Name: |Date:| Exp 1: Observations of Chemical Changes|Lab Section: | Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl| H12|White and bubbled slightly and settled down to smaller smaller bubbles| B.|HCl + BTB| H11|Golden yellow; looked darker under the black paper| C.|NH3 + BTB|H10 |Dark blue| D.|HCl + blue dye| H9|Greenish color| E.|Blue dye + NaOCl| H8|Blue and lighter than NH3+BTB solution color| | with the 1 drop of HCl| H8|Turned blue green
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General Lab Safety Experiment 1: Neutralization of Acids and Bases In this experiment‚ you will learn how to properly neutralize and dispose of acidic and basic solutions. Materials 5 mL 4.5% Acetic Acid (vinegar)‚ C2H4O2 2 Pipettes (1) 250 mL Beaker 0.5 g Sodium Bicarbonate (baking soda)‚ NaHCO3 (1) 10 mL Graduated Cylinder 2 Weigh Boats (1) 100 mL Graduated Cylinder *Water 8 Litmus Test Strips (Neutral) Permanent Marker *You Must Provide Procedure 1. Use the permanent marker to label
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Introduction In physics we must distinguish between vector quantities and scalar quantities. Vectors are quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity’s magnitude. Although a vector has magnitude and direction‚ it does not have position. That is‚ as long as its length is not changed‚ a vector is not altered if it is displaced parallel to itself. In contrast
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Experiment 1: Bromination of Acetanilide1 Precautions: Ethanol is flammable Sodium hypochlorite is an oxidizing agent and releases toxic fumes (handle in fume hood) Acetic acid is corrosive‚ harmful if inhaled‚ flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of acetanilide to p-bromoacetanilide Procedure: To a 125 mL Erlenmeyer flask containing a mixture of 95% ethanol (6 mL) and acetic acid (5 mL)‚ dissolve
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Experiment 1: Calorimetry Nadya Patrica E. Sauza‚ Jelica D. Estacio Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City 1101 Philippines Results and Discussion Eight Styrofoam ball calorimeters were calibrated. Five milliliters of 1M hydrochloric acid (HCl) was reacted with 10 ml of 1M sodium hydroxide (NaOH) in each calorimeter. The temperature before and after the reaction were recorded; the change in temperature (∆T) was calculated by subtracting the initial temperature
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Long stands of double helical DNA can fit into the nucleus of a single cell because DNA is specially packaged through a series of compaction events to fit easily within cell nuclei. Even though the length of DNA per cell is about 100‚000 times as long as the cell itself‚ it only takes up only about 10 percent of the cell’s volume. The DNA molecule‚ in order to condense‚ wraps itself around groups of histone proteins‚ and then the chromatin folds back on it‚ nucelosomes pack together to create a compact
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Questions and Problems: 1. Describe the type of meter movement used in analog meters. The current in the circuit is used in basic meters to measure the voltage drop or current in the circuit. The current passes through the coils of wires‚ which is then magnetized. Inside the apparatus‚ there is also a permanent magnet which opposes the magnetic field of the magnetized coil of wire that is connected to the pointer therefore‚ as we see in meters‚ the pointer moves. There is also a spring connected
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DNA‚ RNA‚ PROTEINS STARTS WITH ? Name _______________________________ 1. DNA that is spread out in the nucleus of a non-dividing cell so it can be read is called _C_ __ __ __ __ __ __ __ __ . 2. The group of 3 nitrogen bases in the mRNA message that is read together is called a _C_ __ __ __ __. 3. In dividing cells‚ the DNA is scrunched into _C_ __ __ __ __ __ __ __ __ __ __ so it can be moved. 4. The mRNA message tells the ribosomes which _A_ __ __ __ __ _A_ __ __ __ to put in next
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Write a 350 to 700 word summary describing if the collection of DNA without consent unreasonably intrudes on an arrestees’ expectation of privacy. How long can police keep your DNA on file after an arrest or conviction? Can law enforcement use a person’s DNA to match against other crimes unrelated to the one they initially obtained it for? Provide examples and or reasons. The collection of DNA without consent can unreasonably be seen as intruding on someone who has been not been arrested however
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DNA DNA‚ or Deoxyribonucleic Acid‚ is described‚ in Encarta Encyclopedia as a genetic material of all cellular organisms and most viruses. DNA carries the information needed to direct protein synthesis and replication. Protein synthesis is the production of the proteins needed by the cell or virus for its activities and development. Replication is the process by which DNA copies itself for each descendant cell or virus‚ passing on the information needed for protein synthesis. In most cellular
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