Data Analysis The pH of a liquid affects the brownness of a banana. This experiment was started by the question‚”Does the pH of a liquid affect the browning time of a banana? “ The hypothesis was “that the lower the pH the less brown a banana will turn.”. The experimental group was bananas placed in liquids with varying pH levels : lemon juice‚ lime juice‚ vinegar‚ baking soda water‚ alkaline water‚ and distilled water. This experiment’s dependent variable is the number of spots each banana has
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Experiment 3 Liquid-Liquid Extraction Discussion The success of extracting each compound out of the solution can be seen in the IR graphs for each substance. For ethyl 4-aminobenzoate‚ the N-H‚ C=O and C-O are distinguishable in their proper wavenumber positions. The amino N-H stretch was found between 3224 cm-1 and 3423 cm-1. The C=O was found at 1681 cm-1 and the C-O was at 1280 cm-1. The IR for benzoic acid also displays its significant bonds‚ O-H and C=O. The O-H was between 2566 and
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normally recognised as a drug to most. Caffeine has an effect on your heart rate‚ (this is how fact your hear beats) Caffeine is able to change the way your body and mind works Chocolate is known to have traces of caffeine in it also The aim What is the point this experiment;- My aim in this experiment is to see what effects caffeine is prone to on the heart rate‚ Also to compare someone’s heart rate who has consumed caffeine to someone’s who hasn’t. This should give us a developed
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of solvent extraction‚ also known as liquid-liquid extraction‚ a method of separating two materials with different physical and/or chemical properties. Two methods of evaporation will be used to finally determine the concentration of impurity- one using an explosion-proof hot-plate‚ and one using a rotovap. III. Theory Fig. 1a+1b. Figure 1a shows how water and oil separate in the separatory funnel‚ while figure 1b shows the actual apparatus. Liquid-Liquid extraction is a versatile and dependable
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the pH of several different liquids as well as learning how to change the pH of those liquids by adding other acidic and alkaline mixtures. Materials: Graduated cylinder- used to measure the various liquids 4 100 mL beakers- used to hold liquids when measuring pH pH meter- used to measure the pH of the various liquids Tap water- liquid we are trying to find pH of Distilled water- liquid we are trying to find pH of Soda- liquid we are trying to find pH of Milk- liquid we are trying to find
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Factors that affect exchange rates. Like any price‚ the exchange rate deviates from the cost basis - the purchasing power of currencies – under the influence of supply and demand of currency. The ratio of the supply and demand depends on several factors. It reflects connections with other economic categories - cost‚ price‚ money‚ interest‚ balance of payments‚ etc. There is a complex of interweaving and nomination of decisive factors. Among them are the following. • 1.The rate of inflation. The
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The order that the liquids were in was blue‚ orange‚ green‚ yellow‚ and red. On our first trial‚ we only put in blue‚ green‚ red‚ and yellow mixtures inside the test tube. Before we even put in the orange solution‚ the yellow liquid started to mix in with the red solution. It meant that the yellow sugar water was more dense than the red sugar water. On our second trial‚ we tried to put the green mixture first to see what would happen. When we put the green mixture inside the test tube‚ we decided
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Effects of different liquids on the elasticity of a rubber band Luke lash and Charles baker Question: If we submerge rubber bands in different liquid substances‚ will its elasticity of the rubber bands increase? Hypothesis: If we use a more acidic substance like vinegar‚ then elasticity of the rubber band will increase. Background: We are conducting this experiment because although it has been done before‚ the substances that have been used before are generally ordinary. Others have used hot
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with those percentages from our smaller sample of sand‚ salt‚ and iron. Variables: Independent Variable | Separating salt‚ sand and iron fillings | Dependent Variable | The percentage of each component in the mixture | Controlled Variable | What would happen if you didn’t control this Variable? | How are you going to control this Variable? | The amount of water | If I didn’t control this then I could have had too much water to evaporate and it could take long. | I will control this variable
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The question I will be investigating is on how fast ice melts in different liquids. The liquids being tested are water‚ salt water‚ hydrogen peroxide‚ and Pepsi. The ice will be placed in each of these liquids when the liquids all reach room temperature. Some people assumed that Coca Cola would melt the ice the fastest because of it’s carbonation. But when tested they found that at room temperature water melted the ice the fastest(2). Another person tested how fast water‚Sprite‚ and orange juice
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