What is the concentration of HCl in the final solution when 65 mL of a 12 mol L^-1 HCl(aq)solution is diluted with pure water to a total volume of 0.15 L? A)2.8 × 10^-² mol L^-1 B)5.2 mol L^-1 C)28 mol L^-1 D)5.2 × 10³ mol L^-1

Question

Quizplus · Accepted Answer

To find the concentration of HCl in the final solution, we need to use the formula:

M1V1 = M2V2

M1 = initial concentration of HCl = 12 mol/L 
V1 = initial volume of HCl = 65 mL = 0.065 L 
V2 = final volume of solution = 0.15 L 
M2 = final concentration of HCl (what we're solving for)

Rearranging the formula:

M2 = (M1V1) / V2 
M2 = (12 mol/L)(0.065 L) / 0.15 L 
M2 = 5.2 mol/L

Therefore, the concentration of HCl in the final solution is 5.2 mol/L, which corresponds to answer choice B.

What Is the Concentration of HCl in the Final Solution