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Form2 IS Q [急]
2010-6-1 08:15 PM
OoFINEoO
Form2 IS Q [急]
我想問下
中和酸既時候,一共落十滴鹼,,
落6滴鹼,,之後ph係3,,
再落多滴,,就即刻變ph9,,
點解會有咁大既改變???
HELP~
THZ`
2010-6-8 02:18 PM
viviyeung
搵個老師幫你補下lar
:s9s83OI: :s9s83OI:
2010-7-22 09:11 PM
`小豬仔=]wing
落左之後等一陣,再落會好d..我念係時間問題
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Form2 IS Q [急]
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