A student wants to make serial dilution of a sample. She starts with a 1mg/ml sample and 10 tubes, (labelled 1-10) each containing 2 ml buffer.
The student puts 1ml of sample solution into tube 1 Repeating the process.
What is the concentration of the sample in tube 4?
Give your answer to 2 decimal places and in µg/ml
I've started this question and I assume I would do 1/2^4 which would give me 0.0625
But i'm stuck if this is right?