the growth of Microorganisms? Aya Zbedah Ballard High School The purpose of this project is to see which preservative will either slow down the growth of bacteria or speed up the growth using the three most common preservatives: sugar‚ salt and‚ vinegar. Humans usually have a problem keeping their food safe and clean at the same time to prevent from getting sick. But what they don’t know is that the way they preserve their food can be very dangerous. Since the drying effect of salt has been used
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Name: Jeanne Yoo|Date: 07/15/13| Exp 1: Observations of Chemical Changes|Lab Section: 1411-76426| Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl|1 |clear bubbles formed| B.|HCl + BTB|2 |turned orange after BTB was added‚ transparent‚ acidic| C.|NH3 + BTB|3 |turned dark blue after BTB was added‚ opaque‚ basic| D.|HCl + blue dye| |blue dye was missing from kit| E.|Blue dye + NaOCl| |blue dye was missing from kit| | with the 1 drop of HCl| ||
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BACKGROUND INFORMATION HOW DOES ONE DIFFERENTIATE THEM? There are several ways to classify substances. One way is based on their pH. Substances may be * Acid 2. Base 3. Neutral INDICATORS This is a substance which is one color in and acid and another color in a base. Indicators can ten be used to test for the presence of acids or bases in a substance. Some are available in paper form (litmus) and others in liquid form (methyl orange)
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This scroll represents china’s three main religions; Buddhism‚ Confucianism‚ and Taoism. Three men are standing around a bowl full of vinegar. Each man has tasted the vinegar and has a different expression on his face. The Buddhist has a bitter expression on his face‚ representing that life is bitter and full of pain and suffering. A life for a Buddhist is full of attachments that lead to desires‚ and
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didn’t really need to. A hot plate to heat up the water. 200 ml tap water‚ three 250 ml beakers‚ one heat-proof glass funnel. Filtered paper‚ vinegar‚ hydrogen peroxide‚ a steel wool‚ gum Arabic and pens and paper. III. Summary of Procedure: Well first we had to boil up the water and the tea. When that was done boiling and heating up we added the vinegar and steel wool. It had changed color by doing this. It changed to a lightish brown color‚ kind of like tea. Then we added a little spoon full
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NaOH | | Initial Volume | 1.48ml | 9.25mL | 17.40mL | | Final Volume | 9.25mL | 17.10mL | 25.20mL | | Volume used | 7.77mL 10mL | 17.85mL 10mL | 7.8mL 10mL | | Table 2: titration of vinegar | Trial 1 | Trial 2 | Trial 3
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The Law of Conservation of Mass Goals: 1. To identify the parts of a chemical equation. Students need to identify subscripts‚ coefficients‚ reactants‚ products‚ chemical formulas‚ and chemical symbols 2. To appreciate that scientific discoveries are often the result of inquiry. 3. to distinguish between an element‚ a compound‚ and a mixture (and between heterogeneous and homogeneous mixtures) 4. To balance a chemical equation in order to prove that the Law of Conservation of Mass works quantitatively as well as conceptually
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foods are eaten in the Philippines. Want to try some? Adobong pusa or cat adobo Do you know that even cats are eaten by people in the Philippines? They cook it in adobo style‚ sautéed with garlic‚ onion and laurel leaf seasoned with soy sauce and vinegar. This is a favorite appetizer during their drinking spree. Adobo/ prito o litsong daga or adobo/ fried or roasted rat Rats from the rice paddies are also eaten. They would skin them‚ cut the head‚ the tail‚ and the legs then all internal organs
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hydrochloric acid‚ 1M sodium hydroxide‚ ammonia‚ vinegar‚ distilled water 4. pH indicator dropper bottles: bromothymol blue‚ red litmus paper‚ methyl orange‚ phenolphthalein Procedure: 1. Number the wells in the depression plate form 1-6 with the sharpie. 2. Into each well on the depression plate‚ add 10 drops of the following substances: a. Well 1: 1M hydrochloric acid b. Well 2: 1M sodium hydroxide c. Well 3: distilled water d. Well 4: milk e. Well 5: vinegar f. Well 6: ammonia 3. Test each well
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Eczema is a chronic issue that triggers inflammation of your skin. Symptoms of eczema include rough spots on skin‚ rashes‚ itching‚ dryness‚ redness and dark. Frequently hideous scars‚ which take lots of time to evaporate are left behind by eczema. In addition to lotions or your regular medications‚ attempt some simple natural treatments for eczema scars. 1. Honey Honey can be used to take care of various skin problems including eczema. Eczema can be reduced by the antibacterial‚ antiseptic and
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