Zinc -carbon cell

Author Message   991097 Username: 991097 Registered: 04-2003 Posted on Thursday, May 15, 2003 - 10:25 pm:    What will happened if the cell remove MnO2??   Chio U Kim Username: cuk Registered: 04-2003 Posted on Friday, May 16, 2003 - 06:42 pm:    The voltage of the cell will drop rapidly on discharge.   ØpØpØpØpØpØpØpØpØp.... yan~* Username: 991160 Registered: 04-2003 Posted on Friday, May 16, 2003 - 06:47 pm:    ¨ä¹ê¤@¯ëÃD¥Ø·|­ø·|ËÝ°Ýor·|°ÝÃþ¦ü¬J°ÝÃD~?   Chio U Kim Username: cuk Registered: 04-2003 Posted on Friday, May 16, 2003 - 07:01 pm:    Do you know why the voltage of the cell drops rapidly on discharge?   ØpØpØpØpØpØpØpØpØp.... yan~* Username: 991160 Registered: 04-2003 Posted on Friday, May 16, 2003 - 07:02 pm:    §Ú­ø«Y¤Ó²M·¡   Chio U Kim Username: cuk Registered: 04-2003 Posted on Friday, May 16, 2003 - 07:14 pm:    MnO2 is used to remove(by oxidation) the hydrogen gas formed at the carbon electrode. 2MnO2 + H2 ® Mn2O3 + H2O Without MnO2, the non-conducting hydrogen gas will cover the carbon electrode making it difficult to conduct electricity. So the voltage of the cell drops rapidly. Hydrogen gas is formed at the carbon electrode according to the following half equation : 2NH4+ + 2e- ® 2NH3 + H2   ØpØpØpØpØpØpØpØpØp.... yan~* Username: 991160 Registered: 04-2003 Posted on Friday, May 16, 2003 - 07:17 pm:    ®@...©ú¥Õ©ú¥Õ.. §Y«Y¦pªGÉN¥ªmno2´N·|remove­ø¨ìd hydrogen ´N·|Åͨì¦nÃø³q¨ì¹q.. o©¥­øo©¥~?   Chio U Kim Username: cuk Registered: 04-2003 Posted on Friday, May 16, 2003 - 07:20 pm:    Bingo!   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 09:18 pm:    Will the cell Ãz¬µ ??   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 09:25 pm:    Whyy have to use zinc as the case ??   ØpØpØpØpØpØpØpØpØp.... yan~* Username: 991160 Registered: 04-2003 Posted on Friday, May 16, 2003 - 09:30 pm:    §Úı±o­Ócell­ø·|Ãz~ §ÚçÜ...¨ä¹ê­ø«Y¤@©w­n¥Îzinc case ¦n¦üalkaline-manganese cellËݤX..³£­ø«Y¥Îzinc.. §Ú­øª¾o©¥­øo©¥~ ¤£¹L§ÚçÜ«YËÝ..   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 09:58 pm:    But i heard some people said the cell will Ãz(of couse not so large la!)!!! =o='   ¢Ö¢ñ¢ö¢ï¡ã Username: 981909 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:06 pm:    §A¸Õ¤U¿N¤UÊ\Ú»¤UÃz­øÃz   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:12 pm:    So dangerous wow~~ =~=   ØpØpØpØpØpØpØpØpØp.... yan~* Username: 991160 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:17 pm:    §Ú³£­ø«Y¸Ü¿N..~   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:21 pm:    ??   Chio U Kim Username: cuk Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:36 pm:    You are right, Hing~ ! Used cells should not be put into fire. Otherwise, the chemicals inside would decompose vigorously and cause an explosion.   ØpØpØpØpØpØpØpØpØp.... yan~* Username: 991160 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:38 pm:    ­ø«Y°Ý´NËÝ·|­ø·|Ãz«§(§Y°_¤@¯ë¬J±¡ªp¤U)...   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:38 pm:    I see la!! Thx~~~   ¢Ö¢ñ¢ö¢ï¡ã Username: 981909 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:43 pm:    ¤@¯ë¬J±¡ªp¤U§Y«Y«§±¡ªp.. «Y¤Ó¶§¤U³£¦³¥i¯àÃz..   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:46 pm:    wa!!   ¢Ö¢ñ¢ö¢ï¡ã Username: 981909 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:49 pm:    ¥D­n«Y°ª·Å·|¥OÊ\Ãz   Sapphire Username: 991097 Registered: 04-2003 Posted on Friday, May 16, 2003 - 10:52 pm:    Will ma??Only °ª·Å??