Need Help!! Describe how to make 2.5L of 0.1M HCL solution from 12M HCL concentrated solution and water.

I got help earlier but still could not figure out the calculations. Please help, it has been a while since i took chemistry.

Thank you soo much

C'mon. I showed you how to do this, in fact, I did all but calculate it for you.

M x L = M x L
2.5L x 0.1M = ?L x 12M
?L = 2.5 x 0.1/12 = 0.0208
Take 0.0208 L(20.8 mL of the 12M HCL); place in a 2.5L volumetric flask, add water to the mark. That will give you 2.5L of 0.1M HCl. From your post it is unclear how many significant figures you have; therefore, that is up to you. If that is 2.50L, 0.100M, and 12.0M, then the answer is 20.8 mL.

To make a 2.5L of 0.1M HCl solution from the concentrated 12M HCl solution, you will need to use the dilution formula. The dilution formula is given as:

C1V1 = C2V2

Where:
C1 = initial concentration of the concentrated solution
V1 = volume of the concentrated solution used
C2 = final concentration of the diluted solution
V2 = final volume of the diluted solution

Now, let's calculate the volume of the concentrated HCl solution (V1) required to make the desired 2.5L of 0.1M HCl solution.

Rearranging the formula, we can calculate V1:

V1 = (C2 * V2) / C1

Given:
C1 = 12M (concentration of the concentrated solution)
C2 = 0.1M (concentration of the diluted solution)
V2 = 2.5L (final volume of the diluted solution)

Substituting the given values into the formula:

V1 = (0.1M * 2.5L) / 12M

V1 = 0.021L

So, you will need 0.021L (or 21mL) of the concentrated 12M HCl solution.

To prepare the desired 0.1M HCl solution, follow these steps:

1. Measure 21mL (or 0.021L) of the 12M HCl concentrated solution using a graduated cylinder or a pipette.
2. Add the measured 21mL of the 12M HCl solution to a clean, empty container.
3. Gradually add distilled water to the container, while stirring gently, until the total volume reaches 2.5L.
4. Ensure complete mixing of the dilute solution to ensure uniform concentration throughout.

Note: For safety, always add acid to water while making dilutions, and wear appropriate protective clothing and eyewear when handling concentrated acids.