Back Laboratory Program SAFETY IN THE CHEMISTRY LABORATORY 786 Pre-Lab Extraction and Filtration 790 1-1 Mixture Separation 792 1-2 Water Purification 794 3-1 Conservation of Mass 798 4-1 Flame Tests 801 Pre-Lab Gravimetric Analysis 828 13-1 Separation of Pen Inks by Paper Chromatography 830 13-2 Colorimetry and Molarity 834 14-1 Testing Water 838 804 7-1 Separation of Salts by Fractional Crystallization 806 7-2 Naming Ionic
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WYNDHAM INTERNATIONAL: FOSTERING HIGH-TOUCH WITH HIGH-TECH Summary The Harvard Business Review case study on Wyndham International discusses the inception of the hotel company‚ its initial exponential growth followed by a rapid decline in 1999 due to various external and internal factors. The organization restructuring and changes in management introduced several guest loyalty programs‚ ByRequest in particular‚ to allow Wyndham International to reestablish its brand. This paper discusses the
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Physical and Chemical Change Objective: Recognize and distinguish between chemical and physical changes. Materials: - lab balance - microspatula - lab burner - dropper pipet - 5 test tubes - mortar and pestle - test tube rack - magnet - test tube holder - insulating pad - watch glass - safety goggles - glass square - lab apron or coat - copper sulfate pentahydrate - iron fillings - sodium chloride - magnesium ribbon - hydrochloric acid - paper
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Problem What effect does the different concentration of hydrochloric acid have to the rate of diffusion of agar that is dissolved with sodium carbonate and phenolphthalein? Introduction Diffusion is a process where the molecules intermingle as a result of their kinetic energy of random motion and is the net movement of like molecules down their concentration gradient‚ which is the energy inherent in their constant molecular motion makes them collide and careen outward from the region of higher
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Assignment B 1) The text You Can’t Touch Me is about primary school-teacher Ian Goade‚ who intervenes as he spots a group of boys bullying a younger one. His reaction is to rush to help the little one‚ and then turning to deal with the older boys. The leader of the group‚ Campbell‚ is refusing to take any scolding Goade might have for him‚ and is defying him by talking back and refusing to go to the headmistress’s office. Goade then reacts by grabbing the boys arm in order to drag him to the
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Touch: Effect of Touch on Infants Harry Harlow conducted experiments on baby monkeys to see how their behavior would develop if they did not have the influence of touch from their mother. Harlow placed new born infant monkeys into a crate with a "wire-mother" for feeding‚ and a "cloth-mother". By observing their behavior he noticed things that were similar to autistic children such as: rocking‚ social withdrawal‚ self-clasping and grooming. He did tests and discovered that the stress hormone
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conducted in association with a second laboratory that measured the effects of an inhibitor on the enzymes. Changes in temperature and pH along with Substrate Concentration and Enzyme Concentration were the conditions tested in the experiment. Each lab was assigned to a group A‚ B‚ C and D in our class performed this experiment. The data presented in this report will reflect the average rates of change in O2 ml/min of our class results. In the later discussion sections‚ it will become
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Lab Report Background Information: Magnesium is an alkaline earth metal that has the symbol Mg. Magnesium is a fairly strong‚ silvery-white‚ light-weight metal (one third lighter than aluminum). In a powder‚ it heats and ignites when exposed to moisture and burns with a white flame that is harmful to the eyes. It is difficult to ignite in bulk‚ but once ignited‚ it is difficult to extinguish. Magnesium Ribbon is a long strip of magnesium metal about 3 millimeters wide and 10 meters long with
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1. Discuss how to protect yourself from body fluids‚ such as saliva and blood. o Gloves protect you whenever you touch blood‚ body fluids. The use of gloves also decreases the risk of disease transmission if you are pricked with a needle. Always wear gloves for handling items or surfaces soiled with blood or body fluids. o Wash your hands and other skin surfaces immediately after they come in contact with blood or body fluids. o Masks and protective eyewear‚ such as goggles or a face shield
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volume‚ mass‚ and density of objects and liquids. Time Allocation: Allow 2 hours for this experiment Materials Materials Student provides Label or Box/Bag Qty 1 1 1 1 1 LabPaq provides Auxiliary Supplies BagCK1 © Hands On Labs‚ Inc. 1 1 1 1 1 1 1 1 1 1 1 LabPaq CK-1 Item Description Table salt Piece of string Isopropyl (rubbing) alcohol Tap water Paper‚ 5 cm x 5 cm for weighing chemicals Beaker‚ 100 mL‚ glass Cylinder‚ 25 mL 25-mL volumetric flask
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