## owlet one year ago Strong, weak, or nonelectrolyte? how will I know? propyl amine, potassium iodide and carbonic acid, what kind of electrolyte are they?

1. owlet

@aaronq @Vocaloid

2. owlet

@Photon336 @Shalante

3. anonymous

write these all out as chemical compounds first

4. owlet

ok.. propyl amine: $$CH_3CH_2CH_2NH_2$$ potassium iodide: KI and carbonic acid: $$H_2CO_3$$

5. owlet

then..?

6. owlet

I think KI is a strong electrolyte.. because of K+ and I-

7. Photon336

@owlet electrolytes usually produce ions in solution

8. anonymous

Im not too sure about propyl amine, but if you look at it's structure you know that $$\sf CH_3CH_2CH_2\mathbf{NH_2}$$ have hydrogen bonds, and hydrogen bonds take a lot of energy to break. You are right about $$\sf KI$$, therefore it's a strong electrolyte because it has an ionic bond, and ionic bonds are soluble in water. for Carbonic Acid, $$\sf H_2CO_3$$, ask yourself whether it's a strong acid, if it's a strong acid, then it's a strong electrolyte

9. Photon336

I think acids are also considered electrolytes. and their strength depends on how many H+ ions are produced.

10. anonymous

for acids and bases, the strength of their electrolytes depends on whether theyre a strong acid, or a strong base

11. owlet

okay.. just wanted to confirm.. if a substance is a strong acid/base then they are strong electrolytes?

12. Photon336

yeah, because that means more ions are produced

13. anonymous

Acetate, $$\sf HC_2H_3O_2$$ is a weak electrolyte compared to let's say... nitric acid, $$\sf HNO_3$$

14. owlet

what about organic compounds, like glucose? they have H bonds also..?

15. Photon336

|dw:1443922500887:dw| @owlet question to you is that compound above hexane would that be considered an electrolyte?

16. Photon336

and why?

17. owlet

i think it is nonelectrolyte because.. it doesn't ionize in water..?

18. Photon336

yep @owlet another one, which one is a better electrolyte and why? |dw:1443922689755:dw|

19. owlet

I'm not sure about that one

20. owlet

both of them will ionize, aren't they?

21. Photon336

=]

22. owlet

acetic acid is a strong acid, so it should be the one i think

23. Photon336

what does acidic strength mean? and how does this relate to electrolyte strength?

24. owlet

hmm acidic strength has something to do with loosing H+ ? it is related to electrolyte strength because i think.. if the acid is strong, it will ionize completely(loose all H+) .. i don't know anymore

25. owlet

but acetic acid and sulfuric acid are both strong acids though??

26. Photon336

yep strong acid will produce more H+

27. Photon336

@owlet acetic acid is a weak acid, sulfuric acid is a strong acid

28. Photon336

so based off of this which would be the better electrolyte?

29. owlet

ohh so it is sulfuric acid? quick question.... i know this may sound dumb.. but why is acetic acid a weak one?

30. Photon336

yep =]

31. Photon336

well because it loses some of it's protons, not all. have you heard of something called Ka, acid dissociation constant. NOT pKA $HA --> H ^{+} + A ^{-} | Ka = \frac{ [H ^{+}][A ^{-}] }{ [KA] }$

32. owlet

yeah I remember doing that. I completely forgot everything, that's why I'm revising everything :3

33. Photon336

so @owlet would a strong acid have a High Ka or low, and how could you tell this from looking at the equation?

34. owlet

They should have a high Ka. The larger the Ka, the larger the [H+] ?

35. owlet

If [H+] is high, then it means the acid can donate more?

36. Photon336

=] yep

37. Photon336

like unfortunately, I was told in my chem classes to just memorize that H2SO4 is a strong acid, I don't like that but that's what I was told lol. but it's a strong acid b/c it's Ka is high. which means it's pKA meaning -log[Ka] will be small.

38. owlet

yes! ok i think i'm getting it now.. yeah same thing, we have to like memorize a table of strong & weak acids and bases before doing the solving part. Probably that's the reason why forgot everything lol let me try another substance.. carbonic acid... will it be weak?

39. Photon336

In my classes they taught me that well yeah, These are your strong acids H2SO4 HNO3 HCL HBr HI H3PO4 i think i'm missing one. everything else is weak

40. owlet

41. Photon336

that's a weak acid

42. owlet

oh yeah one more thing, before i closed this question.. how about alcohols also?

43. Photon336

F- i think is very unstable and it's going to react readily

44. Photon336

I'm not too sure about alcohols but I think they would be weak electrolytes

45. Photon336

at least in water though could be different

46. owlet

F is super negative so it will attach to H+ more than the other group 17 i think, so probably it is weak.. hmm okay, i will try to read more to find out about alcohols. Thanks a lot for the help! :)

47. Photon336

no problem

48. anonymous

$$\color{#0cbb34}{\text{Originally Posted by}}$$ @Photon336 In my classes they taught me that well yeah, These are your strong acids H2SO4 HNO3 HCL HBr HI H3PO4 i think i'm missing one. everything else is weak $$\color{#0cbb34}{\text{End of Quote}}$$ You were pissing perchloric acid i believe, $$\sf HClO_4$$

49. anonymous

$$\sf H_3PO_4$$ is a weak acid :P

50. Photon336

this is what happens when you just memorize stuff, I always forget one of them BTW how do you quote lol? @Jhannybean

51. anonymous

Ohh Jaynator has a script you add to chrome for OS that allows you quote, and post images in the drawing tool as well as use different colors when drawing things as well. I'll have to find the link to the script, or you can ask Nnesha :P

52. Photon336

if you find it please send that to me!

53. anonymous

sure thing!

54. owlet

since you guys are still here.... HNO2 vs.HNO3, which is a stronger one? HNO3 right?

55. owlet

nvm, got it