ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿25 ¡æʱ£¬¼¸ÖÖÈõËáµÄµçÀë³£ÊýÈçÏ£º
ÈõËữѧʽ | HNO2 | CH3COOH | HCN | H2CO3 |
µçÀë³£Êý | 5.1¡Á10-4 | 1.8¡Á10-5 | 6.2¡Á10-10 | K1=4.4¡Á10-7 K2=4.7¡Á10-11 |
£¨1£©¸ù¾ÝÉϱíÊý¾ÝÌî¿Õ£º
¢ÙÎïÖʵÄÁ¿Å¨¶ÈÏàͬµÄËÄÖÖËᣬÆäpHÓÉ´óµ½Ð¡µÄ˳ÐòÊÇ___________ £¨Óû¯Ñ§Ê½Ìîд£©¡£
¢Ú·Ö±ðÏòµÈÌå»ý¡¢ÏàͬpHµÄHClÈÜÒººÍCH3COOHÈÜÒºÖмÓÈë×ãÁ¿µÄZn·Û£¬·´Ó¦¸Õ¿ªÊ¼Ê±²úÉúH2µÄËÙÂÊ£ºv(HCl)______v(CH3COOH)£¨Ìî¡°£½¡±¡¢¡°£¾¡±»ò¡°£¼¡±ÏÂͬ£©£¬·´Ó¦ÍêÈ«ºó£¬ËùµÃÇâÆøµÄÖÊÁ¿£ºm(H2)ÑÎËá_______m(H2)´×Ëá¡£
¢Û½«0.2 mol/L HCNÈÜÒºÓë0.1 mol/L Na2CO3ÈÜÒºµÈÌå»ý»ìºÏ£¬·¢Éú·´Ó¦µÄ»¯Ñ§·½³ÌʽΪ___________________________¡£
£¨2£©Ìå»ý¾ùΪ10 mL¡¢pH¾ùΪ2µÄ´×ËáÈÜÒºÓëÒ»ÔªËáHX·Ö±ð¼ÓˮϡÊÍÖÁ1000 mL£¬Ï¡Ê͹ý³ÌÖÐÈÜÒºpH±ä»¯ÈçͼËùʾ¡£Ï¡Êͺó£¬HXÈÜÒºÖÐË®µçÀëµÄc(H£«)___´×ËáÈÜÒºÖÐË®µçÀëµÄc(H£«) £»µçÀë³£ÊýKa(HX)___Ka(CH3COOH)£¨Ìî¡°£¾¡±¡¢¡°£½¡±»ò¡°£¼¡±£©¡£
£¨3£©CO32- ¡¢ NO2- ¡¢CN-¡¢CH3COO-½áºÏH+µÄÄÜÁ¦ÓÉÇ¿µ½ÈõµÄ˳ÐòΪ_______________________£¨ÓÃÀë×Ó·ûºÅ±íʾ£©
¡¾´ð°¸¡¿ HCN > H2CO3 > CH3COOH > HNO2 = < HCN + Na2CO3 = NaCN + NaHCO3 > > CO32- > CN- > CH3COO- > NO2-
¡¾½âÎö¡¿£¨1£©¢Ù¾ÝµçÀëƽºâ³£ÊýµÄ´óС·ÖÎö£¬µçÀëƽºâ³£ÊýÔ½´ó£¬ÆäËáÐÔԽǿ£¬ËáÐÔ£ºHCN£¼H2CO3£¼CH3COOH£¼HNO2£¬ËáÐÔԽǿ£¬ÆäpHԽС£¬ËùÒÔpH¹ØϵΪ£ºHCN£¾H2CO3£¾CH3COOH£¾HNO2£»
¢ÚpHÏàͬµÄ²»Í¬ÈõËáÖУ¬ÇâÀë×ÓŨ¶ÈÏàͬ£¬ÓëZn·´Ó¦ËÙÂÊÏàͬ£»´×ËáÖÐËáµÄŨ¶È´óÓÚÇâÀë×ÓŨ¶È£¬ÑÎËáÖÐËáµÄŨ¶ÈµÈÓÚÇâÀë×ÓŨ¶È£¬ËùÒÔ´×ËáµÄŨ¶È´óÓÚHClµÄŨ¶È£¬ËùÒÔËùµÃÇâÆøµÄÖÊÁ¿£ºm£¨H2£©ÑÎË᣼m£¨H2£©´×Ë᣻
¢ÛÓɵçÀë³£Êý¿ÉÖª£¬ËáÐÔ£ºH2CO3£¾HCN£¾CO3-£¬Ôò½«0.2 mol/L HCNÈÜÒºÓë0.1 mol/L Na2CO3ÈÜÒºµÈÌå»ý»ìºÏ£¬·¢Éú·´Ó¦µÄ»¯Ñ§·½³ÌʽΪHCN+Na2CO3¨TNaCN+NaHCO3£»
