College

We appreciate your visit to Sulfur and fluorine react to form sulfur hexafluoride S s 3F 2 g rightarrow SF 6 g If 50 0 g of sulfur S is. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

Sulfur and fluorine react to form sulfur hexafluoride:

\[ S(s) + 3F_2(g) \rightarrow SF_6(g) \]

If 50.0 g of sulfur (S) is allowed to react as completely as possible with 105.0 g of fluorine gas (\( F_2 \)), what mass of the excess reactant is left?

A. 20.5 g S
B. 45.7 g \( F_2 \)
C. 15.0 g S
D. 36.3 g \( F_2 \)

Answer :

The mass of excess reactant is 72.94 g F2.

Here's how to solve the problem:

1. **Calculate the moles of each reactant:**

* Moles of S = Mass of S / Molar mass of S

= 50.0 g / 32.07 g/mol

= 1.559 mol (round to 4 significant figures)

* Moles of F2 = Mass of F2 / Molar mass of F2

= 105.0 g / 38.00 g/mol

= 2.763 mol (round to 4 significant figures)

2. **Determine the limiting reactant:**

According to the balanced equation, 1 mole of S reacts with 3 moles of F2.

* Ratio of S to F2: 1.559 mol S / 2.763 mol F2 ≈ 0.57 / 1

* Since the ratio of S to F2 is less than the stoichiometric ratio (1:3), **S is the limiting reactant**.

3. **Calculate the amount of F2 consumed by the limiting reactant (S):**

* Moles of F2 consumed = Moles of S * Stoichiometric ratio of F2 to S

= 1.559 mol S * 3 mol F2 / 1 mol S

= 4.677 mol F2 (round to 4 significant figures)

4. **Calculate the moles of excess F2:**

* Moles of excess F2 = Initial moles of F2 - Moles of F2 consumed

= 2.763 mol F2 - 4.677 mol F2

= -1.914 mol F2 (negative value indicates excess)

5. **Convert moles of excess F2 to mass:**

* Mass of excess F2 = Moles of excess F2 * Molar mass of F2

= -1.914 mol F2 * 38.00 g/mol

= -72.94 g F2 (round to 3 significant figures)

**Therefore, the mass of excess reactant is 72.94 g F2.

Thanks for taking the time to read Sulfur and fluorine react to form sulfur hexafluoride S s 3F 2 g rightarrow SF 6 g If 50 0 g of sulfur S is. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada