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Centrale Mentoring | Serangoon Tuition Center

Centrale Mentoring | Serangoon Tuition Center

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O Level Chemistry

Experimental Chemistry

In general, how do we know which methods (Crystalisation or Evaporation to dryness) to obtain the pure crystal of a salt?

Joey Chue January 26, 2015January 26, 2015 O Level Chemistry 25 Comments Read more

Bond Energy

Water gas, a mixture of Carbon Monoxide and Hydrogen, is prepared by passing Steam over heated Carbon. Energy is absorbed during the process. i) Is the process Endothermic or Exothermic? ii) Construct a balanced equation for this reaction. iii) Calculate

Joey Chue January 26, 2015 A Level Chemistry, O Level Chemistry 37 Comments Read more

Bases

Phosphorus and nitrogen are both in Group V of the Periodic Table. Which ions are produced when phosphine, PH3, dissolves in water?

Joey Chue January 26, 2015 O Level Chemistry 33 Comments Read more

Diffusion

State the connection between relative molecular mass of a gas & its rate of diffusion

Joey Chue January 26, 2015January 26, 2015 O Level Chemistry 37 Comments Read more

Bond Length

Explain why the bond length of the following compounds is as followed: HF 92pm HCl 127pm HBr 141pm HI 161pm

Joey Chue January 26, 2015January 26, 2015 A Level Chemistry, O Level Chemistry 38 Comments Read more
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  • Covalent Bonding
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