ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ä³»¯Ñ§ÐËȤС×é¶Ôµç½âÖÊÈÜÒº×÷ÈçϵĹéÄÉ×ܽᣨ¾ùÔÚ³£ÎÂÏ£©¡£ÆäÖÐÕýÈ·µÄÊÇ
A. pH=3µÄÇ¿ËáÈÜÒº1mL£¬¼ÓˮϡÊÍÖÁ100mLºó£¬ÈÜÒºpH½µµÍ2¸öµ¥Î»
B. 1L 0.50mol¡¤L-1NH4Cl ÈÜÒºÓë2L 0.25mol¡¤L-1NH4Cl ÈÜÒºº¬NH4+ÎïÖʵÄÁ¿ºóÕß´ó
C. pH=8.3µÄNaHCO3ÈÜÒº£ºc(Na+)£¾c(HCO3£)£¾c(CO32-)£¾c(H2CO3)
D. pH=4¡¢Å¨¶È¾ùΪ0.1mol¡¤L-1µÄCH3COOH¡¢CH3COONa»ìºÏÈÜÒºÖУºc(CH3COO£)£c(CH3COOH)=2[c(H£«)£c(OH£)]=
¡¾´ð°¸¡¿D
¡¾½âÎö¡¿
Ëá¼ÓˮϡÊÍ£¬ÇâÀë×ÓŨ¶È½µµÍ£¬pHÉý¸ß£»ï§¸ùÀë×ÓÔÚË®ÈÜÒºÖлᷢÉúË®½â£¬NH4ClŨ¶ÈԽС£¬NH4£«Ë®½â³Ì¶ÈÔ½´ó£»NaHCO3ÈÜÒºÏÔ¼îÐÔ£¬Ì¼ËáÇâ¸ùÀë×ÓµÄË®½â³Ì¶È´óÓÚµçÀë³Ì¶È£¬Ë®½âÉú³É̼ËᣬµçÀëÉú³É̼Ëá¸ùÀë×Ó£¬¾Ý´ËÅжϣ»³£ÎÂÏ£¬»ìºÏÒºpH=4£¬£¬ÔòÓÉKw¿ÉÖª£¬£¬ÓɵçºÉÊغã¿ÉÖª£¬c(CH3COO£)£c(Na£«)=c(H£«)-c(OH£)£¬¾ÝÎïÁÏÊغ㣺2c(Na£«)= c£¨CH3COOH£©£«c(CH3COO£)£¬¾Ý´Ë·ÖÎö¡£
A£®pH=3µÄÇ¿Ëá¼ÓˮϡÊÍ£¬pHÉý¸ß£¬¹Ê²»·ûºÏÌâÒ⣻
B£®²»Í¬Å¨¶ÈµÄͬÖÖÈÜÒº£¬Å¨¶ÈԽС£¬Ë®½â³Ì¶ÈÔ½´ó£¬NH4ClÈÜÒºÖÐNH4£«Ë®½â³Ì¶È´ó£¬¹Ê²»·ûºÏÌâÒ⣻
C£®NaHCO3ÈÜÒºÏÔ¼îÐÔ£¬ËµÃ÷HCO3µÄË®½â³Ì¶È´óÓÚµçÀë³Ì¶È£¬ÆäÀë×ÓŨ¶È¹ØϵΪc(Na£«)>c(HCO3£)>c(H2CO3)>c(CO32£)£¬¹Ê²»·ûºÏÌâÒ⣻
D£®³£ÎÂÏ£¬»ìºÏÒºpH=4£¬ÔòÓÉK¿ÉÖª£¬£¬ÓɵçºÉÊغã¿ÉÖª£¬c(CH3COO£)£c(Na£«)=c(H£«)£c(OH£)£¬¾ÝÎïÁÏÊغ㣺
