A bacterial stock solution was found to have a density 5.0 x 106 cells. The microbiologist took 1 mL of the stock solution and diluted it to a final volume of 10 mL with the appropriate media. Which of the following statement regarding the dilution is true?

A dilution ratio of 1:10 means ______ml of stock in  20 ml of final volume.

Your solution is 10000 times more dilute than the original bacterial sample (ie 1x10-4). Your take 0.5ml of this solution and add it to 4.5ml saline. Once mixed, 0.5ml of that diluted cell suspension is placed in another tube with 4.5 ml of sterile saline. How many times is the original cell suspension diluted now? (Please type your numerical answer eg 1 or 10 or 100 or 1000 etc)

. A volumetric flask was used to make the diluted solutions in this experiment. If you accidentally filled the flask above the mark.a. Would the concentration of solution be higher or lower than desired? Explain.

You have prepared a 2 M stock solution of an analyte you will be diluting to prepare your standard solutions.  What volume (in mL) will you need to add and dilute in a 250 mL volumetric flask to achieve a final concentration of 0.06 M?  Answer to 1 decimal place (Hint: C1V1=C2V2)

A dilution ration of 1:10 means _______L of stock in 50 L of final volume.