Chemistry with Mr Ten（化学导师）

👋🏻 嗨 同学们，Chemistry with Mr Ten 从今天开始为了回馈福利给更多学生，会在以下时间开放
*免费！免费！免费*教学

你们可以通过以下 link 预约询问一切关于化学的问题（可以准备问题，或让我知道哪个 chapter etc）
https://calendly.com/ten10yf/chem-mentoring

每个星期二 8-10pm （每次预约 45分钟）
每个星期三 8-10pm （每次预约 45分钟）

*预约空档虽然是先到先得，可是同学们如果看到预约满了可以让我知道，只要不介意我可以把链接也寄给你们。

旨在教你们珍贵的...
💡 MrTen 拿 A 作答技巧 💡
🧠 MrTen 轻松理解与背书法 🧠
🎉 考试的相关问题 🎉

===============================================
有需要帮助的同学能看以下 👇👇👇
[👨‍🔬 Free online mentoring/tuition] - https://calendly.com/ten10yf/chem-mentoring

[💬 WHATSAPP] - https://wa.link/v7ge30
[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

Chemistry with Mr Ten - YouTube 👨‍🔬Hello, I am a Chemistry enthusiast experienced in tutoring SPM, IGCSE, A-level and IB students.I have proven records with guiding more than 70% students...

我们终于来到了久违的...

Salt preparation! 🤩🤩🤩
salt preparation 真的只是死背？还是怎么去理解？🧐🧐🧐
今天就教你怎么准备这一课！😎😎😎

影片旨在教你们珍贵的...
💡 MrTen 拿 A 作答技巧 💡
🧠 MrTen 轻松理解与背书法 🧠
🎉 考试的相关问题 🎉

***【Acids & Bases (Salt Preparation)】***
中文: https://youtu.be/h23laMgIRVY

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇
[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18

[💬 WHATSAPP] - https://wa.link/v7ge30

[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

中文SPM KSSM 化学 中4 第6课 Chemistry Form 4 Chapter 6 Bab 6 [6.3 Acid & Bases - Salt Preparation] #MrTen SPM Form 4 Chapter 6.3 Acid & Bases - Salt Preparation 中文解说 -level : https://forms.gle/eShN6C6Tg1FEqEt18*************...

今天我们来看看考试能如何问关于 acid bases 的 reaction 的问题？他们又能如何挖坑给你们跳？🤯

明白了题目，那有需要如何回答才能拿分？
题目来自： https://youtu.be/D6D-Qs9jRjg
================================================
Q1
首先你们必须要熟悉 acid 和 base 的各个 reactions！这一题是关于 base + metal carbonate (metal salt)，是一个 displacement reaction

Ans: 2 KOH + Na2CO3 -> K2CO3 + 2 NaOH
(Unlike acid, when KOH (the alkali/base) reacts with Na2CO3, it is a displacement reaction.)

Q2
Ans:
NO. because ONLY acid reacts with metal carbonate to give salt+CO2+H2O.
When base/alkali reacts with metal carbonate, it is a displacement reaction?

Q3
切记！只要题目要求你们改变 concentration，通常都会是 dilution reaction，把 concentration 从 很浓 变 比较稀，你要应用一下这个 equation
M1V1 = M2V2
而 V 指的是容器里面 总共 的液体！

Ans:
M1V1 = M2V2
(3.0 mol/dm3) x (20 cm3) = (1.0 mol/dm3) x V2
V2 = 60cm3

However, remember 60cm3 is the TOTAL VOLUME, hence the water added is 60 - 20 cm3 (originally present) = 40 cm3

Water added = 40cm3

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18

[💬 WHATSAPP] - https://wa.link/v7ge30

[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

这一次的视频我们还是在 Acid and bases! 不过我会让你们知道...

acid 和 base 究竟如何与其它 compounds react 🤩🤩🤩
到底有什么东西学生经常混淆 🧐🧐🧐
还有很多人不知道关于 concentration 算法的重点！😎😎😎

影片旨在教你们珍贵的...
💡 MrTen 拿 A 作答技巧 💡
🧠 MrTen 轻松理解与背书法 🧠
🎉 考试的相关问题 🎉

***【Acids & Bases (Chemical reactions & Concentration)】***
中文: https://youtu.be/D6D-Qs9jRjg

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18

[💬 WHATSAPP] - https://wa.link/v7ge30

[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

中文SPM KSSM 化学 中4 第6课 Chemistry Form 4 Chapter 6 Bab 6 [6.2 Acid & Bases - Reactions] #MrTen SPM Form 4 Chapter 6.2 Acid & Bases - Reactions & Concentrations 中文解说 -level : https://forms.gle/eShN6C6Tg1FEqEt18***...

今天我们来看看 考试能怎么问关于 acid and bases 和 pH 的问题？🤯

明白了题目，那有需要如何回答才能拿分？
题目来自： https://youtu.be/04u_BjVcrHo
================================================
Q1
对于这一课，你们必须理解 acid 和 base 的 definition

Ans: A base can be an insoluble or soluble base, which the soluble base is known as alkali.
(The example of alkalis are SPA - Sodium hydroxide, Potassium hydroxide, Ammonium hydroxide)

Q2
对于这一点，你必须明白 strong 和 weak acid 存粹告诉你的是他们在水里面的状态。pH 的高低是完全取决于 H+ 的浓度！

Ans: This statement is wrong because pH is solely depending on the concentration of H+. There might be cases where you have very low concentration of strong acid and high concentration of weak acid!

Q3
（题目有更正，是 0.1 mol/dm3 的 H2SO4）
首先你们必须明白 H2SO4 会怎么分解，才能知道 H+ 的 concentration

Ans:
H2SO4 -> 2 H+ + SO4^2-
0.1 mol/dm3 H2SO4 will produce 2 x 0.1 mol/dm3 of H+

[H+] = 0.2 mol/dm3

pH = - lg[H+]
pH = - lg (0.2)
pH = 0.70

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18

[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30

[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

历经千辛万苦，今天终于来到了很多学生要求的...

Acid and bases!

这支影片就让你知道 Acid 和 bases 的重点 🤩🤩🤩
去真正理解 pH 🧐🧐🧐
还有很多人不知道的... pH 与 strength 真正的关系！😎😎😎

影片旨在教你们珍贵的...
💡 MrTen 拿 A 作答技巧 💡
🧠 MrTen 轻松理解与背书法 🧠
🎉 考试的相关问题 🎉

***【Acids & Bases (pH & Strength of acid and base)】***
中文: https://youtu.be/04u_BjVcrHo

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18
[💬 WHATSAPP] - https://wa.link/v7ge30

[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

中文SPM KSSM 化学 中4 第6课 Chemistry Form 4 Chapter 6 Bab 6 [6.1 Acid & Bases - pH & Strength ] #MrTen SPM Form 4 Chapter 6.1 Periodicity - Group 1 & Group 17 中文解说 -level : https://forms.gle/eShN6C6Tg1FEqEt18************...

今天我们来看看 考试能怎么问关于 Period 3 compounds 和 transition metals 的问题？🤯
明白了题目，那有需要如何回答才能拿分？

题目来自： https://youtu.be/FlnBbXdOJUM
================================================
Q1 关于这道题目，你们必须记得因为是同个period，他们都有相同数目的 shell，可是 proton number 不一样，所以 force of attraction 也会随着 proton number 而改变，从而影响 size

Ans: Across the period, atomic size decreases [1]. Although period 3 elements have the same number of shells [2], but there is an increase in proton number across the period [3], which means force of attraction from proton to valence electrons increase across the period [4]. Hence, the atomic size decreases across the period.

Q2 关于 melting/boiling point，我们必须搞清楚 period 3 oxides 的 bond！

Ans: Across the period, the melting/boiling point increase from Na2O to Al2O3 because they are ionic compounds [1] which are bonded by strong electrostatic forces [2]. The melting/boiling point then increase drastically for SiO2 as SiO2 is giant covalent [3] which is bonded by strong covalent bond [4]. From group 5 onwards, melting/boiling point drops abruptly as they are the simple covalent compounds [5] which are bonded by weak intermolecular forces [6].

Q3 这题其实很简单，只需要背起来视频提到的 4 个 properties！

Ans: The 4 chemical properties of transition metals are...
They can form coloured compounds [1]
They have more than one oxidation numbers [2]
They can be used as catalyst [3]
They can form complex ions [4]

Q4 对于这一题，我们必须清楚知道 transition metals 和 group 1 metals 的 physical properties

Ans: Group 1 metals usually have low density [1] and low melting/boiling points [2].
While transition metals have high density [3] and high melting/boiling points [4].

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18

[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30

[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

大家好，今天终于来到 SPM Form 4 第5课的最后一支影片了！这次我会让你们知道...

Period 3 和 Transition Metals 到底要怎么背?? 😵‍💫😵‍💫😵‍💫
还是有什么重点又是你要懂的？😵‍💫😵‍💫😵‍💫

如果我说其实这些都是有方式能记得？🤯🤯🤯
而且还能让你更加理解之前学的东西！🤩🤩🤩

这一期我们就好好认识 periodicity 里 Period 3 和 Transition Metals 的重点，也教你们珍贵的...
💡 MrTen 作答技巧 💡
🧠 MrTen 背书法 🧠
🎉 考试的相关问题 🎉

***【Periodicity (Period 3 & Transition Metals)】***
中文: https://youtu.be/FlnBbXdOJUM
===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇
Online bilingual (English & Mandarin) lesson and free notes/free QnA below 👇👇👇
[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18
[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30
[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

中文SPM KSSM 化学 中4 第5课 Chemistry Form 4 Chapter 5 Bab 5 [5.3 Period 3 & Transition Metal] #MrTen SPM Form 4 Chapter 5.2 Periodicity - Group 1 & Group 17 中文解说 -level : https://forms.gle/eShN6C6Tg1FEqEt18************...

Periodicity 里会有什么关于 Group 1 和 17 的问题？🤯
如果需要，考试又会如何刁难你的理解能力呢？😰

题目来自： https://youtu.be/zb8BjCDaMP8
================================================
Q1
首先，你们必须知道 Group 17 的 chemical properties。当 Halogen (X2) react with water，你会得到这个 reaction：
X2 + H2O -> HX + HOX

Ans:
When Br2 dissolves in water, the chemical reaction is:
Br2 + H2O -> HBr + HOBr
When tested with blue litmus paper, the colour will remain as blue and decolourise after that.

Q2
在这里，你必须知道每个 group 往下走，他的size 都会变大，proton 和 electron 之间的 force of attraction 一定是跌的。之后就取决于 group 1 和 17 需要 拿 还是 丢 electron 了

Ans:
When going down Group 1, the atomic size increases [1], which means the force of attraction from proton on the valence electrons will decrease [2]. Hence, when going down the group, it will be easier for Group 1 element to donate their valence electron [3], and the reactivity increases [4].

When going down Group 17, the atomic size increases [5], which means the force of attraction from proton on the valence electrons will decrease [6]. Hence, when going down the group, it will be more difficult for Group 17 halogens to gain electron into their valence shell [7], and the reactivity decreases [8].

Q3
这个问题其实要知道的是，melting boiling points 需要使用 bonding 来做解释。metal 的 bond 就是 metallic bond！

Ans:
Metals are bonded by metallic bond [1], which the layers of cations are surrounded by the sea of delocalised electrons [2]. When going down the group (from period 2 to period 5), size of cations increase [3], which means the the force of attraction between the proton and delocalised electrons decrease [4]. Hence, for metal in the same group, the melting point of a period 5 metal will be lower than a period 2 metal [5].

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18
[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30
[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

大家好，新的影片来了！SPM Form 4 第5课的...
Group 1 和 17 好像很多重点? 😵‍💫
到底要怎么读?? 🤯
考试会怎么问??? 😰

这一期我们就好好认识 periodicity 里的 Group 1 和 17 的重点，影片的结尾也附送了珍贵的...

💡 MrTen 作答技巧 💡
🧠 MrTen 背书法 🧠
🎉 考试的相关问题 🎉

***【Periodicity (Group 1 & 17)】***
中文: https://youtu.be/zb8BjCDaMP8

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇
Online bilingual (English & Mandarin) lesson and free notes/free QnA below 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18
[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30
[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

中文SPM KSSM 化学 中4 第5课 Chemistry Form 4 Chapter 5 Bab 5 [5.2 Periodicity - Group 1 & Group 17] #MrTen SPM Form 4 Chapter 5.2 Periodicity - Group 1 & Group 17 中文解说 -level : https://forms.gle/eShN6C6Tg1FEqEt18************...

究竟 Periodicity 关于 Group 18 有什么重点？
考试会怎么问？？？

题目来自：https://youtu.be/jwJ91fD7kSE
================================================
Q1
首先，重复之前教过的，只要是解释 melting/boiling point，你就必须使用 bonding 来解释！
这个情况需要理解 group 18 是 non-metal

Ans:
Group 18 noble gases are non-metal. Hence they are bonded by weak Van der Waals forces.

When going down group 18, as size increases [1], the surface area in contact between the atoms increase [2]. Hence, the weak Van der Waals forces between the atoms will increase [3], resulting in an increase in melting/boiling point [4]

Q2
在这里，你必须知道 group 18 compound 是 noble gas，是不 reactive 的！

Ans: Ne is from Group 18, and it has a full octet structure [1] which means it is stable and will not share / donate / gain electrons [2]. Hence Ne will not react with Na. [3]

===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18

[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30
[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

大家好，新的影片来了！SPM Form 4 第5课开头的...
6 位伟人，贡献是什么？最主要名字怎么背？🤯
考试怎么拿分??? 😰

这一期我们就好好认识 periodicity 里的人物和 Group 18 的重点，我也会在这支影片的结尾附送珍贵的...
💡MrTen 作答技巧💡
🧠MrTen 背书法🧠
🎉考试可能会问的相关问题 🎉

***【Periodicity (Intro & Group 18)】***
中文: https://youtu.be/jwJ91fD7kSE
===============================================
有兴趣上线上补习班的同学能看以下 👇👇👇
Online bilingual (English & Mandarin) lesson and free notes/free QnA below 👇👇👇

[👨‍🔬 Google form for online lessons] - https://forms.gle/eShN6C6Tg1FEqEt18
[💬 WHATSAPP to get free notes!] - https://wa.link/v7ge30
[📘 FACEBOOK] - https://www.facebook.com/Chemistry.with.MrTen/
[📷 INSTAGRAM] - https://www.instagram.com/chemistry.with.mrten/
[📺 YOUTUBE] - https://www.youtube.com/channel/UCLegXvkspKdlZ9DahKIFrfA

中文SPM KSSM 化学 中4 第5课 Chemistry Form 4 Chapter 5 Bab 5 [5.1 Periodicity - Intro & Group 18] #MrTen SPM Form 4 Chapter 5.1 Periodicity Intro & Group 18 中文解说 -level : https://forms.gle/eShN6C6Tg1FEqEt18****************...