[DSE化學2018]同學準備好DSE CHEM未?

想問下點解HF HCl就係covalent bond,
NH4NO3就係ionic bond?
明明HCl都可以ionise出ions 佢既特性唔係ionic bond? 上網搵左好耐D人都話covalent, 但又無講點解

自推

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

想問下點解HF HCl就係covalent bond,
NH4NO3就係ionic bond?
明明HCl都可以ionise出ions 佢既特性唔係ionic bond? 上網搵左好耐D人都話covalent, 但又無講點解

自推

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

yes dissociation not equal to ionisation
but HCl -> H+ + Cl- is ionisation (formation of ion)

Master in advanced org chem留名
巴打d 5*好勁
當年我AL Chem得E

想問下點解HF HCl就係covalent bond,
NH4NO3就係ionic bond?
明明HCl都可以ionise出ions 佢既特性唔係ionic bond? 上網搵左好耐D人都話covalent, 但又無講點解

自推

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

yes dissociation not equal to ionisation
but HCl -> H+ + Cl- is ionisation (formation of ion)

my notes 參考下

Master in advanced org chem留名
巴打d 5*好勁
當年我AL Chem得E

AL chem又真係難既
當年我讀AL chem上大學chem
grad左出黎我會話AL果陣學既野會深刻d

想問下點解HF HCl就係covalent bond,
NH4NO3就係ionic bond?
明明HCl都可以ionise出ions 佢既特性唔係ionic bond? 上網搵左好耐D人都話covalent, 但又無講點解

自推

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

yes dissociation not equal to ionisation
but HCl -> H+ + Cl- is ionisation (formation of ion)

HCl in water -> H3O+ + Cl-
我會話 M -> M+ + e- 係ionisation
但係HCl個case明顯唔係
你可以睇睇enthapy change既先野

想問下點解HF HCl就係covalent bond,
NH4NO3就係ionic bond?
明明HCl都可以ionise出ions 佢既特性唔係ionic bond? 上網搵左好耐D人都話covalent, 但又無講點解

自推

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

yes dissociation not equal to ionisation
but HCl -> H+ + Cl- is ionisation (formation of ion)

HCl in water -> H3O+ + Cl-
我會話 M -> M+ + e- 係ionisation
但係HCl個case明顯唔係
你可以睇睇enthapy change既先野

by definition 啦
ionisation要由無ion變有ion
dissociation要涉及bond breaking
以HCl form H+ Cl-計 其實兩個definition佢都乎合
而我都好相信chem黎講你叫HCl -> H+ Cl-做ionisation都唔會話你錯

ionisation唔係焗限於由M->M+
任何無ion變成有ion既過程都可以定義為ionisation

自推

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

yes dissociation not equal to ionisation
but HCl -> H+ + Cl- is ionisation (formation of ion)

HCl in water -> H3O+ + Cl-
我會話 M -> M+ + e- 係ionisation
但係HCl個case明顯唔係
你可以睇睇enthapy change既先野

by definition 啦
ionisation要由無ion變有ion
dissociation要涉及bond breaking
以HCl form H+ Cl-計 其實兩個definition佢都乎合
而我都好相信chem黎講你叫HCl -> H+ Cl-做ionisation都唔會話你錯

ionisation唔係焗限於由M->M+
任何無ion變成有ion既過程都可以定義為ionisation

如果你咁define ionisation 你既answer當然無問題
但係我會define ionisation as formation of ions by addition or removal of electrons
根據我既definition 你個answer就有問題
仲有睇番bond enthapy
我地會叫 delta E(HCl -> H+ + Cl-) 做standard enthapy change of dissociation 而唔係ionisation
delta E (M -> M+ + e-) 同 (X + e- -> X-)先係ionisation
Base on上面既野我只可以話你既definition不夠嚴謹

NH4NO3係NH4+同NO3-之間ionic bond
而NH4+入面有N-H covalent bond
NO3-入面有N-O covalent bond

留意ionic bond唔一定要metal+non metal

HCl本身係covalent bond黎
但溶水後佢會經過ionization呢個process變成H+ & Cl-
但咁樣唔代表HCl係ionic
係要睇返HCl pure form果時個bonding

Dissociation =/= ionisation

yes dissociation not equal to ionisation
but HCl -> H+ + Cl- is ionisation (formation of ion)

HCl in water -> H3O+ + Cl-
我會話 M -> M+ + e- 係ionisation
但係HCl個case明顯唔係
你可以睇睇enthapy change既先野

by definition 啦
ionisation要由無ion變有ion
dissociation要涉及bond breaking
以HCl form H+ Cl-計 其實兩個definition佢都乎合
而我都好相信chem黎講你叫HCl -> H+ Cl-做ionisation都唔會話你錯

ionisation唔係焗限於由M->M+
任何無ion變成有ion既過程都可以定義為ionisation

如果你咁define ionisation 你既answer當然無問題
但係我會define ionisation as formation of ions by addition or removal of electrons
根據我既definition 你個answer就有問題
仲有睇番bond enthapy
我地會叫 delta E(HCl -> H+ + Cl-) 做standard enthapy change of dissociation 而唔係ionisation
delta E (M -> M+ + e-) 同 (X + e- -> X-)先係ionisation
Base on上面既野我只可以話你既definition不夠嚴謹

咁講啦
大家個分歧在於ionisation定義包唔包埋lose:gain electron呢個要求啫

如果你以enthalpy change為主角去討論既
咁呢個term用黎講remove/add electron係好正確既

之但係如果你講acid base個behavior
我唔認為一定要指明M->M+ or M -> M-先可以定義為ionization

同一個term用落唔同topic 我又覺得唔可以一刀切既 正如你話一隻野係唔係acid都可以有好多定義方法

況且 如果你要計accurate既definition
你可以睇下IUPAC個定義
https://goldbook.iupac.org/html/I/I03183.html

或者好簡單咁講 acid dissolve in water to generate H+ ion 呢個過程 我都相信你答10次係ionisation應該10次都無人話唔啱

2017 dse level1
識少少basic 嘢
想問應該由邊度入手最容易
Aim2咋

2017 dse level1
識少少basic 嘢
想問應該由邊度入手最容易
Aim2咋

認真答你
計mol
acid base
redox
fossil fuel
呢幾課會考程度 但加埋佔paper 1 起碼50分

樓主個補習係自己做定同人夾黎做

樓主個補習係自己做定同人夾黎做

我同我partner都有做補習
但暫時係獨立做
將來有機會既咪合作攪

樓主個補習係自己做定同人夾黎做

我同我partner都有做補習
但暫時係獨立做
將來有機會既咪合作攪

介唔介意留個tg 傾下計

樓主個補習係自己做定同人夾黎做

我同我partner都有做補習
但暫時係獨立做
將來有機會既咪合作攪

介唔介意留個tg 傾下計

歡迎
TG: elvislamchem
t.me/elvislamchem

學校啊sir講aim4 50%多啲就有
係咪真

明你講咩 但都係唔明點解佢地唔一樣bonding
NH4NO3
HCl
H2SO4
大家嘅behaviour差唔多但係唔同bonding ?

學校啊sir講aim4 50%多啲就有
係咪真

通常係近60%分數左右
但全港chem考生有超過一半人攞lv4或以上
依家時候尚早 不如aim高少少

明你講咩 但都係唔明點解佢地唔一樣bonding
NH4NO3
HCl
H2SO4
大家嘅behaviour差唔多但係唔同bonding ?

你讀中幾？
如果學埋microscopic world II果課 學左electronegativity同polar bond 應該會識解
NH4+同NO3-就純粹cation anion兩個走埋一齊有electrostatic attraction (ionic bond)
HCl同H2SO4就covalent bond only靠atom之間sharing electrons互相吸引

明你講咩 但都係唔明點解佢地唔一樣bonding
NH4NO3
HCl
H2SO4
大家嘅behaviour差唔多但係唔同bonding ?

你讀中幾？
如果學埋microscopic world II果課 學左electronegativity同polar bond 應該會識解
NH4+同NO3-就純粹cation anion兩個走埋一齊有electrostatic attraction (ionic bond)
HCl同H2SO4就covalent bond only靠atom之間sharing electrons互相吸引

讀哂了 啲野撈亂哂先唔通
除左背，有無方法理解幾時non metal出ionic幾時出covalent?

明你講咩 但都係唔明點解佢地唔一樣bonding
NH4NO3
HCl
H2SO4
大家嘅behaviour差唔多但係唔同bonding ?

你讀中幾？
如果學埋microscopic world II果課 學左electronegativity同polar bond 應該會識解
NH4+同NO3-就純粹cation anion兩個走埋一齊有electrostatic attraction (ionic bond)
HCl同H2SO4就covalent bond only靠atom之間sharing electrons互相吸引

讀哂了 啲野撈亂哂先唔通
除左背，有無方法理解幾時non metal出ionic幾時出covalent?

同埋又可唔可以講下carbocation係ion定covalent 都係會deionise in water

明你講咩 但都係唔明點解佢地唔一樣bonding
NH4NO3
HCl
H2SO4
大家嘅behaviour差唔多但係唔同bonding ?

你讀中幾？
如果學埋microscopic world II果課 學左electronegativity同polar bond 應該會識解
NH4+同NO3-就純粹cation anion兩個走埋一齊有electrostatic attraction (ionic bond)
HCl同H2SO4就covalent bond only靠atom之間sharing electrons互相吸引

讀哂了 啲野撈亂哂先唔通
除左背，有無方法理解幾時non metal出ionic幾時出covalent?

general黎講都真係得NH4+呢個case係common既non metal cation

明你講咩 但都係唔明點解佢地唔一樣bonding
NH4NO3
HCl
H2SO4
大家嘅behaviour差唔多但係唔同bonding ?

你讀中幾？
如果學埋microscopic world II果課 學左electronegativity同polar bond 應該會識解
NH4+同NO3-就純粹cation anion兩個走埋一齊有electrostatic attraction (ionic bond)
HCl同H2SO4就covalent bond only靠atom之間sharing electrons互相吸引

讀哂了 啲野撈亂哂先唔通
除左背，有無方法理解幾時non metal出ionic幾時出covalent?

同埋又可唔可以講下carbocation係ion定covalent 都係會deionise in water

carbocation要睇佢未變cation前係乜野先
正路都係covalent黎
當然你反應後比粒anion佢痴埋出黎果個就ionic compound

可唔可以講多小小ionic 同covalent bond分別係咩
D人話Al2O3係semi covalent 又點解嘅？