Useful mnemonics for Science Exams?

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Catchetat
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Anyone know any useful mnemonics that would be useful for remembering stuff for GCSE Chem or for any science exam? I specially need help on remembering the test for positive ions and stuff... PLEASE. I really need help on it!
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Mustard-man
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The classic OiL RiG...

Oxidation is a loss in electron(s)
Reduction is a gain in electron(s)
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Catchetat
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Yeah I remember that :P .. Can someone please make up a mnemonics for the positive ions test and stuff.. I've got GCSE Science exam soon!! AHH!
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kclives
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not a mnemonic but my teacher taught us this:

The "Pussitive" ions go from the Cation

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Catchetat
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Yea our teacher taught us that and everyone was laughing lol. Anything else useful? I can't remember the stupid negative ion test - you know the silver nitrate solution and the barium chloride.. AHHHHHHHHHHHHHh
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Eau
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(Original post by Catchetat)
Yea our teacher taught us that and everyone was laughing lol. Anything else useful? I can't remember the stupid negative ion test - you know the silver nitrate solution and the barium chloride.. AHHHHHHHHHHHHHh
Yes it could be quite annoying at first. But you have to force yourself to remember these things - for exam's sake.

Silver nitrate used to test halides.

Barium chloride used to test for sulphate. (If you cont. chemistry, you will learn why the ppt. barium sulphate is insoluble.)
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Tes
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(Original post by Eau)
(If you cont. chemistry, you will learn why the ppt. barium sulphate is insoluble.)
Because it feels like it :P No serious why is it insoluble. Do we need to know this!
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Eau
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(Original post by BlakDog)
Because it feels like it :P No serious why is it insoluble. Do we need to know this!
Because it feels like it... lol.

Briefly,

Solution enthalpy = Hydration enthalpy - Lattice enthalpy

In barium sulphate, lattice enthalpy > hydration enthalpy. So solution enthalpy relatively endothermic.
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mkgm1
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I used the very helpful acronym, ACPN - Anode Cathode Positive Negative. :P

Btw, I don't think ACPN stands for anything else - I was just bored while revising GCSE Chemistry and wrote ACPN about a hundred times on a piece of paper. ^_^
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Tes
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(Original post by Eau)
Solution enthalpy = Hydration enthalpy - Lattice enthalpy

In barium sulphate, lattice enthalpy > hydration enthalpy. So solution enthalpy relatively endothermic.
I think i get it but i don't need it yet.
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Wangers
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If you need biology ones - Kinky People Can Often Find Good Sex
- takes the bore off ecology - not much though.
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Sycren
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its maths but anyway...sex on holiday can always happen to our advantage..Trigonometry.

Sin=opp/hyp, Cos=adj/hyp, Tan=opp/adj
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Mario_Party
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Gate X Usually Lets In Most Radiation
Gamma rays, X-rays, Ultraviolet light, visible Light, Infrared, Microwaves, Radio waves
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Magendie
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probaby not helpful but i know of one for the stages of events in prophase I of meiosis
Led Zeplin Punishes Dotty Dogs

Leptotene
Zygotene
Pachytene
Diplotene
Diakinesis

stupid but it works...lol
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fabbo
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stages of mitosis:

Please make another two

prophase
metaphase
anaphase
telophase
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Expression
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(Original post by mkgm1)
I used the very helpful acronym, ACPN - Anode Cathode Positive Negative. :P

Btw, I don't think ACPN stands for anything else - I was just bored while revising GCSE Chemistry and wrote ACPN about a hundred times on a piece of paper. ^_^

Peh, ya see we had a rearrangement of this actually taught to us.

PANIC

Positive Anode Negative Is Cathode.

Easy.
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Expression
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(Original post by kclives)
not a mnemonic but my teacher taught us this:

The "Pussitive" ions go from the Cation


And therefore by the reverse argument:

Cations are Pussitive.

Which is what my Chem teacher taught me so many moons ago.
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haseem
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#18
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#18
Richard - Red
Of - Orange
York - Yellow
Gave - Green
Battle - Blue
In - Indigo
Vain - Violet
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Xtrm2Matt
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#19
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Mitosis: I'm Pat

I: Interphase
M: Metaphase
P: Prophase
A: Anaphase
T: Telophase

I thought it was excellent! I always struggle with the order, and came up with that
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schmuall
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(Original post by Wangers)
If you need biology ones - Kinky People Can Often Find Good Sex
- takes the bore off ecology - not much though.
I wish I'd known that when I was doing biology!
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