posted by Emma .
Prepare a 0.0200 mM dye solution at low pH by dilution 0.40 ml of the stock 0.100 mM chemical X into the appropriate volume of 2.5 M HCl.
What is the amount of HCL required for dilution, the final concentration of HCl in the solution, and the pH?
I know there's the MV = MV, but I'm not sure how to begin to solve this. The 2.5 M HCl throws me off since there's two concentrations now (2.5 and the .02)
The 2.5 M HCl is the diluting agent and has nothing to do with the calculation for the dye. (Another way of saying it is that the 2.5 M HCl is just water as far as the dye dilution is concerned.). My MV = MV gets 2 mL.
The HCl is 2.5 x (1.6/2.0) = ?? if we assume the volumes are additive.
How were you able to get the 1.6?