Which half reaction equation correctly represents a reduction reaction?

a. Li + e- --> Li+

b. Na + e- --> Na+

c. Br2 + 2e- --> 2Br-

d. Cl2 + e- --> 2Cl-

The half-reaction equations that correctly represent a reduction reaction are

c. Br₂ + 2e- --> 2Br-

d. Cl₂ + e- --> 2Cl-

Explanation:

The reduction corresponds to the electron gain of an atom, ion or molecule, that is, it is a reaction in which a substance captures electrons. In other words, there is reduction whenever an atom or group of atoms gains electrons, increasing its negative charges or decreasing the positive ones.   In this way, the oxidation state decreases.

The half-reaction equations that correctly represent a reduction reaction are

c. Br₂ + 2e- --> 2Br-

d. Cl₂ + e- --> 2Cl-

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explanation:

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when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml