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Kinetics help

http://filestore.aqa.org.uk/subjects/AQA-CHEM2-QP-JAN13.PDF

Q1aiii

the MS said to penalise reference to Hydrochloric acid Molecules can anyone help me understand why please?

if concentration is doubled then the number of HCl molecules in a given volume is also doubled?

the MS allows " Twice / double as much hydrochloric acid " . Whats the difference between that and what I wrote

http://filestore.aqa.org.uk/subjects/AQA-CHEM2-W-MS-JAN13.PDF


Thanks
Reply 1
Avatar for Pigster
Pigster
20
HCl(aq) is not molecular, it is fully ionised - it is a strong acid!
Original post by Pigster
HCl(aq) is not molecular, it is fully ionised - it is a strong acid!


FML

because its a solution of H+ and Cl- ions righttttt? NOt a molecule. i will bear in this in mind should AQA ask this type of question again. thanksss



just to check - hydrogen chloride is molecular righttt? ( i know its nothing to do with the q , just wanted to check)
Reply 3
Avatar for Pigster
Pigster
20
Fix my lighthouse?

HCl(g) is a molecule.

Dissolve it in water and you'll get HCl(aq).

Pretty much instantly that'll turn into H+(aq) + Cl-(aq).
Original post by Pigster
Fix my lighthouse?

HCl(g) is a molecule.

Dissolve it in water and you'll get HCl(aq).

Pretty much instantly that'll turn into H+(aq) + Cl-(aq).


thanks!

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