ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Îíö²ÑÏÖØÓ°ÏìÈËÃǵÄÉú»îÓ뽡¿µ¡£Ä³µØÇøµÄÎíö²ÖпÉÄܺ¬ÓÐÈçÏ¿ÉÈÜÐÔÎÞ»úÀë×Ó£ºNa+¡¢NH4+¡¢Mg2+¡¢Al3+¡¢SO42£¡¢NO3£¡¢Cl£¡£Ä³Í¬Ñ§ÊÕ¼¯Á˸õØÇøµÄÎíö²£¬¾±ØÒªµÄÔ¤´¦ÀíºóµÃÊÔÑùÈÜÒº£¬Éè¼Æ²¢Íê³ÉÁËÈçϵÄʵÑ飺
ÒÑÖª£º3NO3£+ 8Al + 5OH£+ 18H2O = 3NH3+ 8[Al(OH)4]£
¸ù¾ÝÒÔÉϵÄʵÑé²Ù×÷ÓëÏÖÏ󣬸ÃͬѧµÃ³öµÄ½áÂÛ²»ÕýÈ·µÄÊÇ( )
A. ÊÔÑùÖÐÒ»¶¨²»º¬Al3+
B. ÊÔÑùÖп϶¨´æÔÚNH4+¡¢Mg2+¡¢SO42£ºÍNO3£
C. ÊÔÑùÖпÉÄÜ´æÔÚNa+¡¢Cl£
D. ¸ÃÎíö²ÖпÉÄÜ´æÔÚNaNO3¡¢NH4ClºÍMgSO4
¡¾´ð°¸¡¿A
¡¾½âÎö¡¿ÊÔÌâ·ÖÎö£ºÆøÌå1Äܹ»Ê¹ÊªÈóµÄºìɫʯÈïÊÔÖ½±äÀ¶ÔòÆøÌåÊÇ°±Æø£¬ÄÇôÈÜÒºÖÐÒ»¶¨º¬ÓÐNH4+£¬³Áµí1ÓöËᲿ·ÖÈܽ⣬˵Ã÷ÓеijÁµí¿ÉÈÜÓÚËáÓеIJ»ÈÜÓÚËᣬ¼ÓÈëµÄÊǹýÁ¿µÄBa£¨OH£©2³Áµí²»¿ÉÄÜÓÐAl(OH)3ËùÒÔ³ÁµíÊÇBa SO4ºÍMg£¨OH£©2¿ÉÍƳöÔÈÜÒºÖÐÓÐMg2£«¡¢SO42-£¬ÈÜÒº1Öк¬ÓÐBa2+£¬ËùÒÔ³Áµí2ÖÐÓÐBaCO3£¬BaCO3ºÍAl£¨OH£©3¶¼¿ÉÈÜÓÚËᣬËùÒÔÎÞ·¨ÅжÏÊÇ·ñÓÐAl£¨OH£©3£¬¸ù¾ÝÌâÄ¿Ëù¸ø·½³ÌʽºÍÈÜÒº2µÄʵÑéÏÖÏóÖªÔÈÜÒºº¬ÓÐNO3-£¬¶Ô¸ÃʵÑéûÓÐÏÖÏó˵Ã÷ÓÐNa£«¡¢Cl££¬¸ù¾ÝÉÏÊö·ÖÎöÊÔÑùÖп϶¨´æÔÚNH4+¡¢Mg2£«¡¢SO42-ºÍNO3-£¬¿ÉÄܺ¬ÓÐAl3£«£¬Na£«¡¢Cl££¬¹ÊÑ¡A¡£
¡¾ÌâÄ¿¡¿ÏÂÁи÷ÏîÅжÏÍêÈ«ÕýÈ·µÄÊÇ£¨ £©
Ñ¡Ïî | ±ä»¯ | ¡÷H | ¡÷S | ·½ÏòÐÔ |
A | H2O(l)¡úH2O(g) | >0 | <0 | ·Ç×Ô·¢ |
B | 2NO2(g)N2O4(g) | <0 | <0 | ×Ô·¢ |
C | NH4Cl(s)=NH3(g)+HCl(g) | <0 | >0 | ·Ç×Ô·¢ |
D | 2Fe3+(aq)+Cu(s)=2Fe2+(aq)+Cu2+ (aq) | >0 | <0 | ×Ô·¢ |
A. A B. B C. C D. D