Final answer:
Sugar cubes, or sugar-free rebels as they were referred to due to a typo, cannot be created in a blender, which is meant for mixing substances, not for molding them. These cubes would not be stored above water due to their hygroscopic nature leading to moisture absorption and dissolution. When mixed with water, sugar becomes invisible in the solution, unlike iron filings in flour which remain visible.
Step-by-step explanation:
Storing Sugar Cubes
Whether sugar-free rebels, also known as sugar cubes, can be made in a blender is a question related to the physical properties of sugar and the mechanical action of a blender. The term 'sugar-free rebels' seems to be a typographical error, and the correct term should be sugar cubes. Blenders are designed to mix and break down substances, so if the question is referring to mixing sugar substitutes to create a homogeneous mixture, it is indeed possible. However, typical sugar cubes would not be created in a blender as they require a process of molding and drying to form their shape.
Regarding the storage of sugar cubes in a bowl placed in a dish of water, it is not advisable to store them this way. Sugar is hygroscopic, meaning it absorbs moisture, and if placed above water, the cubes would likely absorb the moisture and lose their shape, turning into a syrupy solution.
This is because sugar has a high solubility in water. Therefore, storing sucrose (table sugar) in such a condition would result in dissolution. A hypothetical diagram showing sugar being stored in such a manner would depict the sugar losing its cubical shape and forming a solution with the water over time.
In instances where no activation energy is necessary to break down sucrose, such as in the presence of water, sucrose would not remain in its solid form and hence could not be stored in a sugar bowl for an extended period. To visualize this, we need to think about the solubility of sugar in water and how it dissolves when in contact with moisture.
When considering the visibility of sugar in water, it's important to understand that sugar dissolves completely and therefore becomes invisible in the solution. As opposed to iron filings in flour, which remain distinct and visible, dissolved sugar cannot be seen. The concept behind this visibility is related to solubility and miscibility of substances in a solvent such as water. This concept is also illustrated by DIY experiments such as making ice cream at home using plastic bags, ice, and a few basic ingredients, where the changes in the state of substances can be observed.