A voltaic cell is constructed using Hg/Hg+2 for one half-cell and Cr/Cr+3 for the other half-cell. The half-cells are at standard conditions and contain equal-mass electrodes and the same volume of solutions. Reference: Cr+3(aq) + 3 e- ---> Cr(s) E0 = -0.74 V; Hg+2(aq) + 2 e- ---> Hg(l) E0 = +0.80 V

(a) Write the balanced net ionic equation for the spontaneous reaction produced in the cell.

(b) Calculate the value of E0 for the spontaneous reaction.

(c) What is the value of the standard free-energy change, delta G0, for the spontaneous reaction? Use appropriate units with your answer.

(d) If the cell operates until [Cr+3] is 1.09 M in the Cr/Cr+3 half-cell, what is [Hg+2] in the Hg/Hg+2 half-cell?

(e) In another voltaic cell with the same half-cells, [Hg+2] is 1.00 M and [Cr+3] is 0.050 M. How should Ecell for this cell compare to the value in (b)? Justify your answer

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

At 40 âc the solution has at 40 â c the solution has blank g of k n o 3 per 100 g of water and it can contain up to blank g of k n o 3 per 100 g of water. at 0 â c the solubility is ~ blank g k n o 3 per 100 g of water, so ~ blank g k n o 3 per 100 g of water will precipitate out of solution.g of kno3 per 100 g of water and it can contain up to at 40 â c the solution has blank g of k n o 3 per 100 g of water and it can contain up to blank g of k n o 3 per 100 g of water. at 0 â c the solubility is ~ blank g k n o 3 per 100 g of water, so ~ blank g k n o 3 per 100 g of water will precipitate out of solution.g of kno3 per 100 g of water. at 0 âc the solubility is ~ at 40 â c the solution has blank g of k n o 3 per 100 g of water and it can contain up to blank g of k n o 3 per 100 g of water. at 0 â c the solubility is ~ blank g k n o 3 per 100 g of water, so ~ blank g k n o 3 per 100 g of water will precipitate out of solution.kno3 per 100 g of water, so ~ at 40 â c the solution has blank g of k n o 3 per 100 g of water and it can contain up to blank g of k n o 3 per 100 g of water. at 0 â c the solubility is ~ blank g k n o 3 per 100 g of water, so ~ blank g k n o 3 per 100 g of water will precipitate out of solution.gkno3 per 100 g of water will precipitate out of solution. a kno3 solution containing 55 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?