You begin with 10 ml of 2% acetic acid, and you add 90 ml of water. We will call the resulting solution "dilution#1". What is its concentration?
You then repeat the dilution exactly, using 10ml of Dilution #1, adding 90 ml of water. We will call the resulting solution "Dilution #2". What's it concentration?
You then repeat the dilution exactly, using 10 ml of Dilution #1, adding 90 ml of water. We will call the resulting solution "Dilution#3" What's it concentration?
WHat is this progression called?