Final answer:
To prepare a 30 ml of 1:4000 solution, you'll need to calculate the amount of solute needed.
Step-by-step explanation:
To prepare a 1:4000 solution, we need to know the ratio between the amount of solute and the amount of solvent. In this case, the ratio is 1 part solute to 4000 parts solvent. To determine the amount of solute, we can set up a proportion using the given information. Since we want to prepare a 30 ml solution, we can let the amount of solute be x:
(1 / 4000) = x / 30
Now, we can solve for x:
x = (1 / 4000) * 30