Wan Ching Man 5C(21) Effects of temperature on the activity of lipase Aim: To investigate the effects of temperature on the activity of lipase enzyme on milk which contain fats or lipids. Introduction: Enzyme is a kind of biological catalyst that made up of protein. It can speed up the metabolic reactions on various kinds of substances. Like lipase can break down lipid into glycerol or fatty acids in milk. Since enzyme is made up of protein which easily affected by varies temperature. This
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fruit juice beverage was used. 5ml of the fruit juice was measured using measuring cylinder then poured into boiling tube containing 25ml of oxalic acid. Then the solution is titrated with DCPIP solution‚ until the colour change from light orange to light pink. The volume of DCPIP needed to titrate is recorded. Then‚ another 5ml of Tropicana fruit juice and 25ml of oxalic acid prepared in a boiling tube was heated at 80oC for 5 minutes in a hot water bath. The solution is then titrated with DCPIP solution
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experiment shall be carried out via the manometric technique‚ where there are two different environments with differing pressures. Oxygen is taken up by maggots for respiration‚ in one boiling tube‚ producing carbon dioxide‚ which is then absorbed by soda lime. As there are no living organisms in the other boiling tube‚ the atmosphere does not change‚ but there is till soda lime present to remove any carbon dioxide. So pressure in the maggots’ chamber decreases‚ causing air to be drawn into the chamber
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3.1 a) Valence electron: Valence electrons are the electron in the outermost electron shells of an atom. They are generally the electrons involved in chemical reactions and bonding with other atoms. b) Lewis electron: It is a structural demonstration of a molecule where you can use dots to show the position of the electron around the atoms and lines. c) Octet rule: It is referring to the principle that bonded atoms share their eight outer electrons. There rule of the octet is sometimes broken
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Chemical Earth 1. The living and non-living components of the Earth contain mixtures Construct word and balanced formulae equations of chemical reactions as they are encountered 1. Build a word equation Reactants on left‚ Products on right 2. Convert word equation into chemical formula for the reactants and products Using valency rules 3. Balance the equation Adjust coefficients to get equal numbers of each kind of atom on each side 4. Specify the physical state for each species present
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latent heat of vaporisation of water Theory Latent heat of vaporisation is when a liquid is heated enough to start boiling‚ at this point‚ even if the source of heat keeps heating the liquid‚ the liquid’s temperature will not rise any further until all of the liquid is converted to gas. For example‚ if water is boiling in a kettle‚ and the kettle is left on whist the water is boiling‚ the water’s temperature will not exceed 100°C because all the heat energy from the kettle is needed for all of the
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CHEMISTRY 1 (FSC 1114) CHEMICAL BONDING MOKAN A/L VELAN (SCPNG0000019030) SANDEEP SINGH JASPREET SINGH TABLE OF CONTENT Contents IONIC BOND 2 METALLIC BOND 9 The "Sea of Electrons" Theory 14 Conductors‚ Insulators and Semiconductors 16 25 IONIC BOND Ionic bond is formed when electron transferred from a valence shell of an atom to the valence shell of another atom. Ionic bond involves electron transfer across two atoms. The atom which donates the electron is called cation
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Oakland Schools Chemistry Resource Unit Intermolecular Forces Brook R. Kirouac David A. Consiglio‚ Jr. Southfield‐Lathrup High School Southfield Public Schools Bonding: Intermolecular Forces Content Statements: C2.2: Chemical Potential Energy Potential energy is stored whenever work must be done to change the distance between two objects. The attraction between the two objects may be gravitational‚ electrostatic‚ magnetic‚ or strong force. Chemical potential energy is the result
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have. The perfume industry takes advantage of these natural cloves by using their aromatic oils in their products1. One method used to isolate clove oil is steam distillation. This distillation technique requires liquids to be heated to their boiling points and conducted their hot vapors into a cooling device where they condense; this process involves steam mechanically carrying the oils through the distillation process1. Water is used as the liquid that is boiled in the flask containing the
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CHAPTER 5 STATES OF MATTER INTERMOLECULAR FORCES Intermolecular forces are the forces of attraction and repulsion between interacting particles (atoms and molecules). Attractive intermolecular forces are known as van der Waals forces. van der Waals forces include dispersion forces or London forces‚ dipole-dipole forces‚ and dipole-induced dipole forces. A particularly strong type of dipole-dipole interaction is hydrogen bonding. Dispersion Forces or London Forces Observed between non-polar molecules
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