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    Title Laboratory Techniques and Measurements Purpose The purpose of this experiment is to determine mass, length, temperature, volume, and density of objects and liquids using common measuring devices and algebraic formulas. The metric system, the most common set of measurements used in science, which includes meters, liters, Celsius, and grams will be used. Procedure The following items were used within the experiment: (1) Metric ruler with centimeter (cm) and millimeter (mm), (1)

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    Notes On Acids And Bases

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    do not usually give off a distinct smell, but are usually quite slippery. Bases react with most oils and fats, such as Detergent reacting with human skin, and slowly breaking down the oils and fats in the skin tissue.(Guch, 2003) The universal indicator is used for specifying whether a substance is a Base, Neutral, or an Acid along the pH scale, by measuring the concentration of H3O+ ions in a substance. (N.a, 2016) The pH scale is a scale that determines whether a substance is an Acid product

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    Lab Report : Ph Titration

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    to determine the equivalence point”. Titration is a technique where one reactant is slowly added to a second reagent until the equivalent point is achieved. Chemical indicators are substances that change their colour at a specific ratio of reactant concentrations, which is known as the end point. In a titration, a chemical indicator is chosen so that the equivalence point and the end point are the same. This experiment is an acid-base titration. “the (previously unknown) concentration of an acid

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    A Study On Nutrient Agar

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    Nutrient Agar To observe the colony morphology, the original unknown culture was streaked for isolation on nutrient agar using the quadrant streaking technique, inverted, and incubated at 37° C for 48 hours. This allowed for observation of the colony morphology. Separation of Gram-positive and Gram-negative The original unknown culture was streaked for isolation on Columbia CNA agar and MacConkey agar using a quadrant streak, inverted, and placed in a 37° C incubator for 48 hours. CNA agar contains

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    used to differentiate strains of coliform bacteria capable of performing mixed acid fermentation that will lower the pH despite the phosphate buffer (http://faculty.deanza.fhda.edu). Mixed acid fermentation is confirmed by using methyl red as an indicator. It is red ant pH 4.4 and below, yellow at pH 6.2 and above, and orange in between. Red is a positive result reported as (+), yellow is a negative result reported as (-), and orange is negative or inconclusive. The Voges-Proskauer test to detect

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    7.03 Lab Ph Essay

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    Procedure: Part I: Titration with an Indicator 1. Fill the 50-milliliter buret with a 0.25 molar NaOH solution. 2. Record volume. 3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution. 4. Record volume. 5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask. 6. Add two drops of the indicator, phenolphthalein, to the acid in the flask. 7. Using the slider on the right hand side, add NaOH to the HCl in the Erlenmeyer flask (This action

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    Quality Control Technique

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    Introduction Quality control is a technique used to evaluate objects that people use on a day-to-day basis. This technique is used to evaluate the ingredients in food and see if they are accurate. The objective of this quality control experiment was to examine different acid and base materials and test their pH levels. As a part of the experiment, a procedure was formed to create NaOH and HCl standard solutions and then conduct acid-base titrations to decipher between the acid-base materials. The

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    The water sample with the lowest pH was the Dhaka water sample, which had a pH of 2.52, making it the most acidic water. This was followed by Port River water, which had a pH of 4.6, Waterfall Gully water sample at 4.75, and Johnston 's Creek at 5.29 (refer to Table 1 and Figure 3). The Dhaka sample 's pH is between the acidity of vinegar and orange juice (ScienceBuddies, 2015). Figure 3: Average pH/acidity of the water samples. Not all samples were titrated, as both Waterfall Gully and Johnston

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    INTRODUCTION Food additives have been used for centuries to help preserve foods, improve flavor and texture, and enhance the nutritional value in food. The Food and Drug Administration (FDA) has a list of over 3,000 food additives that are safe for consumption by humans. (1) The first lab experiment conducted used food additives to compare the physical and chemical properties of three different thickening agents: corn starch, modified food starch, and guar gum. Guar gum is a thickening agent, but

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    The Big Advantage

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    One of the big advantage is that they can be less expensive compared to other way of measuring the pH.This means that it helps to reduce the amount of money needed to do the test.This is because you can buy pack of them for much lower price than a Hi98103 hanna, which cost lot more money to buy one of them compared to litmus paper. Another advantage is that it is very easy to use and this means that you do not need a training for you to use it and because it is less complicated means that anyone

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