I-See 論壇 » 功課討論區 » 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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