Question

Explain what changes and what stays the same when 1.00 L of a solution of NaCl is diluted to 1.80 L.

a) The number of moles of solute stays the same, and the concentration decreases.
b) The number of moles of solute increases, and the concentration stays the same.
c) The number of moles of solute increases, and the concentration increases.
d) The number of moles of solute stays the same, and the concentration stays the same.

Answer 1

In the process of dilution, the number of moles of solute stays the same, while the solution volume increases, resulting in a decrease in concentration.

Step-by-step explanation:

In the process of dilution, the number of moles of solute stays the same, while the solution volume increases. This means that the concentration of the solution decreases.