2 mL of the cobalt chloride solution was added to three separate test tubes (A‚ B‚ and C). 1 mL of silver nitrate (milky white color) was added in test tube A Three gains of calcium chloride was added to test tube B 1 mL of Hydrochloric Acid was added to test tube C Activity D: Solubility of Carbon Dioxide: Approximately 10 mL of fresh seltzer water has mixed with 20 drops of 0.04 % bromcresol green indicator. The initial color was compared to a pH chart. The solution was drawn
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Rates of reaction Sodium Thiosulphate and Hydrochloric Acid An experiment was carried out to investigate the effect of temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid. The equation for this reaction is shown below. Method (1) A measuring cylinder was used to measure 50cm3 of 0.08M sodium thiosulphate solution into a test tube. A bung was placed in the test tube. (2) A pipette was used to measure 5cm3 of 1.0M hydrochloric acid and this was placed into a second
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ConcentrationAim: To investigate how the concentration of a reactant affects the rate of reaction. Hypothesis: The more concentrated the reactant‚ the faster the rate of reaction. Materials: 2M hydrochloric acid solution‚ magnesium wire‚ distilled water‚ 4 test-tubes‚ measuringcylinder. Procedure:1)10mL 2M hydrochloric acid solution is poured into a test-tube using a measuring cylinder. 2)A 3cm length of magnesium wire is added to the acid‚ and the stopwatch is started simultaneously. The time it takes
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fruit’s spoilage‚ were tested on the KaBaPine combination. The test results revealed that there was no significant difference between the voltage produced by pure KaBaPine and those produced by KaBaPine combined with basic or acidic solutions. Using zinc containers of old size C dry cell the contraptions were constructed. The KaBaPine was placed inside as the new electrolyte. The copper wire was soldered to the base of the cap and was used to seal the cell to replace the carbon rod in common dry cells
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carbon dioxide in water. In this experiment‚ the solubility of carbon dioxide in the water of selected temperatures—0°C‚ 20°C‚ 40°C and 60°C—will be tested by using the carbon dioxide gas prepared from the reaction between calcium carbonate and hydrochloric acid and dissolving it in de-ionised water within a gas syringe. In regards to the temperature‚ the gas will not be heated directly but the temperature will be manipulated according to the temperature of the solvent‚ which is de-ionised water
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nitrate and potassium are both transparent but when they mix t changes to a yellow color. 3. Magnesium metal and hydrochloric acid solution Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid slowly and observe the reaction. Next‚ place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. When magnesium and hydrochloric acid are mixed it starts boiling. 4. Electrolysis of water Use a U-tube with electrodes at each end‚ connected
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included sodium bicarbonate and hydrochloric acid‚ bromothymol blue and hydrochloric acid‚ ammonia and bromothymol blue‚ hydrochloric acid and blue dye‚ blue dye and sodium hypochlorite‚ potassium iodide and lead nitrate‚ sodium hydroxide and phenolphthalein‚ hydrochloric acid and phenolphthalein‚ sodium hydroxide and sliver nitrate‚ ammonia and silver nitrate‚ and ammonia and copper (II) sulfate. Some mixtures were also placed in the light or mixed with additional hydrochloric acid or dye. Observation
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Controlled assessment- How concentration affects the rate of reaction between sodium thiosulfate and hydrochloric acid. SA): Strategy Scientific knowledge Sodium thiosulfate (Na2S2O3)‚ also spelled sodium thiosulphate‚ is a colourless crystalline compound that is more familiar as the pentahydrate‚Na2S2O3·5H2O‚ an efflorescent‚ monoclinic crystalline substance also called sodium hyposulfite or “hypo.” Sodium thiosulphate has a melting point of 48 degrees C. It is freely soluble in water. It contains
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Scrub the magnesium strips with steel wool to clean out impurities. 4. Pour out approximately 310 mL of hydrochloric acid from the stock container. 5. Use a 50mL or 100mL graduated cylinder to measure approximately 50mL of hydrochloric acid. 6. Record the volume of hydrochloric acid. 7. Measure and record the initial temperature of hydrochloric acid. 8. Pour hydrochloric acid into the Styrofoam cup (the calorimeter) and add magnesium in. 9. Close the lid immediately with the
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Title of Practical: The Effect of Concentration on Reaction Rate Aim: To use a simple reaction between sodium thiosulphate and hydrochloric acid to discover concentration this determines how fast chemical reactions occur. Independent Variable: Concentration of hydrochloric acid (%) Dependent Variable: Time taken for chemical reaction to take place (sec) Hypothesis: My prediction is that the increased concentration of the thiosulfate will in turn lead to an increase in the rate of reaction
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