Question

How much of a stock (18.5 M) HCl solution would be required to make 100mL of 0.025 M HCl?

Answer 1

you want to dilute it 18.5/.025 times or 740 times. That means, 1 part stock, 739 parts water. What is one part? 100ml/740= .135ml

That will be tough to measure.