For the reaction, 2cr2+ + cl2(g) > 2cr3+ + 2cl- e cell (standard conditions) = 1.78v calculate ecell (standard conditions) for the related reaction cr3+ + cl- > cr2+ + 1/2cl2(g)
a. 0.89 v
b. - 0.89 v
c. 1.78 v
d. - 1.78 v
e. non of these

-1.78 V

Explanation:

There are several rules required to calculate the cell potential:

given standard cell potential, we may reverse the equation: the products of a given reaction become our reactants, while reactants become our products in the reversed equation. For a reversed equation, we change the sign of the cell potential to the opposite sign;if we multiply the whole equation by some number, this doesn't influence the cell potential value. It only produces a different expression in the equilibrium constant.

That said, notice that the initial reaction with respect to the final reaction is:

reversed: chromium(III) cation and chloride anion become our reactants as opposed to the products in the initial reaction, so we change the sign of the cell potential to a negative value of -1.78 V;each coefficient is multiplied by a fraction of . It doesn't influence the value of the cell potential.

Thus, we have a cell of E = -1.78 V.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.