ÌâÄ¿ÄÚÈÝ
£¨15·Ö£©
MnO2ÔÚËáÐÔÈÜÒºÖоßÓÐÇ¿Ñõ»¯ÐÔ£¬¿É±»»¹ÔΪMn2+£¬Ëü»¹¶ÔH2O2µÄ·Ö½â¾ßÓÐÁ¼ºÃµÄ´ß»¯Ð§¹û¡£Ä³ÐËȤС×éͨ¹ýʵÑéÑо¿MnO2µÄÐÔÖÊ
£¨1£©¸ÃС×éÉè¼ÆÁËÈçÏÂ4¸ö·½°¸ÒÔÑéÖ¤MnO2µÄÑõ»¯ÐÔ£¬¿ÉÐеÄÊÇ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£
A£®°ÑMnO2¹ÌÌå¼ÓÈëµ½FeSO4ÈÜÒºÖУ¬ÔÙ¼ÓÈëKSCNÈÜÒº£¬¹Û²ìÈÜÒºÊÇ·ñ±äºì |
B£®°ÑMnO2¹ÌÌå¼ÓÈëµ½FeCl3ÈÜÒºÖУ¬ÔÙ¼ÓÈëKSCNÈÜÒº£¬¹Û²ìÈÜÒºÊÇ·ñ±äºì |
C£®°ÑMnO2¹ÌÌå¼ÓÈëµ½Na2SO3ÈÜÒºÖУ¬ÔÙ¼ÓÈëBaCl2¹Û²ìÊÇ·ñÓа×É«³ÁµíÉú³É |
D£®°ÑMnO2¹ÌÌå¼ÓÈ뵽ϡÑÎËáÖУ¬¹Û²ìÊÇ·ñÓлÆÂÌÉ«ÆøÌåÉú³É |
ʵÑé | Ëá»ò¼î | ÏÖÏó |
A | 1µÎ0.2mol/LNaOHÈÜÒº | ²»±äÉ« |
B | 1µÎË® | »ºÂý±ädz×غÖÉ« |
C | 1µÎ0.1mol/LÁòËáÈÜÒº | ѸËÙ±ä×غÖÉ« |
д³öÔÚËáÐÔÌõ¼þÏ£¬MnO2Ñõ»¯I£µÄÀë×Ó·½³Ìʽ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ ¡£
£¨3£©Óû̽¾¿MnO2µÄ´ß»¯Ð§¹û£¬ÐèÒªÓÃ30%µÄH2O2ÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©ÅäÖÆŨ¶È3%µÄH2O2ÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©100mL¡£ÆäÅäÖÆ·½·¨ÊÇ£ºÓÃÁ¿Í²Á¿È¡¡¡¡¡¡¡mL30%H2O2ÈÜÒº·ÅÈë¡¡¡¡¡¡¡¡£¨ÌîÒÇÆ÷Ãû³Æ£©ÖУ¬ÔÙ¼ÓÈëÒ»¶¨Á¿µÄË®£¬½Á°è¾ùÔÈ¡£
£¨4£©ÔÚʵÑéʱ£¬Ä³Í¬Ñ§°Ñ1µÎKIÈÜÒºÎóµÎÈëµ½¹ýÁ¿µÄ5mL3%µÄH2O2ÈÜÒºÖУ¬·¢ÏÖ²úÉúÁË´óÁ¿ÆøÅÝ¡£¸ÃС×é²éÔĵ½KIÓëH2O2¿É·¢ÉúÈçÏ·´Ó¦£º2KI£«H2O2£½KOH£«I2£¬ÈÏΪÓпÉÄÜÊÇ·´Ó¦²úÎïI2ÆðÁË´ß»¯H2O2·Ö½âµÄ×÷Óá£ÇëÉè¼ÆÒ»¸ö¼òµ¥ÊµÑéÖ¤Ã÷¸Ã¼ÙÉèÊÇ·ñÕýÈ·¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£
£¨5£©ÊµÑéÊÒÓöþÑõ»¯Ã̺ÍŨÑÎËáÖÆÈ¡ÂÈÆø£¬ÏÂÁÐÒÇÆ÷¿É×÷Ϊ¸Ã·´Ó¦µÄ·´Ó¦ÈÝÆ÷µÄÊÇ £¨ÌîÐòºÅ£©¡£
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡A ¡¡ B C D
£¨6£©¶þÑõ»¯ÃÌ¿ÉÓÃÓÚÖÆ×÷¸Éµç³Ø£¬µç³Ø×Ü·´Ó¦Îª£ºZn£«2MnO2£«2NH4£«£½Zn2£«£«Mn2O3£«2NH3£«H2O£¬ÔòÆäÕý¼«µÄµç¼«·´Ó¦Ê½Îª ¡¡¡¡¡¡¡¡ ¡£
£¨1£©A £¨2·Ö£©
£¨2£©ËáÐÔԽǿ£¬MnO2Ñõ»¯ÐÔԽǿ £¨2·Ö£©
MnO2 + 2I£ + 4H+£½Mn2££«I2 + 2H2O £¨3·Ö£©
£¨3£©10.0 ÉÕ± £¨¸÷1·Ö£¬¹²2·Ö£©
£¨4£©È¡5mL3%µÄH2O2ÈÜÒºÓÚÊÔ¹ÜÖУ¬µÎÈë1µÎµâË®£¬¹Û²ìÊÇ·ñÓдóÁ¿ÆøÅݲúÉú£¬ÈôÓÐ˵Ã÷¼ÙÉèÕýÈ·£»·´Ö®¼ÙÉè²»ÕýÈ·¡£ £¨2·Ö£©
£¨5£©A D £¨1·Ö£©
£¨6£©2MnO2£«2NH4£«+ 2e¡ª= Mn2O3£«2NH3£«H2O £¨3·Ö£©
½âÎö