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yep, its easier if u draw a graph for (ii)

the first one u can dy/dx both side and sub in Y,X value to find dy/dx other questions just simply differentiate and sub in the correspond value

yes, you definitely can

i guess they are the same they both ionise 100%

Same was watching titration on YouTube..

Ok..i found my notes on Stong/Weak acid or base Common Stong acids: hydrocholoric acid sulfuric acid nitric acid Weak acids (decreasing order of acid strength) : oxalic acid hydrogensulfate ion phosphoric acid hydrofluoric acid ethanoic acid carbonic acid hydrogen sulfide dihydrogenphosphate...

Strong acids are: HCl, H2SO4, HNO3 Any acids other than those are Weak acid H3PO4 is said to be triprotic although it is Weak acid Indicator: Stong acid + Stong base <---Use bromothymol blue Stong acid + Weak base <---Use methyl orange Weak acid + Stong base <---Use phenolphthalein

Can anyone plz send me a copy of their notes for The China Coin..Thanks! dongerluo@hotmail.com

for Q8 part c i wrote t=2kpi/n where k=0,1,2,... i think it make sense :(

i got exactly the same thing! ^@^