A bottle in lab is labeled [CoCl2.6H2O] = 0.652 M in 8.433 M HCl. If you determine [CoCl42-] to be 0.129 M at a particular temperature using absorbance measurements, what must be the value of [Co(H2O)62+] in the solution at that temperature?

Explanation:

Chemical equation for the given reaction is as follows.

First, we will calculate the moles of as follows.

         = 0.652 mol

Therefore,

       = 0.129 moles of

Now, moles per liter of which will not react will be calculated as follows.

          0.652 - 0.129

         = 0.523

Thus, we can conclude that there are 0.523 moles of present per liter.

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