For this problem, we’re being asked to** determine the ****number of Fe (II) ions in 20.0 g ****FeSO**_{4}

Recall that FeSO_{4} dissociates into Fe^{2+} and SO_{4}^{2-} in the reaction:

**FeSO _{4} → Fe^{2+} + SO_{4}**

The reaction tells us that 1 mol of FeSO_{4} gives 1 mol of Fe^{2+} ion and 1 mol of SO_{4}^{2-}

***Recall that Fe (II) is the same as Fe ^{2+}*

If we have 20.00 grams of FeSO_{4},_{ }we can find the number of ions of Fe(II) using molar mass of FeSO_{4}, and stoichiometric relationship from the balanced equation, and Avogadro’s number.

**Recall that Avogadro’s Number** gives us the **number of entities present in 1 mole:**** **

There are** 6.022 × 10**^{23}** Fe (II) ****ions in 1 mole Fe (II)**.

**We will do a ****molecules → moles**** calculation based on ****Avogadro's number **

How many Fe(II) ions are there in 20.00 g of FeSO _{4}?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.

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Based on our data, we think this problem is relevant for Professor Giles' class at VCU.