Chapter 9, Problem 46QAP

### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

Chapter
Section

### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
5 views

# For each of the following unbalanced chemical equations, suppose that exactly 5.00 g of each reactant is taken. Determine which reactant is limiting, and calculate what mass of each product is expected (assuming that the limiting reactant is completely consumed).msp;  S ( s ) + H 2 SO 4 ( a q ) → SO 2 ( g ) + H 2 O ( l ) msp;  MnO 2 ( s ) + H 2 SO 4 ( l ) → Mn ( SO 4 ) 2 ( s ) + H 2 O ( l ) msp;  H 2 S ( g ) + O 2 ( g ) → SO 2 ( g ) + H 2 O ( l ) msp;  AgNO 3 ( a q ) + Al ( s ) → Ag ( s ) + Al ( NO 3 ) 3 ( a q )

Interpretation Introduction

(a)

Interpretation:

Balance the reaction and find the limiting reactant. Then calculate the mass of each product that is expected after the complete consumption of the limiting reactant.

Concept Introduction:

For the given unbalanced equations, the mass of each reactant taken is given. The reaction needs to be balanced and the number of moles of each reactant needs to be calculated and compared to find the limiting reactant. Finally, by comparing the number of moles of the limiting reactant with the number of moles of each product, the number of moles of the product formed after complete reaction can be determined and then the mass of each product can be calculated.

Explanation
 Before 0.1563 0.051 0 0 Change -0.0765 -0.051 0.0765 0.051 After 0.0798 0 0.0765 0.051

3S(s)+2H2SO4(aq)3SO2(g)+2H2O(l)

To find the number of moles of reactants taken:

Relative Atomic Mass of Sulfur = 32g/mol

Moles of Sulfur = 5g32g/mol

= 0.1563mol

Relative Molecular Mass of Sulfuric acid=

(1×2)+(32×1)+(16×4)

= 98g/mol

Moles of Sulfuric acid

= 5g98g/mol

= 0.0510mol

To find the number of moles of reactants used:

As sulfuric acid has the lowest number of moles as shown above, the moles of sulfur ( x ) needed to completely react with sulfuric acid can be calculated using the molar ratio as follows

Interpretation Introduction

(b)

Interpretation:

Balance the reaction and find the limiting reactant. Then calculate the mass of each product that is expected after the complete consumption of the limiting reactant.

Concept Introduction:

For the given unbalanced equations, the mass of each reactant taken is given. The reaction needs to be balanced and the number of moles of each reactant needs to be calculated and compared to find the limiting reactant. Finally by comparing the number of moles of the limiting reactant with the number of moles of each product, the number of moles of the product formed after complete reaction can be determined and then the mass of each product can be calculated.

Interpretation Introduction

(c)

Interpretation:

Balance the reaction and find the limiting reactant. Then calculate the mass of each product that is expected after the complete consumption of the limiting reactant.

Concept Introduction:

For the given unbalanced equations, the mass of each reactant taken is given. The reaction needs to be balanced and the number of moles of each reactant needs to be calculated and compared to find the limiting reactant. Finally by comparing the number of moles of the limiting reactant with the number of moles of each product, the number of moles of the product formed after complete reaction can be determined and then the mass of each product can be calculated.

Interpretation Introduction

(d)

Interpretation:

Balance the reaction and find the limiting reactant. Then calculate the mass of each product that is expected after the complete consumption of the limiting reactant.

Concept Introduction:

For the given unbalanced equations, the mass of each reactant taken is given. The reaction needs to be balanced and the number of moles of each reactant needs to be calculated and compared to find the limiting reactant. Finally, by comparing the number of moles of the limiting reactant with the number of moles of each product, the number of moles of the product formed after complete reaction can be determined and then the mass of each product can be calculated.

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