ÌâÄ¿ÄÚÈÝ

£¨13·Ö£©²ÄÁÏ1£ºÌú¼°Æ仯ºÏÎïÔÚ¹¤Å©Òµ¡¢Éú»îÖÐÓй㷺µÄÓ¦Ó᣸ßÌúËá¼Ø£¨K2FeO4£©¾ßÓм«Ç¿µÄÑõ»¯ÐÔ£¬ÊÇÒ»ÖÖÓÅÁ¼µÄË®´¦Àí¼Á¡£
£¨1£©ÒÑÖª£º4FeO42£­£«10H2O4Fe(OH)3£«8OH£­£«3O2¡£
K2FeO4ÔÚ´¦ÀíË®µÄ¹ý³ÌÖÐËùÆðµÄ×÷ÓÃÓР                                   ¡£
£¨2£©½«ÊÊÁ¿K2FeO4ÈܽâÓÚpH£½4.74µÄÈÜÒºÖУ¬ÅäÖƳÉc(FeO42£­) £½1.0 mmol¡¤L£­1µÄÊÔÑù£¬½«ÊÔÑù·Ö±ðÖÃÓÚ20¡æ¡¢30¡æ¡¢40¡æºÍ60¡æµÄºãÎÂˮԡÖУ¬²â¶¨c(FeO42£­)µÄ±ä»¯£¬½á¹û¼ûͼ¢ñ¡£¸ÃʵÑéµÄÄ¿µÄÊÇ                                                £»·¢Éú·´Ó¦µÄ¡÷H       0£¨Ìî¡°£¾¡±¡¢¡°£¼¡±»ò¡°£½¡±£©¡£
£¨3£©FeO42£­ÔÚË®ÈÜÒºÖеĴæÔÚÐÎ̬Èçͼ¢òËùʾ¡£ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ        £¨Ìî×Öĸ£©¡£
A£®²»ÂÛÈÜÒºËá¼îÐÔÈçºÎ±ä»¯£¬ÌúÔªËض¼ÓÐ4ÖÖ´æÔÚÐÎ̬
B£®ÏòpH£½10µÄÕâÖÖÈÜÒºÖмÓÁòËáÖÁpH£½2£¬HFeO4£­µÄ·Ö²¼·ÖÊýÖð½¥Ôö´ó
C£®ÏòpH£½6µÄÕâÖÖÈÜÒºÖмÓKOHÈÜÒº£¬·¢Éú·´Ó¦µÄÀë×Ó·½³ÌʽΪ£º
HFeO4£­£«OH£­£½FeO42£­£«H2O

²ÄÁÏ2£º»¯ºÏÎïKxFe(C2O4) y¡¤zH2O(FeΪ+3¼Û)ÊÇÒ»ÖÖ¹âÃô¸Ð²ÄÁÏ£¬ÊµÑéÊÒ¿ÉÒÔÓÃÈçÏ·½·¨ÖƱ¸ÕâÖÖ²ÄÁϲ¢²â¶¨Æä×é³É¡£
I£®ÖƱ¸£º

