concentration of salt in the cytoplasm of potato cells HYPOTHESIS: Increase in salt concentration results in a hypotonic solution where the mass of the potato increases due to the movement of water into the cell. On the other hand‚ decrease in salt concentration results in a hypertonic solution where the mass of the potato decreases due to the movement of water outside the cell. MATERIALS: Potato Forceps Stopwatch Scalpel Test tubes Knife Mass balance Graduated cylinder ruler salt solution
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Phase 1 Lab Report Title: Human Impacts on the Sustainability of Groundwater Instructions: You will need to write a 1-page lab report using the scientific method to answer the following question: If current human development does not change‚ will groundwater sustainability be affected? When your lab report is complete – submit it in the classroom. Part I: Using the time progression of industrialization and human development‚ fill in the data table below to help you write up your lab report
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Osmosis Design Lab November 19‚ 2011 Biology Defining the Problem and Selecting the Variables Research Question: What will happen to mass of the cell when it is placed in different solutions while trying to reach equilibrium? Background Information Osmosis is the procedure where water or different types of liquids move through a semipermeable membrane. This type of passage is considered as simple diffusion where no energy is required. This means that the liquid will have
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liquids. Time Allocation: Allow 2 hours for this experiment Materials Materials Student provides Label or Box/Bag Qty 1 1 1 1 1 LabPaq provides Auxiliary Supplies BagCK1 © Hands On Labs‚ Inc. 1 1 1 1 1 1 1 1 1 1 1 LabPaq CK-1 Item Description Table salt Piece of string Isopropyl (rubbing) alcohol Tap water Paper‚ 5 cm x 5 cm for weighing chemicals Beaker‚ 100 mL‚ glass Cylinder‚ 25 mL 25-mL volumetric flask Pipet‚ Serological-2mL Bulb‚ Rubber
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Is DDT beneficial? A 1947 ad for Penn Salt Chemicals demonstrates various applications and benefits of illegal and hazardous Dichlorodiphenyltrichloroethane (DDT). The ad tries to persuade industries‚ farmers and families to use the DDT of Penn Salt Chemicals as agricultural sprays and household pesticides by using various misleading and deceptive fallacies and claims. The visuals in the ad are bright‚ colorful and attractive pictures whereas style of written text differ according
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contents of the mixture and added it with 50 mL of distilled water in the 100 mL beaker‚ heated it up to separate the sodium chloride and benzoic acid from the insoluble sand‚ then poured out the benzoic acid and sodium chloride into a separate cup and allowed I to chill in an ice bath for approximately five minutes. I dried up the sand and calculated the net weight for that. I poured the benzoic acid and sodium chloride mixture into a filtered funnel that caught the majority of the benzoic acid and
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Laboratory 9 Lab title: Conductivity of solutions and Household Items PURPOSE: To understand the compounds that dissociate (break into ions) when dissolved in water. Determine ionic compounds are electrolytes. To identify solutions as electrolytic and non-electrolytic‚ and to identify variations in conductivity among electrolytes. Substances that are capable of conducting an electric current in solution are known as electrolytes. Substances that do not conduct an electric current
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Atwaters Halle Bair May 28‚ 2013 Chemistry 36100 Introduction The purpose of this lab was to produce benzoic acid by mixing sodium benzoate with hydrochloric acid. The Hydrochloric acid used in the experiment was a stock solution made by mixing HCl Acid and deionized water. HCl acid‚ historically called‚ muriatic acid or spirits of salt‚ hydrochloric acid is produced from sulfuric acid and common salt‚ NaCl (Princeton.edu). Since the early 1900 ’s‚ sodium benzoate has been used as a food preservative
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m paper Chemistry Notes & Worksheet: Acids‚ Bases & Salt Name : __________________________________________________ ( ) Class : Secondary 3 Maju/Cemerlang Date : ______ August 2012 Acids Definition: Substances that release hydrogen ions (H+) when dissolved in water. Strong Acids | Weak Acids | Chemical Name | Chemical Formula | Organic acids such as citric acid‚ ethanoic acid. | Hydrochloric acid | HCl | | Sulphuric acid | H2SO4 |
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Psychology and your Life Darlene Signoracci Course PSY/201 August 2‚ 2013 Christina Gonzalez Practical intelligence is a learned behavior‚ mostly through observation of others. People with practical intelligence are able to learn general principles and the norms and apply them properly. The way that one responds in a certain situation in a practical manner and without bringing attention to a situation is practical intelligence. They learn through the
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