Hello,
Can anyone explain why KCl and LiClO4 are neutral salts?
Thank you!
Achieve HW #7
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Re: Achieve HW #7
Hi,
To get your answer you have to look at the reactants (the acids and bases) to get the product (the salt). For KCl, the reactants would be KOH and HCl, they are strong bases and acids respectively. Whenever you have a strong base and acid, the resulting salt would be neutral. For LiClO4, the reactants would be LiOH and HClO4; the same rules as KCl apply.
I hope this helps!
To get your answer you have to look at the reactants (the acids and bases) to get the product (the salt). For KCl, the reactants would be KOH and HCl, they are strong bases and acids respectively. Whenever you have a strong base and acid, the resulting salt would be neutral. For LiClO4, the reactants would be LiOH and HClO4; the same rules as KCl apply.
I hope this helps!
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Re: Achieve HW #7
So I should memorize the strong acids and strong bases, and anything that isn't on that list is a weak acid/base? Or is there a way to know the strong acid / base without memorizing?
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Re: Achieve HW #7
Hi, so focus on the cation and anion in the ionic compound. In regards to KCl, K+ is a group 1 metal which means that it is neutral. Cl- is part of a strong acid (HCl), which also means that this anion is neutral. Thus this compound is neutral.
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Re: Achieve HW #7
KCl is a neutral salt because both K+ is the conjugate acid of a strong base and Cl- is the conjugate base of a strong acid. Therefore, when the salt is put in solution, the ions remain dissociated. No weak acids or bases are formed, so the solution stays neutral. This same explanation applies for LiClO4 too!
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Re: Achieve HW #7
Hi, these compounds contain both a cation of a strong base and an anion of a strong acid, this will make the solution neutral.
Re: Achieve HW #7
Aida Fraser 2I wrote:So I should memorize the strong acids and strong bases, and anything that isn't on that list is a weak acid/base? Or is there a way to know the strong acid / base without memorizing?
There are only 7 strong acids and 8 strong bases. I would recommend memorizing them for the final.
Strong acids:
HCl (hydrochloric acid)
HNO3 (nitric acid)
H2SO4 (sulfuric acid)
HBr (hydrobromic acid)
HI (hydroiodic acid)
HClO3 (chloric acid)
HClO4 (perchloric acid)
Strong bases:
LiOH (lithium hydroxide)
NaOH (sodium hydroxide)
KOH (potassium hydroxide)
Ca(OH)2 (calcium hydroxide)
RbOH (rubidium hydroxide)
Sr(OH)2 (strontium hydroxide)
CsOH (cesium hydroxide)
Ba(OH)2 (barium hydroxide)
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Re: Achieve HW #7
jackie-2B wrote:Aida Fraser 2I wrote:So I should memorize the strong acids and strong bases, and anything that isn't on that list is a weak acid/base? Or is there a way to know the strong acid / base without memorizing?
There are only 7 strong acids and 8 strong bases. I would recommend memorizing them for the final.
Strong acids:
HCl (hydrochloric acid)
HNO3 (nitric acid)
H2SO4 (sulfuric acid)
HBr (hydrobromic acid)
HI (hydroiodic acid)
HClO3 (chloric acid)
HClO4 (perchloric acid)
Strong bases:
LiOH (lithium hydroxide)
NaOH (sodium hydroxide)
KOH (potassium hydroxide)
Ca(OH)2 (calcium hydroxide)
RbOH (rubidium hydroxide)
Sr(OH)2 (strontium hydroxide)
CsOH (cesium hydroxide)
Ba(OH)2 (barium hydroxide)
thank you so much!
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Re: Achieve HW #7
Hi! KCl is a neutral salt because the parent base of K+ is a strong base (KOH) and the parent acid of Cl- is a strong acid (HCl). Strong base + strong acid = neutral salt. LiClO4 is a neutral salt because the parent base of Li+ is a strong base (LiOH) and the parent acid of ClO4- is a strong acid (HClO4). Strong base + strong acid = neutral salt. Hope this helps!
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