After putting sucrose, table salt, copper sulfate in the water, why do the solids disappear so quick

When the molecules of the dissolved substance (i.e., solute) interact with the molecules of the dispersion medium (i.e., solvent), if the interaction force between different molecules is greater than that between the same molecules, the solute molecules are separated from the solute, and then diffuse, and finally reach an equilibrium state in the solvent, that is, the dissolution rate of the solute is equal to its crystallization rate. Therefore, it can also be said that the dissolution of a substance is the process of molecular or ionic interaction between solute and solvent, and this interaction force is mainly van der Waals force, hydrogen bonding force and dipole force. As a highly polar solvent, water can dissolve strong electrolytes, weak electrolytes and a large number of polar compounds, such as various hydroxyl compounds, aldehydes and ketones and amine compounds containing oxygen and nitrogen atoms.

In this type of dissolution, water molecules and solutes produce different interaction forces: water molecules can produce ionic-dipole attraction with some strong electrolyte ions; Hydrogen bonds are formed with oxygen or nitrogen atoms in polar solutes; Combined with polar hydroxyl compounds to produce a directional force (van der Waals force). In the same dissolution process, these forces may occur at the same time, or they may be the presence of a single force, and it is actually difficult to distinguish strictly.

In general, the ionic-dipole force is the strongest in these interactions, followed by the hydrogen bonding force, and the directional force is the weakest. So, electrolytes have greater solubility in water. When the polarity of the solvent is weakened, the interaction force of the above-mentioned polar substances in the solvent decreases, and the solubility decreases, for example, some electrolytes are not easily soluble in alcohols with less polarity than water.

On the contrary, if the polarity of the solute is small, for example, when there are non-polar groups such as ester groups, hydrocarbon chains, etc. in the molecule, their solubility in water decreases significantly with the increase of the number of non-polar groups, while there is a greater solubility in solvents such as ethanol and propylene glycol that are weaker than water. Very weak or non-polar solutes may be insoluble or almost insoluble in water and other polar solvents, while in non-polar solvents they have greater solubility, but in this case, the solute and solvent mainly interact with dispersion forces.

It is to dissolve the north. are all solubble. The first two soluble organics, the last soluble salt.

That's wrong. The first one is organic matter. Two or three are the same.

Sucrose is hydrolyzed to form glucose, and glucose and the newly made copper hydroxide suspension are coheated to form a red precipitate.

Answer: d Sucrose is hydrolyzed to produce glucose and fructose; Both starch and cellulose hydrolysis produce only one product, glucose; Methyl formate hydrolysis produces formic acid and methanol, so the answer is term d