How does sodium chloride effect the growth of Phaseolus vulgaris? [Type the document subtitle] TABLE OF CONTENTS page number 1 DESIGN 1 1.1 Defining the problem 2 * Focus / research question * Hypothesis * Background information / theory * Investigation Variables 1.2 Controlling Variables 3 * Treatment of Controlled Variables * Control Experiment 1.3 Experimental Method 4 * Materials
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Aim: To compare the foaming capacities of five different commercial soaps. Apparatus: 5 test tubes‚ 5 conical flasks (100 ml)‚ test tube stand‚ Bunsen burner and stop watch. Materials Required: 5 different samples of soap and distilled water Theory: The foaming capacity of a soap sample depends upon the nature of soap and its concentration. This can be compared for various samples of soaps by taking the same concentration of solution and shaking them.The foam is formed and the time taken
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Neutralization experiment AIM:- To investigate how heat is given out in neutralizing sodium hydroxide (NaOH) using different concentrations of Hydrochloric Acid. Background Information:- Substances that neutralize acids are called alkalis. An acid is a substance that forms hydrogen ions (H+ ) when placed in water. It can also be described as a proton donor as it provides H+ ions. An example of an acid is hydrochloric acid (HCl)‚ Sulphuric acid (H2SO4) etc. An alkali is a
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An investigation to show how the rate of reaction between hydrochloric acid and sodium thiosulphate is affected by the concentration of the acid Simple Procedure Place a conical flask on a piece of paper with a cross on it. Add hydrochloric acid and sodium thiosulphate‚ and record the amount of time taken for the cross to disappear through the solution from the top of the flask. Record this time and repeat this for different concentrations of hydrochloric acid. Fair Test The variables in
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and use hand pumps to extinguish fires. Every family had a leather water bucket to put out a fire. In the case of a fire‚ all the neighbors grabbed their buckets and helped put out a fire. In the late 1800’s and the early 1900’s people would but bicarbonate soda was dropped into tanks in order for there to be pressure for water to squirt out. These tanks were carried by Chevy trucks. Next came gasoline driven pumps that had a limited amount of water in a tank. Soon‚ authorities required a water hole
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are the slower rate of movement.1 2.3. The aim of this investigation is to evaluate the process of Osmosis and Diffusion on different concentrations of sodium chloride on a de-shelled chicken egg over a period of 24 hours. 2.4. My hypothesis relating to this investigation is that the de-shelled eggs in different sodium chloride solutions will absorb the water through the process of osmosis which will cause the eggs to increase both their weight and size. 2.5. The outcome
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Part Ca)Up until the 1940’s rubber had only been obtained from the latex of rubber trees(Hevea brasiliensis) in plantations situated in tropical areas such as Malaya and Burma. The demand for rubber increased significantly during world war 2 as rubber was needed for tyres of military vehicles and the supply was interrupted by the conflict between the countries. Scientists in Germany and the US developed synthetic polymers that could replace rubber. Even after the war ended the traditional sources
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Baking soda is basically sodium bicarbonate or sodium hydrogen carbonate. Sodium bicarbonate (Baking soda) is shown as a white powder which looks like salt. Baking powder contains an amount of raising agents which are E450 Diphosphates‚ E500 Sodium Carbonates‚ and Maize Starch. By heating this up there will be a release of carbon dioxide‚ which will be put into test in my experiment to prove my hypothesis. Baking powder and baking soda both produce carbon dioxide‚ which helps raise baked products
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cells‚ including that in the interstitial or tissue spaces and blood vessels. The ECF‚ including the plasma and interstitial fluids‚ contain large amounts of sodium and chloride‚ moderate amounts of bicarbonate‚ but only small quantities of potassium. In contrast to the ECF fluid‚ the ICF contains small amounts of sodium‚ chloride‚ and bicarbonate and large amounts of potassium ← The cell membrane serves as the primary barrier to the movement of substances between the ECF and ICF compartments
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acidic [H+] increases = more acidity CO2 is an example of an acid. HCl 2 H+ H+ ClH+ H+ ClH+ 7 ClpH ClCl- As concentration of hydrogen ions increases‚ pH drops Base • A base is chemical that will remove hydrogen ions from the solution • Bicarbonate is an example of a base. NaOH Na+ OH- H + ClH+ ClNa+ OHH+ ClH+ Cl- Na+ OHH+ ClNa+ OH- 2 7 pH Acids and basis neutralize eachother A change of 1 pH unit corresponds to a 10-fold change in hydrogen ion concentration 2 Na+ ClNa+ H+ Na+
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