How many milliliters of 4.50 M HCl must be diluted to make 400. mL of a 0.500 M solution?

mL1 x M1 = mL2 x M2

? mL1 x 4.50 = 400 mL x 0.500
? mL1 = ?

How many mililiters of 8.00 M HCL must be diluted to make 500. mL of a 0.500 M solution?

0.007

To find out how many milliliters of 4.50 M HCl must be diluted to make 400 mL of a 0.500 M solution, we can use the equation:

(C1V1) = (C2V2)

where:
C1 = initial concentration of HCl solution
V1 = initial volume of HCl solution
C2 = final concentration of HCl solution
V2 = final volume of HCl solution

In this case, we know:
C1 = 4.50 M
V1 = ? (what we need to find)
C2 = 0.500 M
V2 = 400 mL

We can rearrange the equation to solve for V1:

V1 = (C2V2) / C1

Plugging in the values:

V1 = (0.500 M * 400 mL) / 4.50 M

V1 = (200 mL) / 4.50

V1 ≈ 44.44 mL

Therefore, approximately 44.44 milliliters of 4.50 M HCl must be diluted to make 400 mL of a 0.500 M solution.