-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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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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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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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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fermentation‚ we repeated that procedure except instead of putting each fermentation tube into a certain temperature of water‚ we used the same temperature of water but each tube had a different amount of bleach in it. We put 0 drops of bleach in the first one and increased by 2 drops of bleach every tube‚ ending up with 10 drops in the sixth fermentation tube. We monitored the amount of
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Knowing how to wash clothes —without ruining them — is a basic life skill. Before you load up the washing machine‚ you have to do some prep work such as separating items by color and texture‚ choosing the right washing cycle‚ and knowing how much detergent to add. All this calls for just a little practice‚ but you’ll get the hang of it in no time. Separate and divide for laundry success Not all fabrics are made the same‚ so you need to create piles of items based on color and fabric type:
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bactericidal agents‚ bleach‚ hydrogen peroxide‚ and isopropyl alcohol‚ were tested. This was done by creating aqueous solutions of staphylococcus epidermidis bacteria and a chemical agent. The solutions were then incubated on an agar petri dish for 24 hours. The quantity of staphylococcus epidermidis bacteria colonies that were grown were used as an indicator of how effective each agent was in killing the bacteria. Each bactericidal agent has its own mechanism for killing bacteria. Both bleach and hydrogen
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