Answer:
The Emf of the given cell at [Fe2+] = 2.0 M and [Fe3+] = 1.9 M is 0.48 V
Explanation:
The half cell reaction can be written as :
Anode-Half (oxidation) :
......E = 0.77 V
(multiply this equation by 4 to balance the electrons)
Cathode-half (reduction)
....E= 1.23 V
According to Nernst Equation
n = number of electron transferred in the cell reaction = 4
The balanced equation is :
Insert the value of log Q in Nernst Equation:
(using :
)
<h3>
Answer:</h3>
48.95% (m/v)
<h3>
Explanation:</h3>
From the question we are given;
- Mass of solute, NaCl is 186 g
- Volume of the solvent, water as 3.80 L or 380 mL
We are required to calculate the mass volume percent of solution;
How do we calculate the mass volume percent of a solution?
- To calculate the mass volume percent, we use the formula,
Mass volume percent = (mass of solute in g/Volume of solvent in mL) 100
= (186 g ÷ 380 mL)100
= 48.95%
Therefore, the mass volume percent of a NaCl solution is 48.95% (m/v).
Answer:
We assume you are converting between moles Copper and gram. You can view more details on each measurement unit: molecular weight of Copper or grams.
The reactants are higher in energy than the products