Balance the following reaction- As2S5 - HNO3 - H3AsO4 - H2SO4 - NO2

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Introduction to Oxidation and Reduction

Balance the f...

Question

Balance the following reaction.
$A s_{2} S_{5} + H N O_{3} \to H_{3} A s O_{4} + H_{2} S O_{4} + N O_{2}$

A s_{2} S_{5} + 40 H N O_{3} \to 5 H_{2} S O_{4} + 40 N O_{2} + 2 H_{3} A s O_{4} + 12 H_{2} O

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A s_{2} S_{5} + 15 H N O_{3} \to H_{2} S O_{4} + 10 N O_{2} + 2 H_{3} A s O_{4} + 12 H_{2} O

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A s_{2} S_{5} + 25 H N O_{3} \to 5 H_{2} S O_{4} + 20 N O_{2} + 2 H_{3} A s O_{4} + 12 H_{2} O

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None of these

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Solution

The correct option is A $A s_{2} S_{5} + 40 H N O_{3} \to 5 H_{2} S O_{4} + 40 N O_{2} + 2 H_{3} A s O_{4} + 12 H_{2} O$
The unbalanced redox equation is as follows:
$A s_{2} S_{5} + H N O_{3} \to H_{3} A s O_{4} + H_{2} S O_{4} + N O_{2}$
Balance all atoms other than H and O.
$A s_{2} S_{5} + H N O_{3} \to 2 H_{3} A s O_{4} + 5 H_{2} S O_{4} + N O_{2}$
The oxidation number of S changes from -2 to 6. The change in the oxidation number of one S is 8.
total change in the oxidation number for 5 S atoms is 40.
The oxidation number of N changes from 5 to 4. The change in the oxidation number of N is 1.
The increase in the oxidation number is balanced with decrease in the oxidation number by multiplying
$H N O_{3}$ and $N O_{2}$ with 40.
$A s_{2} S_{5} + 40 H N O_{3} \to 2 H_{3} A s O_{4} + 5 H_{2} S O_{4} + 40 N O_{2}$
O atoms are balanced by adding 12 water molecules on RHS. Hydrogen atoms are balanced.
$A s_{2} S_{5} + 40 H N O_{3} \to 5 H_{2} S O_{4} + 40 N O_{2} + 2 H_{3} A s O_{4} + 12 H_{2} O$
This is the balanced chemical equation.

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Similar questions

Q. Balance the following equation.

A s_{2} S_{5} + H N O_{3} \to H_{3} A s O_{4} + H_{2} S O_{4} + N O_{2} + H_{2} O

Q. Which of the following statements is/are correct in the following reaction.

A s_{2} S_{5} + N O_{3}^{⊝} \to A s O_{4}^{3 -} + N O_{2} + S O_{4}^{2 -}

Question 27
Which of the following equations is the summary of photosynthesis?

(a) $6 C O_{2} + 12 H_{2} O \to C_{6} H_{12} O_{6} + 6 O_{2} + 6 H_{2} O$
(b) $6 C O_{2} + H_{2} O + S u n l i g h t \to C_{6} H_{12} O_{6} + O_{2} + 6 H_{2} O$
(c) $6 C O_{2} + 12 H_{2} O + C h l o r o p h y l l + S u n l i g h t \to C_{6} H_{12} O_{6} + 6 O_{2} + 6 H_{2} O$
(d) $6 C O_{2} + 12 H_{2} O + C h l o r o p h y l l + S u n l i g h t \to C_{6} H_{12} O_{6} + 6 C O_{2} + 6 H_{2} O$

A l_{4} C_{3} + 12 H_{2} O \to 3 C H_{4} +

_______

Q. If the empirical formula of potash alum is

K A l (S O_{4})_{x}, 12 H_{2} O

, then the value of 'x' in

K A l (S O_{4})_{x}, 12 H_{2} O

is:

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Balance the following reaction.As2S5+HNO3→H3AsO4+H2SO4+NO2

Balance the following reaction.
$A s_{2} S_{5} + H N O_{3} \to H_{3} A s O_{4} + H_{2} S O_{4} + N O_{2}$