Ghostbuster Slime Lab 10/4/2012 Abstract The purpose of this experiment was to observe the physical properties and changes of the creation of a polymer as a result from cross-linking. A borax solution was made and was combined with a polyvinyl alcohol solution. A polymer’s cross-links give them many properties, like bonding ability, elasticity, and viscosity. The amount of water added in the experiment directly affected the viscosity and elasticity of the slime polymer. Too much water added resulted in a high viscosity and low elasticity.
pyridinium hydrobromide perbromide type of stationary phase column length column temperature rate flow of the carrier gas List the 4 general factors that affect the separation obtained on a gas chromatograph What specific technique is used to collect/isolate your purified unknown compound at the end of the recrystallization experiment? suction filtration 14 of 22 4/16/12 9:15 PM StudyBlue Flashcard Printing of Lab Final 2211L UGA
high melting point, hard, brittle, slightly soluble in water, conductor of electricity when melted or in solution Molecular solid - crystalline solid that has molecules arranged in a particular configuration. low melting point, generally insoluble in water, nonconductor of electricity. Metallic solid - crystalline solid that has atoms of metals arranged in a definite pattern. low to high melting point, malleable, ductile, conductor of electricity, insoluble in most solvents. Lesson 13.6 Changes of physical state: * necessary to draw a temperature-energy graph to see the change in temperature with a constant application of heat Heat of fusion - the amount of heat required to melt 1.00 g of substance.
| | | A) | endoplastic reticulum | | | B) | microtubules | | | C) | cytoplasm | | | D) | mitochondria | | | | | | Feedback: The cell's chemical processes take place in a semifluid material called the cytoplasm. This material provides an ideal environment for organelles because of its fluidity. | | 7 CORRECT | | This shows an example of endoplasmic reticulum. What is the significance of its structure? | | | A) | provides a location for DNA production | | | B) | helps decrease surface area | | | C) | allows selective permeability of cell membrane | | | D) | facilitates breakdown of chemical bonds | | | | | | Feedback: The pleats and folds of the endoplasmic reticulum provides a large surface area where cellular functions, such as breaking chemical bonds, can take place.
Add 1 mL of deionized water to the small test tube containing the precipitate and mix it and centrifuge it for 60 seconds. Then, add the supernatant into the boiling test tube and repeat this step one more time with another 1 mL of deionized water. Acquire a pair of metal test tube holders and heat the boiling test tube to evaporate the water for 15 minutes. Let is cool after and weigh it. Then, calculate a percent yield of zinc iodide and write a balanced chemical equation and determine the limiting
Paper Chromatography Chemistry Lab Report 1 (2015) Final Version Name: Harry He Class: AP Chem 3 Date: Sep.17 , 2015 Terminology Affinity – natural attraction or force between things. Capillary Action – the movement of liquid within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension. Chromatogram – the graphic record produced by chromatography. \ Mixture – a material composed of two or more elements or parts. Mobile Medium – gas or liquid that carries the components (moile phase).
Part 2: Calibrating a Dropper 1. The number of drops in 1 mL water (drops used to move from the 1.00 mL to 2.00 mL mark): Trial 1: 23 drops Trial 2: 22 drops 2. The number of drops on average per one milliliter: 22.5 Part 3: Calculating the Number of Molecules 1. The diameter of the circle formed (cm): 1 cm Calculations 1. Calculate the surface area of the circle formed (πd2/4): Surface area = .785 cm2 2.
This technique is highly used on DNA, RNA, and proteins. This technique is all taken place in a gel electrophoresis chamber. The chamber includes a buffer solution, an Agarose gel, a cathode end, and an anode end. The cathode end of the chamber is negatively charged and will attract molecules that have a positive charge, while the anode end is positively charged and will attract molecules that are negatively charged. The buffer solution is used to keep the pH of the experiment at a constant number while carrying ions that are essential to hold a current.
Label each feature and answer each question below 5. Scan and attach drawings to your lab report Questions & Answers: 1. Why are the Chloroplast traveling along the outer perimeter of the Elodea cell? A.) They are traveling along the outer perimeter to help move the vital nutrients throughout the cell and convert them to substances used in the cell of the Elodea.
DataQuest Properties of Solutions: Electrolytes and Non-Electrolytes 22 In this experiment, you will discover some properties of strong electrolytes, weak electrolytes, and non-electrolytes by observing the behavior of these substances in aqueous solutions. You will determine these properties using a Conductivity Probe. When the probe is placed in a solution that contains ions, and thus has the ability to conduct electricity, an electrical circuit is completed across the electrodes that are located on either side of the hole near the bottom of the probe body (see Figure 1). This results in a conductivity value that can be read by a datacollection interface. The unit of conductivity used in this experiment is the microsiemens per centimeter, or µS/cm.