20¡æ | 60¡æ | 100¡æ | |
Na2SO4 | 19.5 | 45.3 | 42.5 |
Na2Cr2O7[À´Ô´£º] | 183 | 269 | 415 |
·ÖÎö £¨1£©ÒÔº¬ÓÐCr£¨OH£©3¡¢Al2O3¡¢ZnO¡¢CuO¡¢NiOµÈÎïÖʵĵç¶ÆÎÛÄàΪÔÁÏ£¬ºæ¸Éºó¼ÓÈë̼ËáÄƺÍÑõÆø¸ßÎÂ×ÆÉÕ·¢Éú·´Ó¦4Cr£¨OH£©3+4Na2CO3+3O2$\frac{\underline{\;¸ßÎÂ\;}}{\;}$4Na2CrO4+6H2O+4CO2£¬Al2O3+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2AlO3+CO2¡ü£¬ZnO+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2ZnO2+CO2¡ü£¬Ë®½þºó¹ýÂ˵õ½ÂËÔüCuO¡¢NiO£¬ÂËҺΪNa2CrO4£¬NaAlO2¡¢Na2ZnO2µÈ£¬µ÷½ÚÈÜÒºPH³ÁµíZnO22-Àë×ÓºÍÆ«ÂÁËá¸ùÀë×Ó£¬¹ýÂ˵õ½ÂËÒºNa2CrO4£¬ÂËÔü¢òµÄÖ÷Òª³É·ÖÓÐZn£¨OH£©2¡¢Al£¨OH£©3£¬ÂËÒºNa2CrO4¼ÓÈëÁòËáËữÉú³ÉÖظõËáÄÆÈÜÒº£¬Í¨¹ýÌá´¿µÃµ½ÖظõËáÄÆ£¬¾Ý´Ë·ÖÎö£»
£¨2£©¸ù¾ÝÅжÏƽºâ״̬µÄ·½·¨£ºVÕý=VÄ棬»ò¸÷×é·ÖµÄŨ¶È±£³Ö²»±äÔò˵Ã÷ÒÑ´ïƽºâ£¬
A£®ÈÜÒºµÄpHÖµ±£³Ö²»±ä£¬ËµÃ÷ÇâÀë×ÓŨ¶È²»±ä£¬ÄÜÅжÏƽºâ£»
B£®¦ÍÕý£¨Cr2O72-£©=$\frac{1}{2}$¦ÍÕý£¨CrO42-£©=2¦ÍÄ棨CrO42-£©£¬VÕý¡ÙVÄæ²»ÄÜÅжÏƽºâ£»
C£®Cr2O72-ºÍCrO42-µÄŨ¶ÈÏàͬȡ¾öÓÚÆðʼŨ¶ÈºÍת»¯£¬²»ÄÜÅжÏƽºâ£»
D£®ÈÜÒºµÄÑÕÉ«²»±ä£¬ÎªÌØÕ÷¶¨£¬ÄÜÅжÏƽºâ£»
£¨3£©Ëữʱ·¢ÉúµÄ·´Ó¦Îª£º2CrO42-+2H+?Cr2O72-+H2O£¬-
¸ù¾ÝÊغãÁйØϵʽ£º2Cr¡«2CrO42-¡«Cr2O72-£¬ÁÐʽ¼ÆËãµÃn£¨Cr2O72-£©ºÍn£¨CrO42-£©Ê£Óࣻ
½ø¶øÇó³öËữºóËùµÃÈÜÒºÖÐc£¨Cr2O72-£©
¢Ú¸ù¾Ý·´Ó¦ 2CrO42-+2H+¨T?Cr2O72-+H2O
¼°Æ½ºâ³£ÊýK¨T2¡Á1013£¬½øÐмÆË㣻
£¨4£©ÏòNa2Cr2O7ÓëH2SO4»ìºÏÒºÖмÓÈëH2O2Éú³ÉCrO5£¬Na2SO4ºÍH2O£¬¾Ý´ËÊéд·½³Ìʽ£®
½â´ð ½â£ºÒÔº¬ÓÐCr£¨OH£©3¡¢Al2O3¡¢ZnO¡¢CuO¡¢NiOµÈÎïÖʵĵç¶ÆÎÛÄàΪÔÁÏ£¬ºæ¸Éºó¼ÓÈë̼ËáÄƺÍÑõÆø¸ßÎÂ×ÆÉÕ·¢Éú·´Ó¦4Cr£¨OH£©3+4Na2CO3+3O2$\frac{\underline{\;¸ßÎÂ\;}}{\;}$4Na2CrO4+6H2O+4CO2£¬Al2O3+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2AlO3+CO2¡ü£¬ZnO+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2ZnO2+CO2¡ü£¬Ë®½þºó¹ýÂ˵õ½ÂËÔüCuO¡¢NiO£¬ÂËҺΪNa2CrO4£¬NaAlO2¡¢Na2ZnO2µÈ£¬µ÷½ÚÈÜÒºPH³ÁµíZnO22-Àë×ÓºÍÆ«ÂÁËá¸ùÀë×Ó£¬¹ýÂ˵õ½ÂËÒºNa2CrO4£¬ÂËÔü¢òµÄÖ÷Òª³É·ÖÓÐZn£¨OH£©2¡¢Al£¨OH£©3£¬ÂËÒºNa2CrO4¼ÓÈëÁòËáËữÉú³ÉÖظõËáÄÆÈÜÒº£¬Í¨¹ýÌá´¿µÃµ½ÖظõËáÄÆ£¬ÔòÂËÔü¢óµÄÖ÷Òª³É·ÝΪNa2SO4•10H2O£¬
