To what volume must 10ml of 5M HCl be diluted to make a 0.5M HCl solution......????

A.1ml
B.50ml
C.100ml
D.500ml
E.1000ml

C.100ml

To find the volume to which the 10 ml of 5M HCl solution should be diluted to obtain a 0.5M HCl solution, we can use the dilution formula:

C1V1 = C2V2

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

In this case:
C1 = 5M
V1 = 10ml
C2 = 0.5M

Now we can rearrange the formula to solve for V2:

V2 = (C1 * V1) / C2

V2 = (5M * 10ml) / 0.5M

V2 = 50ml

Therefore, the correct option is B. 50ml.

(Molarity x Volume)conc. = (Molarity) x Volume)dilute

Substitute and solve for Volume of diluted solution.