Final answer:
The dilution factor is found by dividing the final volume of the solution after adding water (18 ml) by the initial volume of the NaCl solution (6 ml), resulting in a dilution factor of 3.
Step-by-step explanation:
The question asks about finding the dilution factor when a solution is mixed with water. Given the formula for the dilution factor, which is the final volume divided by the initial volume (Df = Vf/Vi), we can find the dilution factor by adding the initial volume of the NaCl solution (6 ml) to the volume of water it is mixed with (12 ml) to get the final volume. The final volume would therefore be 6 ml + 12 ml = 18 ml. The dilution factor is calculated as the final volume (18 ml) divided by the initial NaCl solution volume (6 ml), giving us a dilution factor of 3 (Df = 18 ml / 6 ml).
The correct answer to the question, 'what is the dilution factor if you mix 6 ml of a NaCl solution with 12 ml of water?' is C) 3.