£¨1£©¸ù¾ÝÒÔÉÏ·ÖÎö£¬±ºÉÕ¹ý³ÌÖÐÉú³ÉNa2CrO4µÄ»¯Ñ§·½³ÌʽΪ4Cr£¨OH£©3+4Na2CO3+3O2$\frac{\underline{\;¸ßÎÂ\;}}{\;}$4Na2CrO4+6H2O+4CO2£¬Al2O3+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2AlO3+CO2¡ü£¬ZnO+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2ZnO2+CO2¡ü£¬Ë®½þºóÈÜÒºÖгýNa2CrO4¡¢NaAlO2Í⻹´æÔÚµÄÈÜÖÊÓÐNa2ZnO2£¬ÂËÒºNa2CrO4¼ÓÈëÁòËáËữÉú³ÉÖظõËáÄÆÈÜÒº£¬Í¨¹ýÌá´¿µÃµ½ÖظõËáÄÆ£¬ÔòÂËÔü¢óµÄÖ÷Òª³É·ÝΪNa2SO4•10H2O£»
¹Ê´ð°¸Îª£º4Cr£¨OH£©3+4Na2CO3+3O2$\frac{\underline{\;¸ßÎÂ\;}}{\;}$4Na2CrO4+6H2O+4CO2£¬Al2O3+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2AlO3+CO2¡ü£¬ZnO+Na2CO3$\frac{\underline{\;¸ßÎÂ\;}}{\;}$Na2ZnO2+CO2¡ü£»Na2ZnO2£»Na2SO4•10H2O£»
£¨2£©¸ù¾ÝÅжÏƽºâ״̬µÄ·½·¨£ºVÕý=VÄ棬»ò¸÷×é·ÖµÄŨ¶È±£³Ö²»±äÔò˵Ã÷ÒÑ´ïƽºâ£¬
A£®ÈÜÒºµÄpHÖµ±£³Ö²»±ä£¬ËµÃ÷ÇâÀë×ÓŨ¶È²»±ä£¬ÄÜÅжÏƽºâ£¬¹ÊAÕýÈ·£»
B£®¦ÍÕý£¨Cr2O72-£©=$\frac{1}{2}$¦ÍÕý£¨CrO42-£©=2¦ÍÄ棨CrO42-£©£¬VÕý¡ÙVÄæ²»ÄÜÅжÏƽºâ£¬¹ÊB´íÎó£»
C£®Cr2O72-ºÍCrO42-µÄŨ¶ÈÏàͬȡ¾öÓÚÆðʼŨ¶ÈºÍת»¯£¬²»ÄÜÅжÏƽºâ£¬¹ÊC´íÎó£»
D£®ÈÜÒºµÄÑÕÉ«²»±ä£¬ÎªÌØÕ÷¶¨£¬ÄÜÅжÏƽºâ£¬¹ÊDÕýÈ·£»
¹Ê´ð°¸Îª£ºAD£»
£¨2£©Ëữʱ·¢ÉúµÄ·´Ó¦Îª£º2CrO42-+2H+?Cr2O72-+H2O£¬Èô1LËữºóËùµÃÈÜÒºÖк¬¸õÔªËصÄÖÊÁ¿Îª23.4g£¬CrO42-ÓÐ$\frac{8}{9}$ת»¯ÎªCr2O72-£¬ËµÃ÷¸õÔªËØ$\frac{8}{9}$ת»¯ÎªCr2O72-
¸ù¾ÝÊغãÁйØϵʽ£º2Cr¡«2CrO42-¡«Cr2O72-
2 1
$\frac{23.4¡Á\frac{8}{9}}{52}$ n£¨Cr2O72-£©
µÃn£¨Cr2O72-£©=0.2mol£»n£¨CrO42-£©Ê£Óà=0.05mol£»
Ôò¢ÙËữºóËùµÃÈÜÒºÖÐc£¨Cr2O72-£©=$\frac{n}{V}$=0.2mol•L-1£»¹Ê´ð°¸Îª£º0.2mol•L-1£»
¢ÚÉèH+µÄÎïÖʵÄÁ¿Å¨¶ÈΪamol/L£¬
2CrO42-+2H+¨T?Cr2O72-+H2O
ƽºâ£¨mol/L£© 0.05 a 0.2
ƽºâ³£ÊýK=$\frac{0.2}{0.05{\;}^{2}¡Áa{\;}^{2}}$¨T2¡Á1013£¬
Ôòa=4¡Á10-7mol£¬PH=7-2lg2=6.4£¬
¹Ê´ð°¸Îª£º6.4£»
