNO2>HCN¡¢HF>HCN¡¢HF>HNO2£¬¼´HF>HNO2>HCN£¬DÕýÈ·£¬Æäʵ¸ù¾ÝµÚÒ»ºÍµÚÈý¸ö·´Ó¦¼´¿ÉµÃ³öÉÏÊö½áÂÛ£¬¹ÊCÕýÈ·£»¸ù¾ÝÔ½ÈõԽˮ½â¿ÉÖª£¬Å¨¶ÈÏàͬµÄNaF¡¢NaNO2¡¢NaCNÈÜÒºµÄpHÖð½¥Ôö´ó£¬BÕýÈ·£»¶øÓÉÓÚHCNµÄËáÐÔÌ«Èõ£¬ÆäÄÆÑÎÀàµÄË®½âºÜÇ¿£¬ÔòŨ¶ÈÏàͬµÄµÄNaCN¡¢HCN»ìºÏÈÜÒº³Ê¼îÐÔ£¬¹ÊA²»ÕýÈ·£¬´ð°¸ÎªA
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
³£ÎÂÏ£¬ÒÑÖªÏÂÃæÈý¸öÊý¾Ý£º7.2¡Á10£4¡¢4.6¡Á10£4¡¢4.9¡Á10£10·Ö±ðÊÇÈýÖÖËáµÄµçÀëƽºâ³£Êý£¬ÈôÒÑÖªÕâЩËá¿É·¢ÉúÈçÏ·´Ó¦£º¢ÙNaCN£«HNO2===HCN£«NaNO2£¬ ¢ÚNaCN£«HF===HCN£«NaF£¬¢ÛNaNO2£«HF===HNO2£«NaF¡£
³£ÎÂÏ£¬ÓÉ´Ë¿ÉÅжÏÏÂÁÐÐðÊöÖУ¬²»ÕýÈ·µÄÊÇ£¨ £©
A£®HFµÄµçÀëƽºâ³£ÊýΪ7.2¡Á10£4 |
B£®HNO2µÄµçÀëƽºâ³£ÊýΪ4.9¡Á10£10 |
C£®¸ù¾Ý¢Ù¢ÛÁ½¸ö·´Ó¦¼´¿ÉÖªÈýÖÖËáµÄÏà¶ÔÇ¿Èõ |
D£®HNO2µÄµçÀëƽºâ³£Êý±ÈHCN´ó£¬±ÈHFС |