Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina IB Chemistry SL 11 Mr. Eastwood Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina Introduction: Hydrogen peroxide is a clear and colourless substance that has a strong oxidizing characteristic. From the books‚ “Hydrogen Peroxide: Medical Miracle”[1995] by Douglass and “Applications of hydrogen peroxide
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Optic nerve sheath diameter (ONSD) The anatomy of the optic nerve sheath : The intraorbital section of the optic nerve extends from the globe‚ where it inserts medially‚ to the optic canal located in the lesser wing of the sphenoid bone. It is encased by a meningeal sheath consisting of dura mater‚ arachnoid mater and pia mater. Cerebrospinal fluid is contained in the trabeculated subarachnoid space and is continuously and slowly filtered. As a result the optic nerve sheath is in direct
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Film 1010 20 April 2011 Taken (2008) Taken is a great thriller movie with many action scenes with great editing; it is educational‚ emotional and highly controversial. The movie is about Kim‚ a girl that is kidnapped by Albanian sex trade gang. When the movie starts the girl lives with her mother and step father in Los Angeles. Her real father‚ Brian is a retired CIA agent. The girl and her friend are planning to go on a vacation to spend the summer in France‚ which leads to a lot of drama
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"Manifest Destiny" is a phrase that expressed the belief that the United States had a divinely inspired mission to expand‚ spreading its form of democracy and freedom.The phrase "Manifest Destiny" was first used primarily by Jackson Democrats in the 1840s to promote the annexation of much of what is now the Western United States (the Oregon Territory‚ the Texas Annexation‚ and the Mexican Cession). Slavery‚ the exploitation of Africans for hard labor‚ was also growing vastly in popularity during
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is which type of temperature change will result from heating ice to liquid‚ then boil (steam)? What will happen to the water after the boil? I hypothesise the water heats ice to liquid and then goes to simmer and boil. The independent variable is the hot plate changed to a burner itself. The dependent variable is what we are measuring is the time. The steps in the lab were to first start off with a burner‚ ice and water in a beaker‚ then record time and water temperature. Also‚ some phase
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micromolecules to allow nutritional absorption. All digestive Enzymes are Hydrolytic‚ i.e.‚ a water molecule is added to allow compound molecular breakdown and separation. All Enzymes have a unique shape to their ‘active site’ allowing only the target substrate to bond for biological processing. Enzymes have optimum operating requirements and can denature if the temperature becomes too warm or the environment too acidic or alkaline. Digestive Enzyme secretion is regulated by both the nervous and the hormonal
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Firstly‚ the breakdown of social order was instigated by the leadership of Nicholas II. The Tsars’ archaic policy’s led to the persecution of racial minorities and oppression of the working class‚ which held Russia’s population majority and contributed to over half the nations’ income. Nicolas II was very easily influenced‚ which led to him being easily persuaded by his advisors and wife. His wife‚ Tsarina Alexander was a very strong believer of the autocratic system and believed that power should
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Investigate temperature change during a neutralization reaction Introduction: When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH-(aq)) from the alkali‚ forming water. For hydrochloric acid and sodium hydroxide: H+(aq) + Cl-(aq) + Na+(aq) + OH-(aq) → Na+(aq) + Cl-(aq) + H2O(l) Hydrochloric acid Hydrochloric acid Sodium Chloride Sodium Chloride Sodium Hydroxide Sodium Hydroxide Neutralization
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Practical Assessment 2 – The effect of substrate concentration on the rate of enzyme activity of Catalase Aim To investigate the effect of substrate concentration (manipulated by increasing concentration of hydrogen peroxide) on the rate of enzyme activity of catalase‚ produced by liver cells‚ on the decomposition of hydrogen peroxide. Introduction Enzymes are biological catalysts that increase the rates of reactions. In an enzyme-catalyzed reaction‚ the substrate binds to the active site
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Investigation Aim: The aim of the investigation was to investigate the effect of substrate concentration Hydrogen Peroxide H O (in %) on the rate of reaction of the enzyme catalase (in 1/mean time). Prediction: As the substrate concentration (hydrogen peroxide) in % increases the rate of reaction in 1/mean rate increases until the solution becomes saturated with the substrate hydrogen peroxide. When this saturation point is reached‚ then adding extra substrate will make no difference. The
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