Chegg Write the balanced half-reactions for the following oxidation-reduction reaction that occurs in acid solution. Determine the number of electrons that appears in the balanced half reactions. Number of electrons

Reduction half-reaction: Cr₂O₇²- (aq) + 14H+ (aq) + 6e- > 2Cr³+ (aq) + 7 H₂O (l)

Oxidation half-reaction: 6 Cl- (aq) ---> 3 Cl₂ (g) + 6e-

Number of electrons = 6 electrons

Note: The question is incomplete. A similar but complete question is given below :

Write the balanced half-reactions for the following oxidation-reduction reaction that occurs in acid solution. Determine the number of electrons that appears in the balanced half reactions.

Cr₂0₇²- (aq) + CI- (aq) ---> Cr³+ (aq) + Cl₂(g)

Number of electrons =

Explanation:

A redox reaction is a reaction in which both oxidation and reduction occur simultaneously and to to the same extent.

Oxidation involves a loss of electron by atom of an element while reduction involve a gain of electrons.

A redox reaction can be split into two half-reaction; a reduction half-reaction andan oxidation half-reaction. The half-reactions in the given redox reaction is balanced as follows below:

Reduction half-reaction: Cr⁶+ being reduced to Cr³+

Cr₂O₇²- (aq) ---> Cr³+ (aq)

Since the reaction takes place in acidic medium, H+ and H₂O is added to the left and right-hand side of the equation respectively in order to balance the atoms

Cr₂O₇²- (aq) + 14H+ (aq) > 2Cr³+ (aq) + 7 H₂O (l)

Since 3 electrons are gained by Cr⁶+ in being reduced to Cr³+, 2 molecules of Cr⁶+ will accept 3 electrons each to give a total of 6 electrons

Cr₂O₇²- (aq) + 14H+ (aq) + 6e- > 2Cr³+ (aq) + 7 H₂O (l)

Oxidation half-reaction: Cl- ions are oxidized to Cl₂

Cl- (aq) ---> Cl₂

Two Cl- will each lose an electron to form Cl₂. Since the number of electrons gained in the reduction half-reaction is six, six electrons must be lost here as well. Therefore, the electrons involved and the number of moles of atoms involved are balanced as follows:

6 Cl- (aq) ---> 3 Cl₂ (g) + 6e-

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

the correct answer to this question is 2