2c(Na£«)= c£¨CH3COOH£©£«c(CH3COO£)£¬ÕûÀíµÃ£ºc(CH3COO£)£c(CH3COOH)=2[c(H£«)£c(OH£)]=£¬¹Ê·ûºÏÌâÒ⣻
¹ÊÑ¡D¡£
¡¾ÌâÄ¿¡¿´×ËáÑǸõË®ºÏÎï[Cr(CH3COO)2]22H2O²¿·ÖÐÅÏ¢ÈçÏ£º
ÎïÀíÐÔÖÊ | »¯Ñ§ÐÔÖÊ |
ºì×ØÉ«¾§Ì壬΢ÈÜÓÚÒÒ´¼£¬ÄÑÈÜÓÚÀäË®ºÍÒÒÃÑ(Ò×»Ó·¢µÄÓлúÈܼÁ) | ¾ßÓÐÇ¿»¹ÔÐÔ£¬Ò×±»Ñõ»¯ |
ÖƱ¸ÔÀí£º2Cr2£«(aq)£«4CH3COO£(aq)£«2H2O(l)£½[Cr(CH3COO)2]22H2O(s)¡£
ijÐËȤС×éÉè¼ÆʵÑéÖƱ¸[Cr(CH3COO)2]22H2O(s)¡£
»Ø´ðÏÂÁÐÎÊÌ⣺
(1)ÒÇÆ÷AµÄÃû³ÆÊÇ_____¡£
(2)¼ì²é×°ÖÃBÆøÃÜÐԵIJÙ×÷·½·¨ÊÇ_____¡£
(3)¼ÓÈëÑÎËáºó£¬¹Ø±ÕK1£¬´ò¿ªK2£¬½«×°ÖÃBÖеĵ¼¹Ü³é³öÒºÃæÒÔÉÏÒ»¶Îʱ¼ä£¬Ä¿µÄÊÇ____¡£·´Ó¦¿ªÊ¼ºó£¬´Ó×°ÖÃBÖп´µ½µÄÏÖÏóÊÇÈÜÒºÓÉÉîÂÌÉ«(Cr3£«)±äΪÁÁÀ¶É«(Cr2£«)£¬ÇÒÓÐÆøÅݲúÉú¡£Ð´³ö×°ÖÃBÖз¢ÉúµÄ·ÇÖû»·´Ó¦µÄÀë×Ó·½³Ìʽ£º_____¡£
(4)µ±ÇâÆøµÄ·Å³öËÙÂʽϿìʱ£¬ÎªÁËʹװÖÃBÖÐÈÜÒº½øÈë×°ÖÃCÖУ¬Ò˲ÉÈ¡µÄ²Ù×÷ÊÇ_____£»×°ÖÃDÖе¼¹Ü¿ÚË®·âµÄÄ¿µÄÊÇ_____¡£
(5)½«×°ÖÃCÖÐËùµÃ²úÆ·Ìá´¿£¬Æä²Ù×÷ÒÀ´ÎΪ¹ýÂË¡¢È¥ÑõˮϴµÓ¡¢ÒÒÃÑÏ´µÓ¡£Ïà¶ÔÒÒ´¼»òË®£¬ÓÃÒÒÃÑÏ´µÓµÄÓŵãÓÐ______¡£
(6)²â¶¨²úÆ·´¿¶È£ºÈ¡ag²úÆ·ÈÜÓÚÕôÁóË®£¬Í¨Èë×ãÁ¿¿ÕÆø£¬³ä·Ö·´Ó¦ºó£¬¼ÓÈë¹ýÁ¿ÇâÑõ»¯ÄÆÈÜÒº£¬¹ýÂË¡¢Ï´µÓ¡¢×ÆÉÕ¡¢³ÆÖØ¡£µÃCr2O3ÖÊÁ¿Îªmg(¼ÙÉèÔÓÖʲ»²ÎÓë·´Ó¦)£¬[Cr(CH3COO)2]22H2O(s)µÄĦ¶ûÖÊÁ¿ÎªMg¡¤mol£1¡£²âµÃ²úÆ·´¿¶ÈΪ____ %¡£(Óú¬a¡¢m¡¢MµÄ´úÊýʽ±íʾ)