Question

3 fill in the blanks to complete the sentences. not all answer choices will be used. depending on the weather, it can take days or weeks for water to evaporate from a salt pan. as water evaporates, the concentration of salt in the salt pan. decreases increases stays the same

Explanation:

Step1: Understand the concept of concentration

Concentration is the amount of solute (salt) per unit volume of solution (water + salt).

Step2: Analyze the effect of evaporation

As water (the solvent) evaporates, the volume of the solution decreases. The amount of salt (solute) remains the same.
Using the formula for concentration \(C=\frac{m}{V}\) (where \(m\) is mass of solute and \(V\) is volume of solution), when \(V\) decreases and \(m\) is constant, \(C\) increases.

Answer:

increases