Question

When the compound, Ca(NO3)2, is mixed with water, the Ca(NO3)2 is:

soluble because all Ca+2 compounds are soluble in water

insoluble because most Ca+2 compounds are insoluble in water

soluble because all NO3−1 compounds are soluble in water

insoluble because NO3−1 compounds are usually insoluble in water

Answer 1

soluble because all NO3 - compounds are soluble in water

Answer 2

when writing ions, it is written in the following form:

\[Ca ^{2+}\]

and not

\[Ca ^{+2}\]

2+ is the charge of the calcium ion. +2 is the oxidation state of calcium.

Answer 3

http://yeahchemistry.com/sites/default/files/generalsolubilityrules.gif