![brmoen1392](/avatars/21622.jpg)
brmoen1392
12.03.2020 •
Chemistry
What is the value of the van't Hoff factor for KCl if a 1.00m aqueous solution shows a vapor pressure depression of 0.734 mmHg at 298 ∘C? (The vapor pressure of water at 298 K is 23.76 mmHg.)
Solved
Show answers
More tips
- H Health and Medicine What are Electronic Cigarettes? The Ultimate Guide...
- C Computers and Internet How to Get Rid of 3pic Infector: Everything You Need to Know...
- A Auto and Moto Experience the World of the Most Expensive Cars on the Planet...
- S Style and Beauty How to Get Rid of a Double Chin?...
- F Food and Cooking How to Cook Julienne? Recipes and Tips...
- D Dating, Love, Relationships 10 Useful Tips on How to Survive a Breakup?...
- F Food and Cooking Apple Cider Vinegar: The Ultimate Health and Beauty Solution...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
Answers on questions: Chemistry
- C Chemistry If you go to school for 180 days each school and each day is 7 hours long, how many hours are spent in school in one school year?...
- M Mathematics 5xº 120° X = degrees. A...
- M Mathematics An exhaust pipe is shaped like a cylinder with a height of 50 inches and a radius of 2 inches. What is the lateral surface area of the exhaust pipe?...
- C Chemistry What are deltatb and deltatf for an aqueous solution that is 1.5g nacl in 0.250kg h2o? given kb=0.51 c/m and kr=1.86 c/m...
Ответ:
The Van't Hoff factor for KCl is 1.74
Explanation:
We are given:
Molality of solution = 1 m
This means that 1 mole of a solute is present in 1 kg of solvent (water) or 1000 grams of water
To calculate the number of moles, we use the equation:
Given mass of water = 1000 g
Molar mass of water = 18 g/mol
Putting values in above equation, we get:
Mole fraction of a substance is given by:
Moles of solute = 1 moles
Total moles = [1 + 55.56] = 56.56 moles
Putting values in above equation, we get:
The equation used to calculate relative lowering of vapor pressure follows:
where,
i = Van't Hoff factor = ?
Putting values in above equation, we get:
Hence, the Van't Hoff factor for KCl is 1.74
Ответ:
true then false
Step-by-step explanation: