Question

Підібрати коефіціенти способом електронного балансу. 1). Al+HNO3- AL(NO3)3+N2+H2O (ЧЕРТОЧКА ОБОЗНАЧАЕТ СТРЕЛКУ В ПРАВО) 2). Fe+ H2SO4-Fe2(SO4)3 + SO2 +H2O

Answer 1

Al - 3e = Al(3+) 
2HNO3 + 10e = N2 

 

10 Al + 36 HNO3 = 10 Al(NO3)3 + 3N2 + 18 H2O

 

Fe^0 - 3e ------> Fe^3+ I x2
SO4^2- + 4H^+ + 2e -------> SO2+ 2H2O I x3
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2Fe^0 + 3SO4^2- + 12H^+ -------->2 Fe^3+ + 3SO2+ 6H2O

2Fe+ 6H2SO4------> Fe2(SO4)3+3SO2+6H2O

 

 

Answer 2

Balancing Chemical Equations:

To balance the given chemical equations using the method of electronic balancing, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Here's how we can balance the given equations:

1) Al + HNO3 → Al(NO3)3 + N2 + H2O

To balance this equation, we can follow these steps:

Step 1: Count the number of atoms of each element on both sides of the equation.

| Element | Left Side | Right Side | |---------|-----------|------------| | Al | 1 | 1 | | H | 1 | 4 | | N | 1 | 3 | | O | 3 | 3 |

Step 2: Start with the most complex molecule or polyatomic ion. In this case, it is Al(NO3)3.

Step 3: Balance the atoms in Al(NO3)3. Since there are three nitrate ions (NO3-) on the right side, we need three nitrate ions on the left side as well. This gives us:

Al + 3HNO3 → Al(NO3)3 + N2 + H2O

Step 4: Balance the remaining elements. We can balance hydrogen by adding 6H+ on the left side:

Al + 3HNO3 + 6H+ → Al(NO3)3 + N2 + H2O

Step 5: Balance the charge. Since there are six positive charges on the left side and three positive charges on the right side, we can balance the charge by adding 3e- (electrons) on the left side:

Al + 3HNO3 + 6H+ + 3e- → Al(NO3)3 + N2 + H2O

Step 6: Verify that all the elements and charges are balanced:

| Element | Left Side | Right Side | |---------|-----------|------------| | Al | 1 | 1 | | H | 7 | 7 | | N | 3 | 3 | | O | 9 | 9 | | Charge | +3 | +3 |

Therefore, the balanced equation is:

Al + 3HNO3 + 6H+ + 3e- → Al(NO3)3 + N2 + H2O [[1]]

2) Fe + H2SO4 → Fe2(SO4)3 + SO2 + H2O

To balance this equation, we can follow these steps:

Step 1: Count the number of atoms of each element on both sides of the equation.

| Element | Left Side | Right Side | |---------|-----------|------------| | Fe | 1 | 2 | | H | 2 | 4 | | S | 1 | 4 | | O | 4 | 12 |

Step 2: Start with the most complex molecule or polyatomic ion. In this case, it is Fe2(SO4)3.

Step 3: Balance the atoms in Fe2(SO4)3. Since there are three sulfate ions (SO4^2-) on the right side, we need three sulfate ions on the left side as well. This gives us:

Fe + 3H2SO4 → Fe2(SO4)3 + SO2 + H2O

Step 4: Balance the remaining elements. We can balance hydrogen by adding 6H+ on the left side:

Fe + 3H2SO4 + 6H+ → Fe2(SO4)3 + SO2 + H2O

Step 5: Balance the charge. Since there are six positive charges on the left side and three positive charges on the right side, we can balance the charge by adding 3e- (electrons) on the left side:

Fe + 3H2SO4 + 6H+ + 3e- → Fe2(SO4)3 + SO2 + H2O

Step 6: Verify that all the elements and charges are balanced:

| Element | Left Side | Right Side | |---------|-----------|------------| | Fe | 2 | 2 | | H | 8 | 8 | | S | 3 | 3 | | O | 12 | 12 | | Charge | +3 | +3 |

Therefore, the balanced equation is:

Fe + 3H2SO4 + 6H+ + 3e- → Fe2(SO4)3 + SO2 + H2O [[2]]

Please note that the balanced equations provided above are based on the information available in the search results.