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zerohead
½û³æ (Ö°Òµ×÷¼Ò)
- ·ÒëEPI: 466
- Ó¦Öú: 1 (Ó×¶ùÔ°)
- ¹ó±ö: 0.301
- ½ð±Ò: 8727.8
- Ìû×Ó: 3768
- ÔÚÏß: 471.7Сʱ
- ³æºÅ: 1041741
¡ï ¡ï
ringzhu(½ð±Ò+2, ·ÒëEPI+1): 2011-03-02 12:59:24
ringzhu(½ð±Ò+2, ·ÒëEPI+1): 2011-03-02 12:59:24
|
ÉýÎÂÖÁ80oC£¬±£³Öζȣ¬Ã¿¸ô15min¼ÓÈëKMnO4 35g£¬¹²¼ÓÁù´Î£¬·´Ó¦ÒºÓÉ×ÏÉ«±äΪºÚºÖÉ«£¬ÇÒ²úÉúMnO2³Áµí Heating up and maintain the temperature at 80oC, then add 35g KMnO4 every 15min, total 6 times. The colour of the reaction solution would change from purple to dark brown. In addition, MnO2 precipitates would be produced. |
2Â¥2011-02-16 14:34:26
¡ï ¡ï
ringzhu(½ð±Ò+2): 2011-03-02 12:59:32
ringzhu(½ð±Ò+2): 2011-03-02 12:59:32
| Temperature to keep temperature 80oC, every 15min join 35g, total KMnO4 add six times, reaction liquid by purple to a dark brown, and produce MnO2 precipitation |
3Â¥2011-02-16 14:41:29
charleygan
ÖÁ×ðľ³æ (ÖøÃûдÊÖ)
- ·ÒëEPI: 99
- Ó¦Öú: 496 (˶ʿ)
- ¹ó±ö: 0.005
- ½ð±Ò: 13167.2
- Ìû×Ó: 2396
- ÔÚÏß: 399.5Сʱ
- ³æºÅ: 859768
¡ï ¡ï
ringzhu(½ð±Ò+2): 2011-03-02 12:59:42
ringzhu(½ð±Ò+2): 2011-03-02 12:59:42
| The solution is heated up to 80 degree C and the temperature is maintained, then 35g of KMnO4 is added every 15min, total 6 times. The color of the solution would change from purple to dark brown and the precipitate of MnO2s would be obtained. |
4Â¥2011-02-23 17:01:22













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