chem 高手請入

想問點解呢條係C而不是B
感謝

chromium sulphate is insoluble?

但(NH4)2 SO3 同 NH4CL 2個都係ionic compound

Chloride個potential 高過dichromate所以chloride唔可以比dichromate oxidised

係喎

Thx

sulfite有還原性

Dichromate ion cannot oxidize chloride ion because dichromate ion occupies a higher position on ECS than chloride ion, however, dichromate ion can easily oxidize sulphite ion to sulphate ion, and hence leading to the colour change.

Lee San: My Chem is good

No more than Four 姐
Btw thx

double bond shift 到天荒地暗

下,你唔背個還原table你成個redox等炒啦
最撚緊要既野都唔記
電解又要用,普通chem cell又要用
等gg

catalytic hydration技術上可行 但CE野 DSE無正式學 會有風險 儘量用返syllabus內識既方法做啦

反而改次序 第一步用LiAlH4/NaBH4先 之後再HBr then NaOH都無問題

chromate同dichromate氧化唔到chloride

soluble㗎喎
如果唔係點做chrome tanning

呢種hydration工業上好似真係得，但唔會冇任何catalyst嘅情況吓做到掛
不過org chem我真係唔太熟