[DSE化學2017]同學準備好DSE CHEM未?

1001 回覆
44 Like 6 Dislike
2017-04-12 12:57:20
屌冇背到cu h2so4(l)

琴日冇睇post?

起身冇入program
當年AL入曬c/ s/ cu react with h2so4
2017-04-12 12:58:32
我都考完
平心而論真係難左
特別paper 1 LQ
2017-04-12 12:59:50
今年真係玩野
出enthalpy change cycle
2017-04-12 13:00:14
考完第一個感覺，出卷果個一定係屎忽鬼
feel到佢的惡意
2017-04-12 13:00:22
今年真係玩野
出enthalpy change cycle

好彩識畫
2017-04-12 13:00:57
我都考完
平心而論真係難左
特別paper 1 LQ

有題h2o2我計左5xx moldm-3
預自己錯硬
2017-04-12 13:01:39
我都考完
平心而論真係難左
特別paper 1 LQ

有題h2o2我計左5xx moldm-3
預自己錯硬

我1000moldm-3
2017-04-12 13:01:45
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎
2017-04-12 13:01:51
我都考完
平心而論真係難左
特別paper 1 LQ

有題h2o2我計左5xx moldm-3
預自己錯硬


我好似計左1
2017-04-12 13:01:52
考完
2017-04-12 13:02:09
我都考完
平心而論真係難左
特別paper 1 LQ

有題h2o2我計左5xx moldm-3
預自己錯硬

我1000moldm-3

應該1M
2017-04-12 13:02:15
我都考完
平心而論真係難左
特別paper 1 LQ

有題h2o2我計左5xx moldm-3
預自己錯硬


我好似計左1

1 +1
2017-04-12 13:02:30
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?
2017-04-12 13:02:45
有冇人講下paper 1B大概出左d咩？
2017-04-12 13:03:11
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

係 大約50000:1
HA>>>>A-
2017-04-12 13:03:24
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

49xxx: 1
佢係問HA to A-
2017-04-12 13:04:01
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

係 大約50000:1
HA>>>>A-

點計 完全諗唔到
2017-04-12 13:04:03
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

electrolysis of H2SO4 有咩難？
2017-04-12 13:04:24
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

49xxx: 1
佢係問HA to A-

係 個陣都心諗伏到你
2017-04-12 13:06:22
有冇mc答案
2017-04-12 13:06:51
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

係 大約50000:1
HA>>>>A-

點計 完全諗唔到

pH=-log[H+]
K=[A-][H+]/[HA]
2017-04-12 13:07:06
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

係 大約50000:1
HA>>>>A-

點計 完全諗唔到

shift log左個pH計返[H+]
再代返入Kc=(A-)(H+)/(HA)度計

不過我想講計唔難
下面問加NaOH果度先難
2017-04-12 13:07:14
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

electrolysis of H2SO4 有咩難？

轉咗H2SO4有冇change in observation?
2017-04-12 13:07:37
paper 1最難應該係electrolysis H2SO4同果舊organic compound HA->A- + H+果舊 indicator黎

1:49xxx?

係 大約50000:1
HA>>>>A-

點計 完全諗唔到

pH=-log[H+]
K=[A-][H+]/[HA]


我係咁做。。。。點解出唔到依啲答案
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