我想問d野~

紫心兒

titrate 25 cm^3 portion of the diluted mixture (oxalic acid and oxalate) against the given standardized 0.2M KMnO[size=-2]4. for each titration, you should add 20 cm^3 bencd dilute H[size=-2]2SO[size=-2]4 and heat the mixture to above 70度 before adding the permanganate. Further heating is necessary during the titration as the mixture is cooled down.

我想問點解個temperature below 70度會點?

同埋點解唔可以determine the conc. of permanganate by weighing and dissolving in a known volume of water


thx~

[ Last edited by 紫心兒 on 15-10-2005 at 09:46 AM ]

紫心兒

銀公主

係都唔係呢版問la

FlyingDonkey

rate 問題, 我覺得

同 水有 rxn

紫心兒

Originally posted by FlyingDonkey at 2005-10-15 11:06 AM:
rate 問題, 我覺得

同 水有 rxn

MatthewChor

increase rate...

FlyingDonkey

Originally posted by FlyingDonkey at 2005-10-15 11:06 AM:
rate 問題, 我覺得

同 水有 rxn

遲 D inorganic 學, 係水無可能有 Mn2+, 而是 MnO2, 詳細自己睇書

2076

可能低過70度無reaction掛
free energy>0 (拿 亂吹ga ja唔好真係寫落去)

第2個問題呢...
點解要determine個conc. 佢唔係畀左你啦咩 0.2M

FlyingDonkey

Originally posted by 2076 at 2005-10-15 11:29 AM:
可能低過70度無reaction掛
free energy>0 (拿 亂吹ga ja唔好真係寫落去)

第2個問題呢...
點解要determine個conc. 佢唔係畀左你啦咩 0.2M

discussion 可以問個 0.2M 點 determine 的嘛

2076

Originally posted by FlyingDonkey at 2005-10-15 11:31 AM:

discussion 可以問個 0.2M 點 determine 的嘛

咁點解唔可以?

FlyingDonkey

Originally posted by 2076 at 2005-10-15 11:32 AM:


咁點解唔可以?

柒樓

2076

Originally posted by FlyingDonkey at 2005-10-15 11:34 AM:

柒樓

未學inorganic 有咩書推介下?
依家淨係睇notes ja