2008-8-29 17:44
♁mInG♁
,請chem高手入><關於F4 SIMPLECHEMICAL CELLS AND ELECTROLYSIS的問題
w:003: 其實我想問點解係simple chemical cells 水唔可以去做reaction,即係話假設做oxidation果邊有野搵到去放電,但係做reduction果邊,就搵唔到,可唔可以搵水既oh- ions去做reduction係electrolyte呢?係咪因為WATER/DISTILLED WATER IS SLIGHTLY ionized 所以有好少既mobile ions 去放電子,少左電苛去通電...同埋我想問係electrolysis度,係一蛋逼性既reaction,咁樣點解又唔可以就咁拎d水去做電解--,一定要electrolyte,反正有d既electrolysis 既case 只不過係水去做電解,其他既ions唔做reaction係d electrolyte,點解呢?=v= 另外7仲想問假如問你係electroysis ,d水係用左去做電解,其他既ions係electrolyte度又冇,而係正極果度有3份O2,負極果邊有2份H2既gas出左,咁ph value 有冇邊?咁會唔會係因為一邊有3份,另外一邊得2份出,相對黎講負極係少左h+ ions去做reduction, 所以多d h+ ions較oh-ions為多係個electrolyte度,所以係會變acidic?..另外仲有我想問concentration高會唔會影響ph value係electrolyte?有冇人解答得到,我會好感激您架!!!!!