Please help me solve this and show me how you got the answer? Thank you.

Question

Suppose the molarity of Allura Red in your stock solution is 0.00019 M and you take 5.00 mL of this solution, place it into a 100.00 mL volumetric flask and fill it to the mark with distilled water. What is the concentration of the diluted solution?(dilution)

Answer 1

0.00019 M/l   solution is 1.9x10-4 M/l

 

1000 ml contains 1,9x10-4 M

5ml  contains  5 ml x1.9x10-4 M/1000 ml = 9.5x10-7 M

 

Now we put

9.5x10-7 M of the compound into 100ml than how many moles of the compund is in a 1000ml solution, a dilution of 10 times.

 

(9.5x10-7M * 1000 ml/l )/100 ml  = 9.5x10-6 M/l