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Strong Acids : Particle Dissociation

Discussion in 'MCAT Study Question Q&A' started by Winterbourne, May 12, 2014.

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  1. Winterbourne

    Winterbourne

    44
    4
    May 7, 2014
    Hi! I am looking at a review question about HCl.

    "The molar mass of HCl is 36.5g/mol. Therefore, 73 g would be 2.0 moles, but since it is a strong acid, you would get 4.0 moles of particles (in water). "

    Can someone please explain the italicized part to me? Two moles of HCl gives off 2 moles of H+ ions. So what is this "4.0 moles of particles?"

    Thank you.
     
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  3. Sammy1024

    Sammy1024

    701
    58
    Dec 12, 2013
    Strong acids completely dissociate in water so you would get 2 mol H+ and 2 mol Cl-. Thus 4 mol of oarticles.
     
    Winterbourne likes this.
  4. Winterbourne

    Winterbourne

    44
    4
    May 7, 2014

    Thanks! I feel so silly that I didn't think of this. It is so obvious now. I've been doing questions all day….. UGH! Can I erase this post :oops:
     
  5. Sammy1024

    Sammy1024

    701
    58
    Dec 12, 2013
    Hahahah it's okay! You can only improve from here! :]]]
     

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