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Pt - platnium can conduct electricity and is inert and will not participate in any reaction If you have an inert electrode, its the same as normal ones Search for the half equation for Ag and Br Ag+ + electrion --> Ag (s) 0.80V 0.5 Br2 (l) + electron --> Br- 1.08V 0.5 Br2 (aq) + electron...

re: HSC Chemistry Marathon Archive um i would describe the general process (IPT - initiation, prop....) then distinguish between LDPE and HDPE by initator molecule, catalyst, and high/low temp&pressure you can also talk about the salt bridge, otherwise, well done

Alright Cr2O2-7 -------------> Cr3+ We need to find the oxidation state of this bad-ass: Cr2O2-7 Oxygen has an oxidation state of -2 This is polyatomic ion, hence oxidation states will ADD up to its CHARGE, in this case, its -7 There are 2 oxygens, hence total sum of the oxygen...

re: HSC Chemistry Marathon Archive bold

re: HSC Chemistry Marathon Archive forget about it, it was to troll

re: HSC Chemistry Marathon Archive Good work for question 1 but u made a small mistake in Q2 (a) which costed u the rest of the question 1 (b) i would say potassium acetate ionises to form acetate ions instead of "which comes out from the KCH3COO when put into water" 2 (a) Lead is more...

re: HSC Chemistry Marathon Archive Question 1: (a) What is a buffer solution? (b) Can a solution comprised of KCH3COO and CH3COOH act as a buffer? Justify your reasoning Question 2: A student decided to construct a galvanic cell to zap himself. One half cell containing copper metal (as an...

re: HSC Chemistry Marathon Archive LOL (d) is definitely wrong I would go for (c)

YOUR AIM IS TO EVALUATE \frac{dy}{dx} \left ( $at $x = 4 \right )) Remember if \frac{dx}{dy} = z then \frac{dy}{dx} = \frac{1}{z}

this guy.............

swearing one lol so close! i thought i got some questions wrong, but i stuffed up MCQ...

Holy ******* **** is all I have to say

Goodluck everyone - i hope its an INSANELY difficult exam

Method 1: RELATIONSHIP BETWEEN ROOTS AND COEFFICIENTS You know 2 roots of the polynomial, x = 1 and x = -2 Let the other 2 roots be A and B Apply sum and product of roots, then solve simultaneously A and B Method 2: LONG DIVISION Long divide polynomial by (x-1)(x+2) = x2 + x - 2 Write...

re: HSC Chemistry Marathon Archive

Re: HSC 2013 3U Marathon Thread omg...................................

Fitzpatrick

Re: HSC 2013 3U Marathon Thread $Evaluate this limit: $\lim_{x \rightarrow0} \frac{\sin4x}{sinx} $ by expanding the numerator or \underline{otherwise}

yeh i hope its hard this year - hoping for a very nice projectile motion question

LOL!