其實點解h2o2個樣咁對稱但都係polar
H2O2其實唔對稱 唔係planar 黎 (叫open book shape)
不過out syl的
[DSE化學2017]同學準備好DSE CHEM未?
化學艾維斯
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H2O2其實唔對稱 唔係planar 黎 (叫open book shape)
不過out syl的
今年大唔大機出calorimetry 無溫到呢part
肯定出啦
記得E=mc deltaT
點解釋metal mellable ?
呢個位想求詳解
metallic bond is non-directional ->
allow relative movement of metal atoms without breaking metallic bond
想知:
Alloy令到atom can't easily slide
咁樣同harder stronger有咩關係？
cannot slide -> less malleable -> harder
想問D 野
cu3+咩色。。？上網check 唔到
同埋石灰水加co2 到過量果2條式係咩？
cu3+唔會考啦 記common ion ok
CO2 + Ca(OH)2 -> CaCO3 + H2O
CaCO3 + CO2 + H2O -> Ca(HCO3)2
唔該曬
想問埋濃h2so4 同濃hcl 加cu 會有咩分別
呢類會唔會考？
會
呢個考你濃h2So4氧化性質
咁不如答埋我個分別
之前老師考過濃同稀h2so4 同hcl 加cu 既分別
但我冇左筆記
想問D 野
cu3+咩色。。？上網check 唔到
同埋石灰水加co2 到過量果2條式係咩？
cu3+唔會考啦 記common ion ok
CO2 + Ca(OH)2 -> CaCO3 + H2O
CaCO3 + CO2 + H2O -> Ca(HCO3)2
唔該曬
想問埋濃h2so4 同濃hcl 加cu 會有咩分別
呢類會唔會考？
絕對會
2014考過Cu + H2SO4/HNO3/CH3COOH
今年大唔大機出calorimetry 無溫到呢part
肯定出啦
記得E=mc deltaT
點解釋metal mellable ?
呢個位想求詳解
metallic bond is non-directional ->
allow relative movement of metal atoms without breaking metallic bond
想知:
Alloy令到atom can't easily slide
咁樣同harder stronger有咩關係？
cannot slide -> less malleable -> harder
But harder should be opposed to soft ?
I don't Understand this loo
想問D 野
cu3+咩色。。？上網check 唔到
同埋石灰水加co2 到過量果2條式係咩？
cu3+唔會考啦 記common ion ok
CO2 + Ca(OH)2 -> CaCO3 + H2O
CaCO3 + CO2 + H2O -> Ca(HCO3)2
唔該曬
想問埋濃h2so4 同濃hcl 加cu 會有咩分別
呢類會唔會考？
會
呢個考你濃h2So4氧化性質
咁不如答埋我個分別
之前老師考過濃同稀h2so4 同hcl 加cu 既分別
但我冇左筆記
稀H2SO4 ->普通酸
濃H2SO4 -> 氧化劑 出SO2
極稀HNO3 ->普通酸
稀HNO3 -> 氧化劑 出NO ->空氣中出NO2
濃HNO3 -> 強氧化劑 出NO2
HCl -> 濃定稀都係普通酸
想問D 野
cu3+咩色。。？上網check 唔到
同埋石灰水加co2 到過量果2條式係咩？
cu3+唔會考啦 記common ion ok
CO2 + Ca(OH)2 -> CaCO3 + H2O
CaCO3 + CO2 + H2O -> Ca(HCO3)2
係咪可以寫成H2CO3
想問下liquid liquid extraction 上面係咪一定係organic layer 下面就係aqueous layer?
今年大唔大機出calorimetry 無溫到呢part
肯定出啦
記得E=mc deltaT
點解釋metal mellable ?
呢個位想求詳解
metallic bond is non-directional ->
allow relative movement of metal atoms without breaking metallic bond
想知:
Alloy令到atom can't easily slide
咁樣同harder stronger有咩關係？
cannot slide -> less malleable -> harder
But harder should be opposed to soft ?
I don't Understand this loo
highly malleable 可以諗成隻metal soft 易變形
咁less malleable咪即係harder
肯定出啦
記得E=mc deltaT
點解釋metal mellable ?
呢個位想求詳解
metallic bond is non-directional ->
allow relative movement of metal atoms without breaking metallic bond
想知:
Alloy令到atom can't easily slide
咁樣同harder stronger有咩關係？
cannot slide -> less malleable -> harder
But harder should be opposed to soft ?
I don't Understand this loo
highly malleable 可以諗成隻metal soft 易變形
咁less malleable咪即係harder
Thanks!
想問D 野
cu3+咩色。。？上網check 唔到
同埋石灰水加co2 到過量果2條式係咩？
cu3+唔會考啦 記common ion ok
CO2 + Ca(OH)2 -> CaCO3 + H2O
CaCO3 + CO2 + H2O -> Ca(HCO3)2
係咪可以寫成H2CO3
唔得 我2015親身寫過 佢唔比分
想問下liquid liquid extraction 上面係咪一定係organic layer 下面就係aqueous layer?
唔係 例如CCl4 vs H2O CCl4會係下層
唔肯定就直接寫collect xxx layer 避左佢
想問下liquid liquid extraction 上面係咪一定係organic layer 下面就係aqueous layer?
唔係 例如CCl4 vs H2O CCl4會係下層
唔肯定就直接寫collect xxx layer 避左佢
者係點 唔明
同埋想問area of maxwellxxxxxxxxxxx graph係total no of molecules 定total no of mole of molecules?
想問下liquid liquid extraction 上面係咪一定係organic layer 下面就係aqueous layer?
唔係 例如CCl4 vs H2O CCl4會係下層
唔肯定就直接寫collect xxx layer 避左佢
者係點 唔明
即係大部分case油上水下
咁如果係答問題真係答取油相就得
唔該
想問下liquid liquid extraction 上面係咪一定係organic layer 下面就係aqueous layer?
唔係 例如CCl4 vs H2O CCl4會係下層
唔肯定就直接寫collect xxx layer 避左佢
者係點 唔明
你要extract果隻野係organic layer既話
就咁寫collect the organic layer
唔好寫上定下層
同埋想問area of maxwellxxxxxxxxxxx graph係total no of molecules 定total no of mole of molecules?
total number of molecule
咩係allotrope?