D.I.Y but I'll teach the concept.

1)Find the number of mole of the acid by using mv/1000.
2)Find the number of H⁺ ion by using (the number of hydrogen atom in the acid x number of mole of acid).
3)The highest number of hydrogen ion is the highest concentration.

P/s:
Number of hydrogen atom in the acid can be obtained in their formula.
Eg: H₂SO₄ has 2 hydrogen atoms.

oh..i know to do tis type of question d..so every ques just follow the steps?

when u read,u try understand them..let say ticker tape,i dun memorize them..i only use logic n concept when calculating ticker tape....u ask me now,i sure duno...

Shouldn't the position of 3 & 4 in the diagram reverse? Cuz sin = o/h

What symbol do u mean ?@@

My bad, you're right.

Check your diagram for number 4.

U mean the symbol as + - x divide?

Or the solution. Find theta

The question is like this lol


(1/2) cos^2 2x sec x cosec x - sin2x = 1

I think is times.

no put things means times

This post has been edited by macamtakada: Oct 27 2008, 05:09 PM

seriously, to get rid of confusion, next time use asterisk to replace the symbol 'times/multiply'

Asterisk is this right? : *********

And if that's the one, some people use it for degrees...

Happy Deepavali

This post has been edited by Jojos: Oct 27 2008, 08:29 PM

walaoe..post at here for what.

Few days until November, 400+ pages of sejarah to go

Ujian Daya Tahan Asas ( UDTA) bertujuan untuk mengukur tahap kecergasan pelajar sekolah. Antara aktiviti dalam ujian tersebut ialah
I Bangkit Tubi
II Tekan tubi
III Jangkauan melunjur
IV lari 1500 meter

which?
is it all?

This post has been edited by vick5821: Oct 27 2008, 08:43 PM

Why suddenly ask PJK here?

hehe..cox i cant find in teks book ma

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Added on October 27, 2008, 8:46 pm
work_tgr..u sure for the statement? i thought weak acid the pH would not less than 2 de..always greater than 2? correct?

This post has been edited by vick5821: Oct 27 2008, 08:46 PM

Forgot everything about PJK. In fact, I never remember anything about PJK except general knowledge.

@macamtakada

4)
(1/2)(cos² 2x)(1/cos x)(1/sin x) - sin 2x = 1
[(1-sin² 2x) - 2(sin x cos x)(2sin x cos x)]/(sin x cos x) = 2
1-sin² 2x - sin² 2x = 2sin x cos x
0=2sin² 2x + sin 2x - 1
sin 2x = 0.5,-1
2x = 30, 250, 390, 510, 270 ,450
x = 15, 75, 195, 255, 135 ,225

I can't find the red ones.

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PJK is not in SPM.
Perhaps you have to ask in another thread.
I'm sure no people will care bout it.

This post has been edited by HotChocolate: Oct 27 2008, 10:59 PM

1 and 2 .

III and IV no?? but we got ujian that wor..

This post has been edited by vick5821: Oct 28 2008, 07:38 AM

Last time is all...

This year our school did step up & down the bench to replace 1500 meter run. Dunno whether issit new thing from Kementerian.
I am very curious to know where u bought the PJK revision book......
You are the 1st to do PJK.... the usual things happen in PJK exam is question not yet come but the objective answer sheet is already shaded.

A normal student can do how many times tekan tubi????

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Added on October 28, 2008, 8:19 amSwimming is voluntary action right?

How about a person cannot swim but suddenly can swim when he/she is going to drown?


Cycling & keeping balance is voluntary or involuntary action?

This post has been edited by macamtakada: Oct 28 2008, 08:19 AM

tis paper is last year paper and berkemungkinan my tomorrow PJK exam will use the paper from JPN