please help me with honors chemistry solutions question

Question

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

A. 0.18 mol

B. 0.81 mol     

C. 0.27 mol

D. 0.090 mol

E. 0.54 mol

Answer 1

A solution of CoCl₂ dissociates in water to form Co ions and Cl ions.

For every mole of CoCl₂ that dissolves in water, you get one mole of Co²⁺ ions and 2 moles of Cl^1- ions.

So, if you start with 0.27 moles of CoCl₂, you will get 0.27 moles of Co²⁺ ions and 2 x 0.27 = 0.54 moles of Cl^1- ions for a total of 0.81 moles of ions.