£¨4£©ÏòNa2Cr2O7ÓëH2SO4»ìºÏÒºÖмÓÈëH2O2Éú³ÉCrO5£¬Na2SO4ºÍH2O£¬Ôò·½³ÌʽΪ£ºNa2Cr2O7+4H2O2+H2SO4¨T2CrO5+Na2SO4+5H2O£¬¹Ê´ð°¸Îª£»Na2Cr2O7+4H2O2+H2SO4¨T2CrO5+Na2SO4+5H2O£®
µãÆÀ ±¾Ì⿼²éÁËÎïÖʵķÖÀëÌá´¿Á÷³Ì£¬Ö÷Òª¿¼²éÁ˲Ù×÷Á÷³Ì·ÖÎö¡¢Æ½ºâ״̬µÄÅжϡ¢ÈܶȻý³£ÊýµÄ¼ÆËã¡¢·½³ÌʽµÄÊéдµÈ£¬ÌâÄ¿ÄѶÈÖеȣ¬²àÖØÓÚ¿¼²éѧÉú·ÖÎöÎÊÌâ¡¢½â¾öÎÊÌâÄÜÁ¦ºÍ¼ÆËãÄÜÁ¦£®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A×é | B×é |
¢ñ£®H-F¼üµÄ¼üÄÜ´óÓÚH-O¼üµÄ¼üÄÜ | ¢ÙHFµÄ·Ðµã±ÈH2OµÍ |
¢ò£®H-H¡FÇâ¼üµÄ¼üÄÜ´óÓÚO-H¡OÇâ¼üµÄ¼üÄÜ | ¢ÚHF±ÈH2OÎȶ¨ |
¢ó£®HF·Ö×Ó¼äÄÜÐγɵÄÇâ¼ü¸öÊý±ÈH2O·Ö×ÓÉÙ | ¢ÛHFµÄ·Ðµã±ÈH2O¸ß |
¢ô£®HF·Ö×ÓÓëË®·Ö×Ó¿ÉÐγÉÇâ¼ü | ¢ÜHF¼«Ò×ÈÜÓÚË® |
A£® | I¢Ú | B£® | ¢ò¢Û | C£® | ¢ó¢Ù | D£® | ¢ó¢Ü |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
ÎÂ¶È | K1 | K2 |
973K | 1.47 | 2.38 |
1173K | 2.15 | 1.67 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | Mg2+¡¢NH${\;}_{4}^{+}$¡¢OH-¡¢SO${\;}_{4}^{2-}$ | B£® | Na+¡¢H+¡¢Cl-¡¢HCO${\;}_{3}^{-}$ | ||
C£® | Na+¡¢K+¡¢AlO${\;}_{2}^{-}$¡¢CO${\;}_{3}^{2-}$ | D£® | H++¡¢K+¡¢MnO${\;}_{4}^{-}$¡¢SO${\;}_{3}^{2-}$ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | O2-µÄ½á¹¹Ê¾ÒâͼΪ![]() | |
B£® | ij΢Á£ºËÍâµç×ÓÅŲ¼Îª2¡¢8¡¢8½á¹¹£¬Ôò¸Ã΢Á£Ò»¶¨ÊÇë²Ô×Ó | |
C£® | NH4+ÓëH3O+¾ßÓÐÏàͬµÄÖÊ×ÓÊýºÍµç×ÓÊý | |
D£® | F-¡¢Na+¡¢Mg2+¡¢Al3+ÊÇÓëHeÔ×Ó¾ßÓÐÏàͬµç×Ó²ã½á¹¹µÄÀë×Ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | ´ò¿ªÆ¡¾ÆÆ¿¸ÇºóÓдóÁ¿ÅÝÄÒç³ö | |
B£® | ʵÑéÊÒÓÃÅű¥ºÍʳÑÎË®µÄ·½·¨ÊÕ¼¯ÂÈÆø | |
C£® | ÈȵĴ¿¼îÈ¥ÓÍÎÛÄÜÁ¦¸üÇ¿ | |
D£® | ÏÄÌ콫ʳƷ´¢²ØÔÚ±ùÏäÖÐ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖл¯Ñ§ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
![]() | ![]() | ![]() | ![]() |
Æû³µÎ²Æø | ·ÙÉÕ·ÏÆúËÜÁÏ | ¾ÓÊÒ×°äê | ×÷ÖÆÀä¼Á |
A | B | C | D |
A£® | A | B£® | B | C£® | C | D£® | D |
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com