A bottle of calcium bromide contains a bromide ion concentration of 0.10 mol/L. What is the concentration of the calcium bromide?

1 Answer
May 30, 2017

Answer:

#[CaBr_2]=0.050*mol*L^-1#

Explanation:

Calcium bromide speciates in aqueous solution according to the following equation.........

#CaBr_2(s) stackrel(H_2O)rarrCa^(2+) + 2Br^-#

And thus for every metal ion there are necessarily two bromide ions.

Here by specification,

#[Br^-]=0.10*mol*L^-1#, and thus #[Ca^(2+)]=1/2xx[Br^-]=1/2xx0.10*mol*L^-1=0.050*mol*L^-1#