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3 years ago

4. A. What is the percent by mass of water present in CoCl2.6H20? B. Name the hydrate.

Chemistry

1 answer:

romanna [79]3 years ago

8 0

52.17%

using periodic table.. We get the molar mass respectively for C, O, Cl and H20 . You get an answer as 207 by adding all of them . Then as we have 6 water molecules and we get 108 . so we have to divide 108 and 207 then multiply the decimal with 100 . we get 52.17%

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The given question is incomplete. The complete question is as follows.

Sodium sulfate is slowly added to a solution containing 0.0500 M $Ca^{2+}(aq)$ and 0.0390 M $Ag^{+}(aq)$ . What will be the concentration of $Ca^{2+}$ (aq) when $Ag_{2}SO_{4}(s)$ begins to precipitate? What percentage of the $Ca^{2+}(aq)$ can be separated from the Ag(aq) by selective precipitation?

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