£¨2£©ÓÉͼ¿ÉÖª£¬Ï¡Êͺó£¬HXµçÀëÉú³ÉµÄc£¨H+£©Ð¡£¬¶ÔË®µÄµçÀëÒÖÖÆÄÜÁ¦Ð¡£¬ËùÒÔHXÈÜÒºÖÐË®µçÀë³öÀ´µÄc£¨H+£©´ó£»Ï¡ÊÍÏàͬ±¶Êý£¬½ÏÇ¿µÄËápH±ä»¯½Ï´ó£¬½ÏÇ¿µÄËáµçÀë³£Êý½Ï´ó£¬ÓÉͼ¿É֪ϡÊÍÏàͬµÄ±¶Êý£¬HXµÄpH±ä»¯³Ì¶È´ó£¬ÔòËáÐÔHXÇ¿£¬µçÀëƽºâ³£Êý´ó£»
£¨3£©ËáÔ½Èõ£¬Ëá¸ùÀë×ÓÔ½Ò×Ë®½â£¬¼´½áºÏÖÊ×ÓµÄÄÜÁ¦Ô½Ç¿£¬ÔòCO32- ¡¢ NO2- ¡¢CN-¡¢CH3COO-½áºÏH+µÄÄÜÁ¦ÓÉÇ¿µ½ÈõµÄ˳ÐòΪCO32-£¾CN-£¾ CH3COO-£¾NO2-¡£
![](http://thumb2018.1010pic.com/images/loading.gif)
¡¾ÌâÄ¿¡¿Ó°Ï컯ѧ·´Ó¦ËÙÂʵÄÒòËغܶ࣬ij¿ÎÍâÐËȤС×éÓÃʵÑé·½·¨½øÐÐ̽¾¿¡£
£¨1£©È¡µÈÎïÖʵÄÁ¿Å¨¶È¡¢µÈÌå»ýµÄH2O2ÈÜÒº·Ö±ð½øÐÐH2O2µÄ·Ö½âʵÑ飬ʵÑ鱨¸æÈçϱíËùʾ£¨ÏÖÏóºÍ½áÂÛÂÔ£©¡£
ÐòºÅ | ζÈ/¡æ | ´ß»¯¼Á | ÏÖÏó | ½áÂÛ |
1 | 40 | FeCl3ÈÜÒº | ||
2 | 20 | FeCl3ÈÜÒº | ||
3 | 20 | MnO2 | ||
4 | 20 | ÎÞ |
¢ÙʵÑé1¡¢2Ñо¿µÄÊÇ________________¶ÔH2O2·Ö½âËÙÂʵÄÓ°Ïì¡£
¢ÚʵÑé2¡¢3µÄÄ¿µÄÊÇ_______________¡£
£¨2£©²éÎÄÏ׿ÉÖª£¬Cu2£«¶ÔH2O2·Ö½âÒ²Óд߻¯×÷Óã¬Îª±È½ÏFe3£«¡¢Cu2£«¶ÔH2O2·Ö½âµÄ´ß»¯Ð§¹û£¬¸ÃС×éµÄͬѧ·Ö±ðÉè¼ÆÁËÈçͼ¼×¡¢ÒÒËùʾµÄʵÑé¡£»Ø´ðÏà¹ØÎÊÌ⣺
¢Ù¶¨ÐÔ·ÖÎö£ºÈçͼ¼×¿Éͨ¹ý¹Û²ì________________£¬¶¨ÐԱȽϵóö½áÂÛ¡£ÓÐͬѧÌá³ö½«CuSO4ÈÜÒº¸ÄΪCuCl2ÈÜÒº¸üºÏÀí£¬ÆäÀíÓÉÊÇ_______________¡£
¢Ú¶¨Á¿·ÖÎö£ºÈçͼÒÒËùʾ£¬ÊµÑéʱÒÔÊÕ¼¯µ½40 mLÆøÌåΪ׼£¬ºöÂÔÆäËû¿ÉÄÜÓ°ÏìʵÑéµÄÒòËØ£¬ÊµÑéÖÐÐèÒª²âÁ¿µÄÊý¾ÝÊÇ_____________¡£
£¨3£©ËáÐÔ¸ßÃÌËá¼ØÈÜÒººÍ²ÝËáÈÜÒº¿É·¢Éú·´Ó¦£º2KMnO4£«5H2C2O4£«3H2SO4=K2SO4£«2MnSO4£«8H2O£«10CO2¡ü£¬ÊµÑéʱ·¢ÏÖ¿ªÊ¼·´Ó¦ËÙÂʽÏÂý£¬ÈÜÒºÍÊÉ«²»Ã÷ÏÔ£¬µ«Ò»¶Îʱ¼äºóͻȻÍÊÉ«£¬·´Ó¦ËÙÂÊÃ÷ÏÔ¼Ó¿ì¡£¶Ô´ËÕ¹¿ªÌÖÂÛ£º
¢ÙijͬѧÈÏΪKMnO4ÓëH2C2O4µÄ·´Ó¦ÊÇ ÈÈ·´Ó¦£¬µ¼ÖÂ_______________£»
¢Ú´ÓÓ°Ï컯ѧ·´Ó¦ËÙÂʵÄÒòËØ¿´£¬ÄãÈÏΪ»¹¿ÉÄÜÊÇ____________________µÄÓ°Ïì¡£ÒªÖ¤Ã÷ÄãµÄ²ÂÏ룬ʵÑé·½°¸ÊÇ ¡£