Balance the following redox equation, identifying the element oxidized and the element reduced. show all work to solve the problem. cr2o7 2- + c2h5oh --> cr3 + co2

Explanation:

A redox equation is defined as an equation that shows reduction and oxidation are taking place simultaneously in a chemical reaction.

When electrons are lost in a chemical reaction then it is known as oxidation reaction. Whereas when electrons are gained in a chemical reaction then it is known as a redox reaction.

For example,

Reduction-half reaction:

Oxidation state of Cr in is +6.

Oxidation-half reaction:

Oxidation state of C in is -2 and in oxidation state of C is +4.

Now, to balance the equation multiply reduction-half reaction by 2.

Thus, the combined balanced chemical reaction equation will be as follows.

fdvwsa gfwsargebgeebbfwfwffw gwf   vgwgw gw f gwgw fgw v v dsv dwfff

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