SYLLABUS Cambridge O Level Chemistry 5070 For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations 2011 Contents
Premium Chemistry Oxygen Ionic bond
Pheromones: Chemical Messanger Have you ever wonder how does an insect communicate? Unlike other living organisms‚ insects don’t have the ability to speak and communicate. Some insects may even look like they have eyes but they cannot see through them. So how does these insects communicate with each other? Simple‚ they send chemical signals that can easily be detected by other insects of their own kind. These chemicals are called pheromones. These are some examples of insects that contain and
Free Insect Lepidoptera Life
To identify an unknown sample‚ there were several steps that helped determine the molecular structure and the name of the sample. When Belle #9 (unknown) was given to me‚ it’s physical state and color was recorded on the data sheet. Since the sample was a pure liquid‚ there was no need for distillation. Next‚ a solubility test was given. When one drop of the unknown liquid was added to about 2 mL of water‚ the sample was tested to be soluble due to the dissolubility between the two compounds. By
Premium Acid Chemistry Acetic acid
boar‚ but speculates it might be pork dyed in cabbage. When cucumber salad is served‚ he complains that there’s not enough mange-tout in Yugoslavia. He then spends much of the rest of the meal loudly waiting for his boar. He prefers the sanitized chlorination of a swimming pool to the more unpredictable water falling in a
Premium Marriage Fiction Short story
Chapter 2 The Components of Matter Elements‚ Compounds‚ and Mixtures: An Atomic Overview An element consists of only one kind of atom. An element is one kind of substance – the composition is fixed. Each element is unique because the properties of its atoms are unique. Molecules are structures containing two or more atoms chemically bound together. Diatomic molecules are two-atom molecules such as elemental oxygen. A compound is a type of matter in which two or more different elements are chemically
Premium Atom
Chemistry Essay Butane‚ Butene and all isomers that come with them are considered to be alkanes and alkenes respectively. They differ from each other in the fact that Butane contains only single bonds‚ whereas Butene has both single and one double bond. Regardless of this difference in many situations the two molecules can display similar behaviours. For the purposes of this comparison But-1-ene will be used as ‘Butene’ unless otherwise indicated. But-1-ene is almost identical to the other
Premium Oxygen Gas Chemical bond
One major observation made throughout this experiment was during the steam distillation. As the steam distillation started and the solution in the flask began heating‚ it was clear that too much stopcock grease was used around the glassware. The grease from the connecting ends of the three way connecting tube was melting and seeping into the clove and water solution in the two necked round bottom flask. The solution in the flask was immediately discarded and repeated with clean glassware and a very
Premium Water Chemistry Oxygen
Classification Tests for Hydrocarbons Authors: Goldie Ann Tejada‚ Allain Joseph S. Templo‚ Kristinlyn Trajano‚ Kevin Viray‚ Quennie Yu Group 10‚ 2F-PH‚ Faculty of Pharmacy‚ University of Santo Tomas ABSTRACT The test compounds undergo different physical and chemical tests to differentiate their intrinsic physical properties and chemical properties. Physical state‚ color‚ and odor were noted through simple observation. Miscibility of the test compounds were noted through color change or a warming
Premium Benzene Hydrocarbon Carbon
Environmental Chemistry and Analysis Prof. M.S.Subramanian MODULE 1.5 Advanced Waste Water Treatment Removal Of Suspended Solids Microstraining Coagulation and flocculation Filtration Removal of dissolved solids Ion exchange Reverse osmosis Electrodialysis Removal of nitrogen Phosphate removal (chemical treatment) Phosphate removal (biological treatment) Removal of dissolved organic compounds Adsorption Sludge treatment and disposal Disinfection 1 2 2 3 3 4 6 7 8 9 10 10 10 11 13 Indian
Premium Water Water purification
uncontrollable environmental factors. Introduction An alkyl halide or haloalkane is composed of hydrocarbons with a halogen attached to a sp3-hybridized carbon. It resembles an alkane with a halogen attached to it. Halogens are fluorine‚ chlorine‚ bromine‚ and iodine. Any of these halogens seen to be attached to an alkane‚ could then be identified as alkyl halides. They are generally polar because of the electronegativity difference of carbon (2.5) with the halogen (2.5-4.0). However‚ most alkyl
Premium Chlorine Hydrochloric acid Alkene