purpose of this lab was to determine the effectiveness of antiseptics‚ disinfectants‚ and antibiotics on bacteria. The hypothesis was that if bleach was used‚ it would be the most effective because bleach is commonly used to clean and disinfect various things. The variables that were tested were antibacterial soap and Scope mouthwash for the antiseptics; bleach and ammonia for the disinfectant; and Cipro‚ erythromycin‚ and tetracycline for the antibiotics. All of these chemicals were used on the bacteria
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will demonstrate how a chemical reaction from vinegar‚ water‚ and bleach can accelerate the rusting process of steel. If steel wool pads are submerged in bleach‚ water‚ and vinegar‚ then the steel wool pads will rust faster in water because Electrolytes accelerate the corrosion process when combined with water. Materials and Procedure: you will need: Steel wool pads (the soap-free kind) 3 Medium sized jars Water Vinegar Bleach Procedure: 1. Place the steel wool pad into the jar. 2. Fill
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were studied. Elodea was inserted into different beakers. One containing water and the other‚ bleach. The elodea was left unattended for an hour so that observations could be made to tell the difference in the results each beaker produced. After an hour the quantity of CO2 present was measured for the beaker with water and the beaker containing bleach. The results recorded were inconclusive because the bleach had a buffer that evidently lowered the pH‚ the beaker that had water in it showed signs that
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-50 ml glass beaker Bleach Water Lemon juice Vinegar 5 glass test tubes Drying rack Timer Graduated cylinder Hydrogen peroxide Procedure: 1. Place all 5 glass tubes face up in the drying rack 2. Use tweezers and soak one potato cube into water and leave it there for 2 minutes. 3. After 2 minutes‚ use tweezers and place the potato into the first testing tube. 4. Repeat steps 2 and 3 four more times except soaking the other 4 potatoes in baking soda solution‚ bleach‚ vinegar‚ and lemon
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alcohol (rubbing alcohol)‚ bleach‚ and shout. The product that did the best at pulling out stains was the Isopropyl alcohol. Isopropyl alcohol is a clear‚ colorless‚ flammable‚ mobile liquid‚ (CH3)2CHOH‚ used in antifreeze compounds‚ in lotions and cosmetics‚ and as a solvent for gums‚ shellac‚ and essential oils. It did great job at pulling stains right out of the cloth. This products alone got rid of almost all the stains besides the red sharpie. Another product we used bleach. To be honest coming
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different “flower foods” and the role of bleach in the whole system. Abstract: Six Cut flowers (Number. 1‚ 2‚ 5‚ 6‚ 7‚ and 8) were placed in different vases from 10th March 2011 to 25th March 2011. Solution 1 and 2 which contained water and water mix bleach can last for at least 8 days. Solution 5 and 6 which contained lemon juice and sugar were tending to last for longer for 10 days or more. Solution 7 and 8 can only last for 4 – 5 days since Coca Cola‚ bleach and warm water were added. Introduction:
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that do occur successful. Ordinary household bleach is an aqueous solution of sodium hypochlorite‚ NaClO‚ this contains little more than 5% NaClO by mass. Bleaching is caused by the ion. Under normal circumstances this ion breaks down slowly giving off oxygen gas and the chloride ion‚ . In order to speed up this reaction a catalyst is needed. In this experiment the catalyst used was cobalt (II) nitrate solution. When this is added to the bleach a black precipitate of cobalt (III) nitrate is
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we studied the kinetics of the reaction between Allura Red (C18H14N2O8S2) and bleach. C18H14N2O8S2 (aq) + NaOCl (aq) → products Allura Red is a food dye‚ which is an organic molecule with alternating single and double bonds. The color of the dye comes from the delocalization of electrons in the πbonding system (Exton‚ 149). Bleach is an aqueous solution that contains sodium hypochlorite (NaOCl). The hypochlorite of bleach breaks the double bonds of the food dye through oxidation‚ forming molecule
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and expertise which Dr Desnoes shared were a true eye-opener. What is skin-bleaching? The dictionary tells us that to bleach is to make something white or colourless mainly by using chemicals. With skin-bleaching‚ chemicals are used to lighten (or whiten) the skin. The chemicals are applied to the skin directly or are taken by mouth as pills. On the face of it‚ people bleach with a view to getting lighter tones than their natural complexion. The Big Eye News of London‚ England‚ reported recently
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Procedure Exercise 1: Food Safety Part 1 of 2 1) For this experiment items needed are: Two prepared agar plates‚ bleach‚ camera‚ two disposable cups‚ coffee mug‚ leaf of lettuce‚ two small containers of milk‚ hand soap‚ Isopropyl alcohol‚ permanent marker‚ paper towels‚ gloves‚ apron‚ safety goggles‚ face mask‚ four sterile swabs‚ and distilled water. 2) Disinfect the work area with bleach and paper towels. Then‚ wash hands with soap and water‚ put on the apron‚ as well as‚ the safety goggles‚ face
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