Cl- and F-

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Meachelle_Lum_1I
Posts: 92
Joined: Fri Sep 28, 2018 12:24 am

Cl- and F-

Postby Meachelle_Lum_1I » Fri Dec 07, 2018 6:25 pm

Why is it that Cl- does nothing when dissolved in water but F- has the potential to gain a proton and become HF?

Andre_Galenchik_2L
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

Re: Cl- and F-

Postby Andre_Galenchik_2L » Fri Dec 07, 2018 6:50 pm

As HCl is a strong acid, it will stay dissociated as H+ and Cl- (an acid is stronger the more likely it dissociates and releases a H+). On the other hand, as HF is a weak acid, it will more likely go back into HF as it does not like to be in its dissociated form of H+ and F-.

Gabriela Aguilar 4H
Posts: 30
Joined: Fri Sep 28, 2018 12:29 am

Re: Cl- and F-

Postby Gabriela Aguilar 4H » Fri Dec 07, 2018 7:26 pm

HCL when disassociated it does so completely which makes it a strong acid because it won't go back with the H+ and therefore is able to donate the proton. On the other hand, HF will disassociate but not completely and therefore will go back with H+ making a weak acid because it is harder to take away the proton from it.

Joaquin Andrade
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Re: Cl- and F-

Postby Joaquin Andrade » Fri Dec 07, 2018 10:42 pm

Since HCL is a strong acid, it will stay dissociated in water. This is also true for HBr and HI.

Claudia Luong 4K
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Cl- and F-

Postby Claudia Luong 4K » Sat Dec 08, 2018 8:36 am

Strong acids completely dissociate. HCl would completely dissociate into H+ and Cl- ions and therefore won't be able to turn back into HCl while HF is a weaker acid, so it doesn't completely dissociate. Since HF doesn't completely dissociate, F- has the ability to pick up a proton/hydrogen and become HF


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