dilution question

[marscole]

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what volume of 18.0 M HCl will you add if you want to prepare 300 mL of 6.0 M of HCl? 😕

thank you!!

 

[Pharmpills]

what volume of 18.0 M HCl will you add if you want to prepare 300 mL of 6.0 M of HCl? 😕

thank you!!

isnt this just m1v1 crap
i think its 100 ml 🙂 18x=300(6)

 

[marscole]

hmm... i was thinking of adding 75 ml of 18.0 M HCl and 225 ml of water to prepare for 300 ml of 6.00 M HCl...😕

 

[joey2007]

Hey no, it doesn't work that way. This equation you will use the M1V1= M2V2...

 

[jntruong2003]

just remember if it gives something like 1 M H2SO4, that you ned to change molarity to normality.

 

[TheWiredNerv]

just remember if it gives something like 1 M H2SO4, that you ned to change molarity to normality.

A way to solve this is to always use N1V1=N2V2 for acids and bases.

 

[joonkimdds]

isnt this just m1v1 crap
i think its 100 ml 🙂 18x=300(6)

It's that crap! LOL.

 

[bigstix808]

just remember if it gives something like 1 M H2SO4, that you ned to change molarity to normality.

no you don't. only if they are asking you about a specific pH or how many moles of H+ are going to react with another species. given the context of the question, you can simply use the M1V1=M2V2 formula. no need to use normality this time.

 

[Pharmpills]

It's that crap! LOL.

yup i was right ans is 100 ml or whatever i put. too lazy to check lol

 

[marscole]

thanks for the help and clarifications.... 🙂