Question

Consider again the solution made by diluting 10.0 mL of the 0.50 M NaCl by adding distilled water until 100 mL of solution are produced.

Has the concentration of the diluted salt solution increased, decreased, or remained constant?

Answer 1

every time you add water to a solution the concentration decreases

Answer 2

Decreased

Step-by-step explanation:

Using the dilution equation:

C₁V₁ = C₂V₂

where C₁ and V₁ are concentration and volume before dilution and C₂ and V₂ concentration and volume after dilution

Plugging the numbers we have,

0.5 M x 10 ml = C₂ x 100 ml

C₂ = (0.5 M x 10 ml) / 100 ml = 0.05 M

Therefore, the concentration of the diluted salt solution has decreased.