O-Level Chemistry

[leeh40]

Hello Uptas,


Thank you for your patience in answering my question. So, the presence of impurities weakens the lattice, making it less stable. As a result, the compound melts at a lower temperature..now I get it! Thank you so much!👍

[chaocheng12]

Hello,


How does paper chromatography works in separating mixture of solutes in a solution?

[change146]

chaocheng12\" post_id=\"1978999\" time=\"1591014513\" user_id=\"185205:

Hello,

How does paper chromatography works in separating mixture of solutes in a solution?

I think it is measured through the different speeds of different solutes travelling on the paper. It has different speeds so eventually they are separated..

[change146]

Thank you for answer.

[rycho12]

Hi,


Need your advice. I’m weak in chemical calculations. Any tips on how to improve?

[cysean009]

rycho12\" post_id=\"1979847\" time=\"1591506037\" user_id=\"186020:

Hi,

Need your advice. I'm weak in chemical calculations. Any tips on how to improve?

Perhaps part of the tips would be to master chemical formulas and balancing of chemical reactions since those are essential factors in chemical calculations.

[Anqi]

i have o level pure chemistry notes for sale, got me really good grades during my prelims, i just took my o level this year

[chippuryl]

Hello parents/students, I’m an ex-Hwa Chong Junior College and Nanyang Girl’s High school student looking to tutor secondary school and JC students. I’m currently offering 1-1 O-Level/IP chemistry tuition via Skype/Zoom at $25/h. Do reach out to me for my credentials (school awards, experience etc) if interested. Thank you!

[miraclemummy]

Hi, does anyone has good chemistry tutor or tuition centre to recommend for sec3 IP chemistry?

[mummyof3angels]

miraclemummy\" post_id=\"2022509\" time=\"1620119418\" user_id=\"47502:

Hi, does anyone has good chemistry tutor or tuition centre to recommend for sec3 IP chemistry?

If you are in the central area, I would recommend --

(1) Making Sense Chemistry at Marymount CC

(2) Julian Chemistry at Bishan

(3) Ms Chen Science at Ang Mo Kio