![cshopholic4921](/avatars/6084.jpg)
cshopholic4921
01.12.2020 •
Chemistry
519.3 g FeCl3
anyone know the number of moles?
Solved
Show answers
More tips
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
Answers on questions: Chemistry
- C Chemistry 1 C3H8 + 5 O2 -- 3 CO2 + 4H20. If 1.5 moles of C3H8 react, how many moles of CO2 will be produced? * 3.0 moles 4.5 moles 06 moles O 8.0 moles...
- C Chemistry Identifying bacteria . Are part of the carbon oxygen cycle.Absorb oxygen from atmosphere.release nitrogen into the atmosphere.break down nitrogen into ammonia.NO LINKS!...
- C Chemistry What is a likely oxidation state of Chlorine? a)-1 b) 7 C) -7 d) +1...
- C Chemistry Is NaCl dissolved in water physical or chemical?...
- C Chemistry About 55L of a gas in a flexible container is under a pressure of 3.2 atm and at a temperature of 520 K. What is the new volume of the gas if the temperature is raised to 760K and...
- C Chemistry Which hydrogen is an unsaturated hydrocarbon ?...
- M Mathematics Design a method which can be used by a Year 8 student to determine the height of a tree which is in their compound (assume the tree is taller than their house)....
- M Mathematics Find the value of x for arc AB = 38° and arc CD = 25°....
- E English How does Shakespeare use irony and humor to build suspense in Romeo and Juliet? Using RACER Strategy...
- M Mathematics Simplify a - {b-[C- (d - e) - f - g). O a+b+c-d+e-f+g O a-b+ C-d + e-f+g O a+b+c+d+e-f+g O a-b+C-d + e +f-g...
Ответ:
1. E° = 0,62V
2. Ecell = 0,61V
Explanation:
1. It is possible to obtain the E° of a reaction by the sum of the E for the half-reactions, thus:
(1) Cu²⁺(aq) +2e⁻ → Cu(s) E = 0.3419V
(2) 4H⁺(aq) + NO₃⁻(aq) + 3e⁻ → NO(g) + 2H₂O(l) E = 0.96
As the E of (1) is less than E of (2), Cu(s) will be oxidated and the nitrogen will be reduced. That means:
Cu(s) → Cu²⁺(aq) +2e⁻ E = -0.3419V
4H⁺(aq) + NO₃⁻(aq) + 3e⁻ → NO(g) + 2H₂O(l) E = 0.96
The sum of the half-reactions is:
3x [Cu(s) → Cu²⁺(aq) +2e⁻] E = -0.3419V
2x [4H⁺(aq) + NO₃⁻(aq) + 3e⁻ → NO(g) + 2H₂O(l)] E = 0.96
3Cu(s) + 8H⁺(aq) + 6e⁻ + 2NO₃⁻(aq) → 3Cu²⁺(aq) + 2NO(g) + 4H₂O(l) + 6e⁻
E° = -0,3419V + 0,96V = 0,62V
2. Using Nernst equation:
Ecell = E°cell - 0,0591/n log Q
Where E° is 0,62V, n are number of electrons 6e⁻ And Q is: [Cu²⁺]³[NO]²/[H⁺]⁸[NO₃⁻]²
The Ecell is:
Ecell = 0,62V - 0,0591/6 log 3,92
Ecell = 0,61V
I hope it helps!