Out c野嚟
唔駛驚😂
[DSE化學2018]同學準備好DSE CHEM未?
化學艾維斯
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bond strain 點解唔係NF3 大d，NF3 has smaller bond angle
唔跟octet rule 哥d唔駛
實係用AlCl3 解dative la 
一黎就用咁深點解唔用complex ions
一黎就用咁深點解唔用complex ionsFor NCl3 electron density closer to N greater bond pair bond pair repulsion
NF3 electron density is closer to F
Less repulsion
NF3 electron density is closer to F
Less repulsion
you can say the size of Cl is greater than that of F and it makes a greater repulsion but you can't say it has greater bond strain since NF3 is more deviated from the ideal bond angle
例如？
雖然撈緊補習不過都有野問
岩岩經過書局拎左本9星期睇下
見到zinc carbon cell 個cathodic reaction 有啲奇怪
又寫話nh4cl 唔係oa
中學個陣一路都係學cathode 係將
Nh4+ 變nh3 h2加埋mno2 食左h2 兩條式合埋（學校同補習都係咁教）
同埋個h on changes from +1 to 0 理論上麵係oa
如果考試要你寫zinc carbon cell 個oa 應該要寫埋nh4cl and mno2?
Cathodic reaction 又係咪寫nh4+ + mno2 呢條？
N 個o.s 都無變
N 個o.s 都無變
雖然撈緊補習不過都有野問
岩岩經過書局拎左本9星期睇下
見到zinc carbon cell 個cathodic reaction 有啲奇怪
又寫話nh4cl 唔係oa
中學個陣一路都係學cathode 係將
Nh4+ 變nh3 h2加埋mno2 食左h2 兩條式合埋（學校同補習都係咁教）
同埋個h on changes from +1 to 0 理論上麵係oa
如果考試要你寫zinc carbon cell 個oa 應該要寫埋nh4cl and mno2?
Cathodic reaction 又係咪寫nh4+ + mno2 呢條？
H 係nh4+ 係+1
變左H2 係0
steam reform咪CH4 + H2O -> 3H2 + CO果個
整methanol用
整methanol用
the product H2 will be used in further reacti9n so there is no net change in ON of H