What is #K_a# of #"ZnCl"_2# ?

I know its small but what is the exact . Tell me the source too

Answer 1

#2.5 * 10^(-10)#

I was able to find a value for the acid dissociation constant of the #"Zn"^(2+)# cations here

bilbo.chm.uri.edu/CHM112/tables/KaTable.htm

Of course, seeing how #"ZnCl"_2# is a soluble ionic compound and knowing that the chloride anion does not hydrolyze in water, the acid dissociation constant actually belongs to the #"Zn"^(2+)# cations.

You'll possess

#"ZnCl"_ (2(aq)) -> "Zn"_ ((aq))^(2+) + 2"Cl"_ ((aq))^(-)#

then came

#"Zn"_ ((aq))^(2+) + 6"H"_ 2"O"_ ((l)) -> ["Zn"("H"_ 2"O")_ 6]_ ((aq))^(2+)#

additionally

#["Zn"("H"_ 2"O")_ 6]_ ((aq))^(2+) + "H"_ 2"O"_ ((l)) rightleftharpoons ["Zn"("H"_ 2"O")_ 5("OH")]_ ((aq))^(+) + "H"_ 3"O"_ ((aq))^(+)#
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Answer 2

The Ka is nearly #1.936E-8#

The manual is available at https://tutor.hix.ai

In this website I checked that pH of 0.1M of ZnCl2 is 4.4 I tried to solve for Ka (#H^+# = #10^-4.4#) #sqrt(0.1x) = H^+ or 10^-4.4# or #0.1x = 0.000044^2#
#0.1x= 1.936E-9#
#x = Ka = 1.936E-8 = \frac{1.936E-9}{0.1}#

The same answer can be obtained by using the ICE table to solve this.

The Ka is #1.936E-8..# and If you check in this website what is the Ka of Zn(H2O)6 it would be the same . Just they have rounded it off to simpler numbers. These dont matter much
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Answer 3

The Ka of ZnCl2 is not applicable because it is a salt formed from a strong acid (HCl) and a strong base (Zn(OH)2), resulting in a neutral solution. Therefore, it does not undergo significant dissociation in water, and thus, it does not have a Ka value.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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