£¨4£©½á¾§Ê±Ó¦½«±¥ºÍÈÜÒºÔÚºÚ°µ´¦µÈ´ý¾§ÌåµÄÎö³ö£¬ÕâÑù²Ù×÷µÄÔ­ÒòÊÇ                                                        ¡£
£¨5£©²Ù×÷¢óµÄÃû³ÆÊÇ                                    ¡£
¢ò£®×é³É²â¶¨£º
³ÆÈ¡0.491gʵÑéËùµÃ¾§Ìå(¼ÙÉèÊÇ´¿¾»Îï)ÖÃÓÚ׶ÐÎÆ¿ÖУ¬¼Ó×ãÁ¿ÕôÁóË®ºÍÏ¡H2SO4¡£½«C2O42-Íêȫת»¯ÎªH2C2O4£¬ÓÃ0£®10mol¡¤L-1KMnO4ÈÜÒº½øÐе樣¬ÏûºÄKMnO4ÈÜÒº12£®00mLʱǡºÃ·´Ó¦£»ÔÙ¼ÓÈëÊÊÁ¿µÄ»¹Ô­¼Á£¬½«Fe3+Íêȫת»¯ÎªFe2+£¬ÓÃKMnO4ÈÜÒº¼ÌÐøµÎ¶¨£¬µ±Fe2+ÍêÈ«Ñõ»¯Ê±£¬ÓÃÈ¥KMnO4ÈÜÒº2£®00mL¡£Ïà¹Ø·´Ó¦ÈçÏ£º
2KMnO4+5H2C2O4+3H2SO4=2MnSO4+K2SO4+10CO2¡ü+8H2O
MnO4-+5Fe2++8H+=Mn2++5Fe3++4H2O
£¨6£©ÅäÖÆ250mL 0£®10mol¡¤L-1KMnO4ÈÜÒº¼°ÉÏÊöµÎ¶¨ÊµÑéÖÐËùÐèµÄ²£Á§ÒÇÆ÷³ýÉÕ±­¡¢²£Á§°ô¡¢½ºÍ·µÎ¹Ü¡¢Á¿Í²¡¢×¶ÐÎÆ¿Í⻹ÓР               ºÍ                ¡£Á½¸öµÎ¶¨Öе½´ïÖÕµãʱÈÜÒºÑÕɫΪ           É«£¬ÇÒ30ÃëÄÚ²»±äÉ«¡£
£¨7£©Í¨¹ý¼ÆË㣬Çó´Ë¹âÃô²ÄÁϵĻ¯Ñ§Ê½                              ¡£
£¨¹²13·Ö£©
£¨1£©É±¾úÏû¶¾¡¢Îü¸½Ðü¸¡Î»òÆäËûºÏÀí´ð°¸£©£¨¸÷1·Ö£¬¹²2·Ö£©
£¨2£©Ì½¾¿Î¶ȶÔFeO42£­Å¨¶ÈµÄÓ°Ï죨»òÆäËûºÏÀí´ð°¸£©£¨1·Ö£© £¾£¨1·Ö£©
£¨3£©C£¨1·Ö£©
£¨4£©ºÚ°µ¿ÉÒÔ·ÀÖ¹¾§Ìå·Ö½â£¨1·Ö£©£¨5£©¹ýÂË¡¢Ï´µÓ£¨¸÷1·Ö£¬¹²2·Ö£©
£¨6£©250mLÈÝÁ¿Æ¿¡¢ËáʽµÎ¶¨¹Ü£¨2·Ö£© ×Ϻ죨1·Ö£© (7) K3Fe(C2O4)3¡¤3H2O£¨2·Ö£©½âÎö:
£¨1£©K2FeO4ÖеÄÌúÔªËØ»¯ºÏÎï¸ß£¬ÓкÜÇ¿µÄÑõ»¯ÐÔ¾ßÓÐɱ¾úµÄ×÷Óã¬ÓÖÒòË®½â¿ÉÉú³É½ºÌ壬¿ÉÎü¸½Ðü¸¡Î¿ÉÓÃÀ´¾»Ë®¡£
£¨2£©£¨3£©¾ùÊÇͨ¹ýͼÏñÊÕ¼¯ÐÅÏ¢£¬½áºÏÌâÒ⼰֪ʶµÄ»ýÀÛ½øÐиÅÄî×ܽᡣÆðµã¸ßÂäµãµÍ¡£
£¨4£©£¨5£©£¨6£©¿¼²éһЩ»ù±¾µÄʵÑé²Ù×÷
£¨7£©MnO4-  +    5Fe2+  +   8H=  Mn2++5Fe3++4H2O
0.0002mol      0.001mol
2KMnO4      +     5H2C2O4+3H2SO4=2MnSO4+K2SO4+10CO2¡ü+8H2O
0.0012mol          0.003mol
¹Ê£º¿ÉÖª»¯Ñ§Ê½KxFe(C2O4) y¡¤zH2OµÄy =3£¬ÓÉ»¯ºÏ¼Û½øÒ»²½¿ÉÖªx=3
ÓÉ0.491g¼õÈ¥KxFe(C2O4) y¡¤µÄÖÊÁ¿£¬¿ÉÇó³öH2O µÄÖÊÁ¿Îª0.054g£¬¼´0.003mol
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø