Chemical Forums
Specialty Chemistry Forums => Chemical Education and Careers => Topic started by: wakka on May 01, 2006, 09:15:27 PM
-
Hey i'm having a lot of trouble learning chemistry, i'm really just getting into it. can someone tell me what types of stuff i should have memorized and know fairly well to be able to understand the concepts? much appreciated.
-
Memorise the first twenty elements of the periodic table :)
-
done!
-
Memorise the formulae:
n = m/M
n = c x v
PV = nRT
C1V1 = C2V2
-
that's the kind of s#*$ i'm talking about.. what do those formulas relate too though?
-
Start by studying concepts concernings atoms, molecules, atomic mass units, moles, etc. Then ofcourse you ought to be familiar with certain definitions which are all provided in any general chemistry book. There are too many pigeon holes to cover in Chemistry, and memorizing the entire periodic table or about a hundred equations won't do. The best way to learn Chemistry is to understand , not memorize.
-
Refering to the equations I wrote before:
n = number of moles
m = mass
M = molecular weight
c = concentration
v = volume
P = pressure
R = gas constant
T = temperature
High school and early undergrad students will use these equations all the time so they are worth memorising.
The best way to learn Chemistry is to understand , not memorize.
I always thought the best way to learn was, to do.
-
i never used those mole/mass, concentration/volume and mole/concentration formulas; IMHO those involve simple logical reasoning like how many apples per person will A and B have if A shares all his apples with B, who has none (dilution)
-
I always thought the best way to learn was, to do.
do what? applications? sure your right, but understanding the concept comes 1st.
i never used those mole/mass, concentration/volume and mole/concentration formulas; IMHO those involve simple logical reasoning like how many apples per person will A and B have if A shares all his apples with B, who has none (dilution)
That's what I'm talking about! understanding the meaning of molar masses + a bit of proportionality is the key here. Instead of memorizing formulas like
n = m/M = N/No or u = m / No , students should understand them, know how to get such relations.
-
Understand valence electrons and electron configuration notation. Stoichiometry is helpful. Make sure you understand chemical formulas and the basic mechanics of a reaction. Knowing that kind of stuff and being able to right out a balanced molecular equation can help you understand what your doing with experiments and what's going on.
Lewis Dot structures may be helpful to understand. Start from the ground up. What you learn in a class look up outside of school, and if you have the means try it. Be smart and safe though. Don't try to synthesise something nitroglycerin when you've never done an experiment before.
-
Vant_hoff and xiankai thanks for those useful educational tips ::)
The post specifically asks for what they should memorise and that is what I responded with.
i never used those mole/mass, concentration/volume and mole/concentration formulas;
I don't believe you! How did you ever work out concentrations, number of moles etc etc, or are you just bragging?
You two must have memorised somethings in your life, why can't you just post that? And it is all well and good to say that "the best way to learn is to understand" that sounds all very new age and hand wavish but doesn't always work like that for all students. It is frustrating when scientists are so vague about what students should learn, for example saying that students should leave a laboratory course "understing the scientific method" what does that mean to a student?
Memorising things has its place!
-
well in place of those formulas, i tried to recall definitions; i guess that could be counted as memorising :P
i remembered my first year taking chemistry in grade 9, it was so hardddd all those stuff about moles, i nearly failed my tests
but as time progressed, i got more familar with it, and it became second nature to me :D
-
The post specifically asks for what they should memorise and that is what I responded with.
You're right , but my point was that whenever students encounter difficulties in Chemistry, memorizing won't help. It's the concept which they fail to understand or perhaps misunderstand.
You two must have memorised somethings in your life, why can't you just post that?
Are you kidding me? Ofcourse I have ( I hope you're happy now :P ) . I think we all memorize equations that are difficult/time consuming to derive, add to that the definitions and chemical names, etc. There's nothing wrong with doing a bit of memorization when needed ...
-
I owned in chemistry in 9th grade. I got all A's on my tests and taught people who were utterly lost. My teacher was a wicked good teacher, but he had heart problems and we would have subs/other chemistry teachers for like 3 or 4 days sometimes and this really messed some kids up.
Sometimes people don't understand something when taught one way. Different analogies can help different people understand. Memorizing has it's place also, but for some people it's hard to memorize things that they can't relate to or use periodically. It is for me. I hate english classes because they are just utterly pointless and bore me to sleep (I've slept through so many english classes).
A terrible teacher = confused kids, decent teachers = kids who understand for the test but then forget it, good teachers = kids who understand things fully and can remember the concept. Atleast that's my generalization of my observations with people.
Best of luck in your education of chemistry. Some parts of chemistry are boring, but are needed and become easier and less annoying with time and practical uses. This site has many people who are respectable and competant.
-
The most important thing you can do for learning chemistry, and for life itself, is to be able to think analytically. When you're looking at an equation, try and figure out why certain things are happening. Why does sodium form Na+ and Mg forms Mg2+? Always try and look a bit deeper into your problems. When you start getting confused, stop and ask yourself why you are getting confused. Learning a subject is a lot like building a creation out of legos. When you first start out you just see a giant pile of stuff and can't fathom how to turn it into anything else. If you start out simple, you can slowly build more and more complex items. Soon you can put all these complex items together into a masterpiece.
Being able to think analytically and logically comes in handy EVERYWHERE. While I have a degree in forensic chemistry, I work in the field of clinical data management. Being able to think analytically is crucial in my line of work and makes my job MUCH easier. When learning chemistry, just keep things simple and learn to build on the concepts that you've already mastered.
-
Jdurg: this is something that crops up often in my work. Teaching students to think analytically, or scientifically, or think like a scientist/chemist/physicist etc. These are seemingly the ulimate goal of a tertiary degree in chemistry/science. My question to you is: do you feel that you were taught explicitly to think analytically/scientifically from the beginning? or was it something that you learnt over time? did you specifically practice thinking analytically or were you learning this subconciously? and if so at what point did you realise that you were now an analytical thinker?
It is an interesting topic. It is easy for us to say, oh I am a scientist therefore I think analytically or have a deeper understanding of things, or I understand the scientific method, but if you were asked to define this skill very specifically in a way that could be then handed on to a student it becomes more difficult.
Anyway, I am not trying to stir people up I am genuinely interested in peoples opinions on this subject. And when you answer or leave your opinion, do as Jdurg has suggested, stop and think a bit more deeply about the problem/question as I have heard all of the "off the cuff" answers to this problem.
Cheers fellas :)
-
Jdurg: this is something that crops up often in my work. Teaching students to think analytically, or scientifically, or think like a scientist/chemist/physicist etc. These are seemingly the ulimate goal of a tertiary degree in chemistry/science. My question to you is: do you feel that you were taught explicitly to think analytically/scientifically from the beginning? or was it something that you learnt over time? did you specifically practice thinking analytically or were you learning this subconciously? and if so at what point did you realise that you were now an analytical thinker?
It is an interesting topic. It is easy for us to say, oh I am a scientist therefore I think analytically or have a deeper understanding of things, or I understand the scientific method, but if you were asked to define this skill very specifically in a way that could be then handed on to a student it becomes more difficult.
Anyway, I am not trying to stir people up I am genuinely interested in peoples opinions on this subject. And when you answer or leave your opinion, do as Jdurg has suggested, stop and think a bit more deeply about the problem/question as I have heard all of the "off the cuff" answers to this problem.
Cheers fellas :)
I think it's something that has always come naturally to me. For as long as I could remember I tried to understand "why" something happened and not just "how". I also had many teachers who would force me to analyze everything that I was doing. Even if it was a simple question, they would ask me to explain why I came up with the answer. If you can spout off an answer but not explain it, then you haven't learned anything. If you can spout off an answer and also explain it then it shows that you have a deeper understanding and are thinking analytically.
A good example of this is asking someone what is table salt made of and why does it have that formula? The simple response would just be "sodium chloride" or "NaCl". However, that doesn't show a full understanding. My teacher would then force us to explain why it's NaCl and not Na2Cl, or NaCl2, etc. As a result, you'd have to think a bit more deeply about the answer. You'd have to look at the sodium atom/ion and the chlorine atom/ion and investigate it a bit further. You'd then see that sodium is in the first group, and chlorine is in the group directly to the left of the stable noble gases. At this point, you'd see that if sodium gave up two electrons it would be to the left of the noble gases. We all know that the noble gases don't react under typical conditions, so there must be something about them that makes them stable. If sodium gives up one electron, then it will be similar to the noble gases and stable. If chlorine takes an electron it will be similar to the noble gases and stable as well. Therefore, to keep things stable sodium chloride would have to have a formula of NaCl.
It's that type of thinking and understanding which helps you excel in chemistry.
-
Hey i'm having a lot of trouble learning chemistry, i'm really just getting into it. can someone tell me what types of stuff i should have memorized and know fairly well to be able to understand the concepts? much appreciated.
rather than memorize things per-se, i would focus rather on learning the concepts and knowing how to do it. memorize the solubility rules.
-
In reality, you don't need to memorize anything. Any formulas are generally given to you. You need to learn how to think and learn instead of memorize. Remember units if that helps and that will allow you to use the right numbers to cancel units to get the desired answer. You could also memorize the polyatomic ions but those you know by heart with time. Other than that just remember the THINK and work through a problem. If it's done in one step, it could be wrong.
-
I am not a chemist! But, mostly a biologist (biology is a picture where physics and chemisty are its elements). I have learned that the best way to learn is :
1. The urge to learn
2. Form a realistic, starting question in mind - like why is the sky blue (quoting Feynman)
3. Try to 'find' the answer yourself (very important)
4. If not yet got - then ask and listen critically
5. There you begin .. at least you begin
Here, in this particular case I think we should (the experienced chemists) can put certain big headings: And then mention in the subheadings the important stuff to know about it.
Mikey
-
The best way to learn Chemistry is to understand , not memorize.
Exactly. Memorizing will only get you so far.
-
When someone says to you what is table salt, you answer sodium chloride. Like it or not you memorized that piece of information. No where can you divine the answer by logical thinking. Of course and fortunately that knowledge is located in some reference that you can look up. Now, if you are taking a test and have a book that converts all common names to chemical names you can look up the answer. But, you are handicapped by taking an inordinate of time looking up every common name. So, if you memorize the most likely, you are more competitive. The trick is selecting which should be remembered.
When multiplying 10 times 10 we might use logic to derive the answer. But that still relies on memorization of the multiplication tables from 0 to 9. We could add 10 to 10 to 10 to 10 to 10 to 10 to 10 to 10 to 10 to 10 and avoid the memorization of the multiplication tables. I would personally run out of fingers and toes before I got the answer using addition. Again the trick is selecting what one should memorize. At one time, I took the time to memorize the squares of 1 through 25 so as to speed up calculations I needed to do. < tongue in cheek mode on> Now, they allow the riff raff to use calculators. What is this world coming to. < tongue in cheek mode off>
There is a story that Einstein was asked his telephone number and he had to use the phone book to give the answer. When asked why he said he only memorized the important things. I hope he would have memorized 911 for emergencies. But, I would not bet my life on it.
The original poster has a reasonable request. Based on our experience which things do we memorize that made us more efficient and which things do we rely on logic to answer. Not one of you derives all answers solely on logic.
-
billnotgatez: Thankyou! :)
-
billnotgatez: Here's 2 scooby snacks for a fantastic insight into learning..
-
memorise trends on the periodic table. if you know all the periodic trends and why they hold true, you can couple that with a few equations and have a good start into understanding chemistry. Memorization can't replace logic here though, should only aid it.
-
to quote James Clerk Maxwell (1831-1879), at an inaugural lecture given in King's College in 1860.
In this class, I hope you will learn not merely results, or formulae applicable to cases that may possiblt occur in our practice afterwards, but the principles on which those formulae depend, and without with the formulae are mere mental rubbish.
I know that the tendency of the human mind is to do anything rather than think. But mental labour is not thought, and those who have with labour acquired the habit of application, often find it easer to get up a formula than to master a principle.
From: The Man Who Changed Everything : The Life of James Clerk Maxwell (page 91) http://www.amazon.com/gp/product/047086088X/102-6524231-0434536?v=glance&n=283155
-
That is beautiful :'(