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A way to push this investigation further is by doing a similar experiment but changing the dependent variable/solute for example you could do an investigation on how the change in temperature of water affects the solubility of salt. This could help your understanding of how the change in water temperature affects the solubility of other solids. Another way to push this investigation further is by keeping the temperature of the water the same and instead of having multiple solutes, for example, sugar, salt, chalk, baking soda, etc. This would help you to understand what solids are more soluble than others or what solids can’t dissolve in water. A different question that I would like to investigate because of what I have learned is why are some solids more soluble than others or what makes insoluble solids different from soluble solids.

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The reliability of this experiment met the goal, though there are certain parts that need improvement. When the sugar was being mixed it could have been more precise for example, there was always a difference in the amount of sugar that could dissolve after every trial. To avoid this from happening the water can be reheated before every trial to make sure the water is at the temperature it should be. Another way to improve is by looking closely at the sugar when it's taking longer to dissolve in order to know exactly when no more sugar can be dissolved. The tools used were precise and used correctly. If someone followed the method exactly as it says, then they would get the same results, additionally, the experiment isn’t complicated so they should not struggle. The data was similar though not consistent there was always a difference of 1-2 grams of sugar. The experiment was valid because it supported the hypothesis and helped to answer my question.

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If the temperature of the water is increased, then the solubility of sugar will increase. This is because when sugar is dissolved in hot water the process of the molecules breaking apart is happening at a faster rate (“Dissolving Solids”). For example, when sugar is dissolved in 20 degree celsius water the solubility is 204g, but when sugar is dissolved in 40 degree celsius water the solubility is 241g (Does Temperature). This information indicates that as the temperature of the solvent increases solid solutes will have a higher solubility. Another reason why sugar can be broken apart so easily is because both sugar and water are covalently bonded which means that they share the same chemical bond, which leads them to become attracted to each other.

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For this experiment to be accurate there have to be constant variables for example the amount of water, the glasses used, the thermometer, and the scale. If any of these variables are changed such as the amount of water then the solubility will be inaccurate. The amount of water will be controlled by making sure it weighs 100g when preparing the materials. The glasses used will be controlled by making sure after every trial that they are rinsed and clean in order to use the same exact glasses for the next trial. Next, the thermometer will be controlled by making sure it's used consistently during every trial. Lastly, the scale will be controlled by using the exact same one during every trial.

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The variable that is measured is the solubility of sugar. The dependent variable can’t be alone. To be more specific it depends on the independent variable. For example after 3 trials the independent variable (temperature of water) will change from 10 degrees celsius to 20 (then to 30-40-50), this then results in a change with the dependent variable.

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The temperature of the water is being manipulated since it’s changing 5 times throughout the experiment. For example the first three trials the water temperature will be at 10 degree celsius and change from 20-30-40-50. When the temperature of the water is changing the dependent variable that's being measured  is then affected causing it to change.

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How does the change in water temperature affect the solubility of sugar?