How does the temperature of water affect how fast sugar can dissolve?
How does the temperature of water affect how fast sugar can dissolve?
Predict
We will do three different tests, dissolving the water in boiling, warm and cool water. The sugar in the boiling water will dissolve the fastest. The sugar added to the cool water will dissolve the slowest.
Reason
According to the state of matter theory, the particles in a gas move faster than in a liquid, which I will use to infer that the hotter the water is and closer to a gas, the faster the particles move. Therefore when sugar is added to the boiling water it will break down faster as the particles are moving more quickly and will collide with the sugar which will bond with the water and therefore dissolve or break it down. As the cooler water has slower moving particles, it will take longer for them to collide with the sugar and break it down.
Observe
In order to conduct the experiment and test the hypothesis, three experiments were conducted using boiling water, hot water (tap on hot) and cold water (tap on cold). Half a cup of water was used for each experiment, to which 1 teaspoon of white sugar was added and then stirred until dissolved.
Diagram of the setup showing 1/2 cup of water and a one teaspoon measuring spoon.
Boiling water- The sugar added to the boiling water began to instantly dissolve, taking 7 seconds to completely disappear.
Warm Water- The added sugar sank to the bottom of the cup. As I began to stir, the sugar granules appeared to shrink in size and become more transparent before finally disappearing. This process took 25 seconds.
Cool Water- Once again the sugar sank straight to the bottom. When stirred, the sugar began to visibly break down, however this process was slower than in the warm water. The sugar took 45 seconds to completely dissolve.
Explain
The prediction was correct as the sugar dissolved the fastest in the boiled water. However the cause of this is more detailed than the one suggested.
Sugar is a molecule called
Predict
We will do three different tests, dissolving the water in boiling, warm and cool water. The sugar in the boiling water will dissolve the fastest. The sugar added to the cool water will dissolve the slowest.
Reason
According to the state of matter theory, the particles in a gas move faster than in a liquid, which I will use to infer that the hotter the water is and closer to a gas, the faster the particles move. Therefore when sugar is added to the boiling water it will break down faster as the particles are moving more quickly and will collide with the sugar which will bond with the water and therefore dissolve or break it down. As the cooler water has slower moving particles, it will take longer for them to collide with the sugar and break it down.
Observe
In order to conduct the experiment and test the hypothesis, three experiments were conducted using boiling water, hot water (tap on hot) and cold water (tap on cold). Half a cup of water was used for each experiment, to which 1 teaspoon of white sugar was added and then stirred until dissolved.
Diagram of the setup showing 1/2 cup of water and a one teaspoon measuring spoon.
Boiling water- The sugar added to the boiling water began to instantly dissolve, taking 7 seconds to completely disappear.
Warm Water- The added sugar sank to the bottom of the cup. As I began to stir, the sugar granules appeared to shrink in size and become more transparent before finally disappearing. This process took 25 seconds.
Cool Water- Once again the sugar sank straight to the bottom. When stirred, the sugar began to visibly break down, however this process was slower than in the warm water. The sugar took 45 seconds to completely dissolve.
Explain
The prediction was correct as the sugar dissolved the fastest in the boiled water. However the cause of this is more detailed than the one suggested.
Sugar is a molecule called
References: Bodner Research Web. (2006). Solubility. Retrieved April 3, 2012, from Purdue Univeristy: Division of Chemcial Education: chemed.chem.purdue.edu/genchem/topicreview/bp/ch18/soluable.php Frangenehim, E. (2007). Reflections on classroom thinking strategies. Loganholme: Rodin Educational Publishing. The Particle Theory. (2012). Retrieved April 3, 2012, from Click and learn: http://www.clickandlearn.org/gr9_sci/particle_theory.htm What is sugar? (2011). Retrieved April 4, 2012, from Exploratorium: http://www.exploratorium.edu/cooking/candy/sugar.html