household products and classify them as acids or bases Materials: Refer to “Heath Chemistry- Laboratory Experiments” p.230-231 Procedure: Refer to “Heath Chemistry- Laboratory Experiments” p.230-231 ● Change: There should be 5 columns for the Chemical Indicators in the tables. ○ Phenolphthalein ○ Methyl orange ○ Blue litmus ○ Red litmus ○ Red cabbage juice ● Change: There are only 5 unknown solutions (A-E). Part I and II ● Change: You do not need to collect each chemical in test tubes. For Steps 2-8: ○
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extraction of red cabbage pigment‚ use this extracted pigment to standardize against know pH’s‚ test 5 household items to determine the possible pH of these items by using the standardization and assess the pigment’s ability to be used as a Universal Indicator. Risk Assessment: When dealing with fire‚ the Bunsen burner should always be switched to the safety flame before lighting. There will also be hot water during the experiment‚ which means that safety goggles‚ bare skin kept to a minimal incase
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“How to Maintain a Saltwater Fish Tank” | | Advanced Composition SUMBO8 – SEC AS Catherine Quick Due: September 7‚ 2008 | A saltwater fish tank is no ordinary fish tank. A saltwater fish tank is a self-supporting ecosystem‚ as long as it is maintained properly. This means that every element in a saltwater fish tank relies on every other element for survival. Stability must be achieved by monitoring and maintaining specific
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Hydroxide Apparatus * Solid calcium hydroxide * 0.4 mol/dm hydrochloric acid * Distilled water * Pipette * Triple valve rubber pipette filler * Conical flask * Beaker * White tile * Clamp and stand * Methyl orange indicator Producing the calcium hydroxide solution 1. Roughly fill a beaker with 200cm³ of distilled water. This does not need to be accurate because samples will be taken from this. 2. Add solid calcium hydroxide‚ a spatula at a time‚ and stir to
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raised elevation and dry texture. For triple sugar ion is used to differentiate enterics based on the ability to reduce sulfur and ferment carbohydrates. It contains lactose‚ sucrose‚ a small amount of glucose (dextrose)‚ ferrorus sulfate and the pH indicator phenol red. As with the phenol red fermentation broths‚ if an organism can ferment any of the three sugars present in the medium‚ the medium will turn yellow. If an organism can only ferment dextrose‚ the small amount of dextrose in the medium is
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Acid and Bases 1 Determining Acids and Bases SNC-2D1 April 02‚ 2013 Acid and Bases 2 Purpose The purpose of this chemistry lab is to investigate and find patterns/tendencies between substances Introduction An acid is a solution that has more free hydrogen ions (H + ) than hydroxyl ions (OH - ) and a pH less than 7. A base is a solution that has less free hydrogen ions (H + ) than hydroxyl ions (OH - ) and a pH of more than 7. In the late 1800s‚ the Swedish scientist Svante
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4/2/14 Period: 1st Chemistry Sour Acids and Bitter Bases Purpose: The purpose of this lab was to observe the different reactions formed between various acids and bases with the aid of indicators. Equipment: 1. Safety goggles. 2. Droppers. 3. Red Litmus paper. 4. Blue Litmus paper. 5. pH paper. 6. Well plate. 7. Micro spatula. Materials: 1. Zinc. 2. Magnesium. 3. Iron. 4. Copper. 5. HCL. 6. HC₂H₃O₂. 7. NaOH. 8. Phenolphthalein. Procedure: Part A: 1. Add five drops
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CHM 2046 L Scheme of Analysis for Unknown 9A/9B “Fair Game” Unknowns * Cations: Na+‚ K+‚ NH4+‚ Ca2+‚ Mg(H2O)62+‚ Al(H2O)63+‚ Zn(H2O)62+‚ Cu(H2O)2+‚ Ag(H2O)+ * Anions: Cl-‚ NO3-‚ SO4-2‚ HSO4-‚ OH-‚ CO3-2‚ HCO3-‚ S-2 * Insoluble Salts: Ca(OH)2‚ CaCO3‚ CaSO4‚ Mg(OH)2‚ MgCO3‚ Ag2O‚ AgCl‚ Ag2S‚ CuO‚ CuCO3‚ CuS‚ Zn(OH)2‚ ZnCO3‚ ZnS * Alums: [Al(OH2)6]2(SO4)3∙6H2O‚ Na[Al(OH2)6](SO4)2∙6H2O‚ K[Al(OH2)6](SO4)2∙6H2O‚ NH4[Al(OH2)6]2(SO4)2∙6H2O * Hydrated Ions: Na2CO3∙10H2O‚ Na2SO4∙10H2O
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Analysis: Water Analysis Jasmine Kennedy Bey Lab Partners: Mohammed Alabbad‚ Drew Blackson Chemistry 1290-020 3/26/2014 TA: Rajendr Thakuri Purpose/Abstract: Students are tested for their knowledge of basic titration technique and proper usage of specific-use probes (those used for conductivity‚ alkalinity‚ and pH‚ chloride‚ nitrate and hardness detection) on Logger Pro software. The purpose of this comprehensive lab is to determine the chemical properties
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reaction is complete. Knowing the volume of titrant added allows the determination of the concentration of the unknown. Often‚ an indicator is used to usually signal the end of the reaction‚ the endpoint. chemed.chem.purdue.edu/genchem/lab/techniques/titration/what.html In this study we will use an indicator solution called phenolphthalein as an indicator. Phenolphthalein is colourless when the solution is acidic or neutral. When the solution becomes slightly basic‚ phenolphthalein
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