ÌâÄ¿ÄÚÈÝ
£¨10·Ö£©ÔËÓÃÏà¹ØÔÀí£¬»Ø´ðÏÂÁи÷СÌ⣺
£¨1£©25¡æʱ£¬Ä³FeCl3ÈÜÒºµÄpH=2£¬ÔòÓÉË®µçÀë²úÉúµÄ×Üc(OH-)= £»ÓÃÀë×Ó·½³Ìʽ±íʾFeCl3ÈÜÒºÓÃÓÚ¾»Ë®µÄÔÒò ¡£
£¨2£©ÒÑÖªNaHSO4ÔÚË®ÖеĵçÀë·½³ÌʽNaHSO4£½Na+£«H+£«SO42-¡£
ÔÚNaHSO4ÈÜÒºÖÐc(H+) c(OH-)£«c(SO42-)£¨Ìî¡°>¡±¡¢¡°£½¡±»ò¡°<¡±ÏÂͬ£©£»ÓÃÁòËáÇâÄÆÓëÇâÑõ»¯±µÈÜÒºÖÆÈ¡ÁòËá±µ£¬ÈôÈÜÒºÖÐSO42-ÍêÈ«³Áµí£¬Ôò·´Ó¦ºóÈÜÒºµÄpH 7¡£
£¨3£©½«0.02mol/LNa2SO4ÈÜÒºÓëijŨ¶ÈBaCl2ÈÜÒºµÈÌå»ý»ìºÏ£¬ÔòÉú³ÉBaSO4³ÁµíËùÐèÔBaCl2ÈÜÒºµÄ×îСŨ¶ÈΪ ¡£(ÒÑÖªKsp(BaSO4)£½1.1¡Á10-10)
£¨4£©Ð´³öÏÂÁз´Ó¦µÄ»¯Ñ§·½³Ìʽ£º
±½µÄÏõ»¯·´Ó¦ ¡£ ÒÒ´¼µÄ´ß»¯Ñõ»¯·´Ó¦ ¡£
£¨1£©25¡æʱ£¬Ä³FeCl3ÈÜÒºµÄpH=2£¬ÔòÓÉË®µçÀë²úÉúµÄ×Üc(OH-)= £»ÓÃÀë×Ó·½³Ìʽ±íʾFeCl3ÈÜÒºÓÃÓÚ¾»Ë®µÄÔÒò ¡£
£¨2£©ÒÑÖªNaHSO4ÔÚË®ÖеĵçÀë·½³ÌʽNaHSO4£½Na+£«H+£«SO42-¡£
ÔÚNaHSO4ÈÜÒºÖÐc(H+) c(OH-)£«c(SO42-)£¨Ìî¡°>¡±¡¢¡°£½¡±»ò¡°<¡±ÏÂͬ£©£»ÓÃÁòËáÇâÄÆÓëÇâÑõ»¯±µÈÜÒºÖÆÈ¡ÁòËá±µ£¬ÈôÈÜÒºÖÐSO42-ÍêÈ«³Áµí£¬Ôò·´Ó¦ºóÈÜÒºµÄpH 7¡£
£¨3£©½«0.02mol/LNa2SO4ÈÜÒºÓëijŨ¶ÈBaCl2ÈÜÒºµÈÌå»ý»ìºÏ£¬ÔòÉú³ÉBaSO4³ÁµíËùÐèÔBaCl2ÈÜÒºµÄ×îСŨ¶ÈΪ ¡£(ÒÑÖªKsp(BaSO4)£½1.1¡Á10-10)
£¨4£©Ð´³öÏÂÁз´Ó¦µÄ»¯Ñ§·½³Ìʽ£º
±½µÄÏõ»¯·´Ó¦ ¡£ ÒÒ´¼µÄ´ß»¯Ñõ»¯·´Ó¦ ¡£
£¨10·Ö£©
£¨1£©10-2mol/L £¨1·Ö£© Fe3++3H2OFe(OH)3(½ºÌå)+3H+ £¨1·Ö£©
£¨2£© =£¨1·Ö£© >£¨1·Ö£©
£¨3£© 2.2¡Á10-8mol/L£¨2·Ö£© £¨4£©2 C2H5OH + O2 2 CH3CHO + 2H2O£¨¸÷2·Ö£©
£¨1£©10-2mol/L £¨1·Ö£© Fe3++3H2OFe(OH)3(½ºÌå)+3H+ £¨1·Ö£©
£¨2£© =£¨1·Ö£© >£¨1·Ö£©
£¨3£© 2.2¡Á10-8mol/L£¨2·Ö£© £¨4£©2 C2H5OH + O2 2 CH3CHO + 2H2O£¨¸÷2·Ö£©
ÊÔÌâ·ÖÎö£º£¨1£©FeCl3ÊÇÇ¿ËáÈõ¼îÑΣ¬ÈÜÓÚË®·¢ÉúË®½â³ÉËáÐÔ£¬¼´Fe3++3H2OFe(OH)3(½ºÌå)+3H+£¬H+È«²¿ÊÇÓÉË®µçÀëÉú³ÉµÄ£¬pH=2£¬c(H+)=10-2mol/L£¬c(OH-)Ë®= c(H+)Ë®=10-2mol/L¡£½ºÌåÄÜÎü¸½Àë×Ó£¬´ïµ½¾»Ë®µÄÄ¿µÄ¡££¨2£©ÔÚNaHSO4ÈÜÒºÖеÄH+À´×ÔË®µÄµçÀëºÍNaHSO4ÔÚË®ÖеĵçÀ룬 OH-ÊÇÓÉË®µÄµçÀ룬c(OH-)Ë®µÈÓÚÓÉË®µçÀëµÄc(H+)Ë®£¬c(SO42-)µÈÓÚÓÉNaHSO4ÔÚË®ÖеĵçÀëµÄH+µÄc(H+)£¬Òò´Ëc(H+)=c(OH-)£«c(SO42-)¡£ÈôÈÜÒºÖÐSO42-ÍêÈ«³Áµí£¬NaHSO4+Ba(OH)2= BaSO4¡ý+H2O+NaOH£¬·´Ó¦ºóÈÜÖÊΪNaOH£¬³Ê¼îÐÔ£¬pH>7¡££¨3£©ÉèËùÐèÔBaCl2ÈÜÒºµÄ×îСŨ¶ÈΪx,Ksp(BaSO4)= c(Ba2+)* c(SO42-),1.1¡Á10-10=(0.02/2)*(x/2),½âµÃx=2.2¡Á10-8mol/L¡£
µãÆÀ£º±¾Ìâ֪ʶ¿ç¶È½Ï´ó£¬Ë¼¿¼ÈÝÁ¿´ó¡£ÔÚÈÜÒºÖУ¬ÇâÀë×ÓŨ¶È³ËÒÔÇâÑõ¸ùÀë×ÓµÄŨ¶ÈµÈÓÚË®µÎÀë×Ó»ý³£Êý£¬¶øÓÉË®µçÀëµÄÇâÑõ¸ùÀë×ÓµÄŨ¶ÈµÈÓÚÓÉË®µçÀëµÄÇâÀë×ÓµÄŨ¶È¡£NaHSO4ÔÚË®ÖÐÊÇÍêÈ«µçÀë¡£KspµÄ¼ÆË㣬¶ÔÓÚÎïÖÊAnBm£¨s£©="n" Am+(aq)+ mBn-(aq), ÈܶȻý(Ksp)=(C(Am+) )^n ( C(Bn-))^m¡£
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