place? The explosion Part II: Decomposition of hydrogen peroxide Watch the Video. http://www.youtube.com/watch?v=kLagq1koOUk&feature=related Observations: Describe what happened to the hydrogen peroxide when the manganese dioxide was added It formed water and oxygen Questions and conclusions: 1. The MnO2 was a catalyst and did not get used up in the reaction. Balance the equation‚ if necessary‚ for the breakdown of hydrogen peroxide. H2O2 H2O + O2 2H2O2 -> 2H2O + O2. 2. Classify
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reacts with the hydroxide molecules to form two negative charges‚ or dianion. The dianion then reacts with oxygen to form a 5-aminophtalic acid and nitrogen gas. After‚ the oxygen forms with the hydrogen peroxide and the
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use. None of the chemicals used are classified as radiation‚ flammable or explosive hazards. Some of the chemicals however‚ are classified as toxic. There are three main components of glow sticks that are considered toxic: dibutyl phthalate‚ hydrogen peroxide and pthalic oxalate esters. Dibutyl phthalate is a colorless organic liquid that is used as a plasticizer (additives that make
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Another redox colour change takes place when potassium iodide‚ which is colourless‚ is oxidised by an oxidising agent to form brown iodine solution. An example of this reaction is potassium iodide solution reacting with a solution of hydrogen
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Purpose: The purpose of this lab is to find out which substance‚ alcohol‚ antibacterial soap‚ water‚ or hydrogen peroxide‚ is the best at preventing the growth of bacteria. Hypothesis: Antibacterial soap will be the best because soap is a substance that people use to wash their hands because it takes away the germs. Even the name‚ antibacterial soap‚ suggests that it fights off bacteria. Hydrogen peroxide is second because it is used to kill off cells on wounds and is poisonous. Rubbing alcohol will be
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increasing the kinetic motion of molecules‚ changing the rate of collisions between them and the hydrogen bonds it’s 3D structure(D. Fraser‚ 55). There is a specific temperature for every enzyme where activity is maximized‚ and also where an enzyme becomes denatured. An enzyme becomes denatured when it is heated at extreme temperature; the excessive kinetic movement of the amino acid begins to break the hydrogen bonds holding its 3D structure together‚ typically around 70℃. Another factor that can affect
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mortar & pestle‚ 4 test tubes‚ test tube rack‚ spatula‚ hydrogen peroxide 6%‚ 3%‚ 1.5%‚ pipettes‚ scalpel‚ ruler. Procedure 1. Cut using scalpel several raw potato cubes each measuring 1 cubic centimeter (cc). 2. Each cube was ground with a mortar & pestle and then added to a test tube using a spatula. 3. Test tube 1 was left as the control with no added hydrogen peroxide. 4. Different concentrations of hydrogen peroxide solution were added to each test tube using a pipette. (5mL
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activity using hydrogen peroxide. Hypothesis: My hypothesis for this experiment is that temperatures near body temperature is when enzyme activity will be at its highest. I believe this will occur because in our body‚ enzymes are very efficient. I also think that as the temperature of the water increases‚ there will be more enzyme activity. Materials: 1. Water/Ice 2. Hot Plate 3. Test Tube 4. Liver 5. Sand 6. Cork 7. Small Circles of Filtered Paper 8. Tub 9. Hydrogen Peroxide 10. Graduated Cylinder
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reactions. (Evert‚ RF & Eichhorn‚ SE 2013). Enzymes also control plant metabolic processes such as respiration (Evert RF‚ Eichhorn SE & Perry JB 2013). This experiment focuses on the enzyme catalase. Catalase breaks down hydrogen peroxide into water and oxygen. Hydrogen peroxide is a waste product of cell metabolism that can be toxic to the cell (Evert RF‚ Eichhorn SE & Perry JB 2013). The
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turnip. Plant peroxidases are involved in lignin formation‚ which is part of the cell wall (Cosio and Dunand 1985). Turnip roots contain peroxidases which are enzymes that can be easily extracted‚ and because peroxidases can liberate oxygen from hydrogen peroxide‚ their activity can easily be measured in the laboratory (Pitkin 1992). The rate of oxygen release is followed by measuring the rate of oxidation of guaiacol‚ which turns brown in the presence of oxygen and thus can be quantified in a spectrophotometer
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