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Recent content by Jia Yean
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AS Level Chem Practical Paper 35
May I know what do you mean by that? Is this part of qualitative analysis? I'm a bit confused :confused: -
Statistics P6 : post your doubts here!
Standard deviation = [499.2/15 - (72/15)^2 ]^1/2 = 3.2 Mean = 104.8 Σ(x − 104.8)/15 + 104.8 = 104.8 Σ(x − 104.8) = 0. Since std deviation is always the same, Std dev = 3.2 [Σ(x − 104.8)^2 /15 - (0/15)^2]^1/2 = 3.2 Σ(x − 104.8)^2 = 153.6 :) -
AS Level Chem Practical Paper 35
Hino : I have never come across hydrogen peroxide in the qualitative analysis of CIE AS Level so far. I only remember using it when testing for some sort of rate of reaction experiment. :( -
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AS Level Chem Practical Paper 35
Hi there!! I'm having Chemistry practical exam (Paper 3) on the 25th of October. Are there any tips or special techniques that can be shared? I have a question though..- Regarding the "maximum error". For each burette reading, max error = 0.05 cm3 (half the smallest division) Thus, overall... -
May/June 2012 Question Papers + Marking Schemes + Examiner Reports + Grade Thresholds
I am unable to open the link for the examiners report for A and AS level. :S- Jia Yean
- Post #212
- Forum: Announcements