Calculating Molar Concentration of Diluted HCl Solution

[fish]

If 25 mL of 12 M HCl are added to 475 mL of distilled water, what is the molar concentration of the diluted hydrochloric acid?

c1v1=c2v2
25*12=475c
c=.63 M HCL

book has the answer as .60 M HCL
Isn't the answer .63?

 

[Bystander]

"25*12=475c"

Think about this a moment; you've asserted something different from the problem statement, "25 mL of 12 M HCl are added to 475 mL ---."

 

[GCT]

Your total volume is 500ml, and you have 12 moles. 12moles/.500L is?

 

[fish]

this seems to work, .30 mol/.500L = .60 M

 

[himanshu121]

Originally posted by GeneralChemTutor
Your total volume is 500ml, and you have 12 moles. 12moles/.500L is?

No u have 12/40=0.3 moles
and now volume is 500mL

therefore molarity= 0.3*2=0.60

it is right way fish