Question

substance a and substance b are mixed together. to separate the mixture, water is added, and substance a is filtered out. then, the remaining liquid is heated to remove the water, leaving substance b. which statement about substance a and substance b could be correct? (1 point)
o substance a is salt and substance b is also salt.
o substance a is sodium and substance b is chloride; they had reacted together as sodium chloride.
o substance a is alcohol, and substance b is salt.
o substance a is rice, and substance b is sugar.

Explanation:

When substances are mixed and water - added, followed by filtration and evaporation steps as described, we need to consider solubility. Salt is soluble in water while rice is not. Alcohol is a liquid and not separated in the described way. Sodium and chloride react to form sodium chloride but this is not relevant to the separation process described. Sugar is soluble in water like salt. The separation process of adding water, filtering, and evaporating water is consistent with one substance being insoluble (like rice) and the other being soluble (like sugar).

Answer:

Substance A is rice, and substance B is sugar.