In relation to the unbalanced reaction represented above, The wrong option. Just

Question

In relation to the unbalanced reaction represented above,
The wrong option. Justify your correct and wrong answers and represent in positive pole and negative pole.

A) It is a reaction with electron transfer between atoms.
B) Nitric acid is the reducing agent.
C) The stoichiometric coefficients of equations 3, 8, 3, 2, 4,
Respectively, meet the requirements of the conservation law
Of the masses.
D) Cu º-------> Cu 2+ + 2 e-   Is the half equation that represents the oxidation
Of 1 mol of metallic copper

Explanation / Answer

ANSWER:

(A) This statement is correct. Because in reactant side the oxidation state of Cu is zero, however on product side the oxidation state of Cu is +2. It confirms that two electrons are lost by Cu. These electrons are gained by HNO3.

(B) Wrong. Cu gets oxidised and the electrons given by Cu reduce HNO3. Hence Cu is reducing agent.

(C) 3Cu + 8HNO3 -------> 3Cu(NO3)2 + 2NO + 4H2O

This statement is correct. Because the number of atoms of different element on reactant side is equal to the number of atoms of the respective elements on product side. It means the total mass of reactants is equal to the total mass of products.

(D) CORRECT. Each mole of Cu gives two moles of electrons.

The pole at which oxidation takes place is called anode. ANODE IS NEGATIVE POLE OF THE CELL. Hence the half-cell with Cu represents the NEGATIVE POLE. And the half-cell with HNO3 represent POSITIVE POLE.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.