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How Temperature affects the Rate of Dissolving Lab

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Introduction

How Temperature affects the Rate of Dissolving Question: What is effect does temperature have on the rate of dissolving sugar in water? Hypothesis: If the temperature increases then the sugar will dissolve faster in the water since in a warmer solvent the particles are moving faster, therefore allowing the particles of the solute to mix with the particles of the solvent quicker. Variables: Independent variable is the temperature of the water Dependent variable is the rate of dissolving measured by time. Controlled variables: Variables How to Control The amount of water to dissolve the sugar in Measure the water with a cylinder beforehand The amount of sugar added to the water Measure ...read more.

Middle

Measure 200ml. of tap water with a graduated cylinder and pour it into a beaker. Measure and record the temperature, with a thermometer, of the water. 2. Then add 25 grams of sugar to the water and measure the time with a stopwatch, record the time it takes to completely dissolve. Stir every 5 minutes for saving more time. 3. While the first beaker is dissolving, set up the heating apparatus. (using Bunsen burner, tripod and a metal gauze) 4. Measure 200ml. of tap water and pour it into the beaker, heat the beaker with the Bunsen burner, until the temperature reaches 40?. ...read more.

Conclusion

8. Then, following the steps before, heat the water until its temperature reaches 80?. 9. Add another 25 grams of sugar, measure and record the time. Diagram: Data Collection: Water Temperature (?) Time taken to dissolve (minutes) 19 17:02 40 9:38 60 6:38 80 5:04 Conclusion: By observing the data collection, the time the sugar takes to dissolve is faster when the water temperature is higher. This states that dissolving takes place faster when the temperature reaches the ideal point for the reaction that causes a compound to break down. As a result, increasing the temperature increases the rate of dissolving because the solvent molecules are moving more rapidly at higher temperatures and therefore come into contact with and solvate the solute molecules more rapidly. ?? ?? ?? ?? ...read more.

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