Calculate the number of ions present in 8.2 moles of calcium nitrate

1.48 * 10²⁵ Ions

Solution:

Calcium Nitrate having a chemical formula Ca (NO₃) ₂ is made up of one Ca²⁺ cation and two NO₃⁻ anions. Hence, we can say that each Calcium Nitrate contains three ions respectively.

Therefore,

1 mole of Ca (NO₃) ₂ contains = 6.022 * 10²³ formula Units

So,

8.2 mole of Ca (NO₃) ₂ will contain = X Formula Units

Solving for X,

X = (8.2 mol * 6.022 * 10²³ formula units) : 1 mol

X = 4.93 * 10²⁴ Formula Units

As discussed,

1 Formula Unit of Ca (NO₃) ₂ contains = 3 Ions

So,

4.93 * 10²⁴ Formula units will contain = X ions

Solving for X,

X = (4.93 * 10²⁴ Formula Unit * 3 Ions) : 1 Formula Unit

X = 1.48 * 10²⁵ Ions