Calculate Molarity of 0.342M Sugar Solution

  • Thread starter Thread starter fidypomi
  • Start date Start date
  • Tags Tags
    Molarity
Click For Summary
To calculate the molality of a 0.342M sugar solution with a density of 1.12g/mL, first determine the mass of the solution per liter, which is 1120g. Then, calculate the grams of sugar in that volume using the molarity, which gives approximately 42.5g of sugar (C12H22O11). Convert the mass of the solution to kilograms, yielding 1.12kg. Finally, divide the moles of sugar by the mass of the solution in kilograms to find the molality, resulting in approximately 0.341m. Understanding the relationship between molarity and molality is crucial for solving this problem.
fidypomi
Messages
1
Reaction score
0
Here is the problem..

Calculate the molarity of a 0.342M sugar (C12H22O11) solution that has a density of 1.12g/mL.

The answer is 0.341m but I don't know the steps..

Please help me with this problem :(
 
Physics news on Phys.org
You probably asked for "Molarity" when you meant to ask for "Molality".
Starting with your 0.342 moles per liter of sugar solution, use the formula weight to find GRAMS of sugar per liter of solution. You need to calculate the formula weight of the compound from the empirical formula. Can you do the rest?
 
fidypomi said:
Here is the problem..

Calculate the molarity of a 0.342M sugar (C12H22O11) solution that has a density of 1.12g/mL.

The answer is 0.341m but I don't know the steps..

Please help me with this problem :(

The bolded thing is the abbreviation for molarity. I assume that the question actually asked you to solve for the molality (moles per Kg of solution).

Can you see that the density of the solution will be helpful? If each mL of solution weighs 1.12 g, how much will 1000 mL weigh? And how much sugar will be in that 1000 mL (or liter)?
 

Similar threads

Chemistry Calculating Molar Solubility of CaCO3: A Puzzling Problem
  • · Replies 7 ·
Replies
7
Views
5K
What Is the Molarity of Potassium Ions in a Potassium Sulfite Solution?
  • · Replies 2 ·
Replies
2
Views
4K
Chemistry Calculating the Mass of a Precipitate
  • · Replies 14 ·
Replies
14
Views
12K
Chemistry How to Calculate Mole Fractions and Molar Volume in a Thermodynamic System?
  • · Replies 2 ·
Replies
2
Views
3K
Density of Solution and mass percent
  • · Replies 17 ·
Replies
17
Views
5K
Chemistry How does this example of electroplating tungsten onto base metal work?
  • · Replies 5 ·
Replies
5
Views
1K
What is the Importance of Choosing the Correct Endpoint in a Titration?
  • · Replies 7 ·
Replies
7
Views
5K
Concentration from density and purity
  • · Replies 3 ·
Replies
3
Views
4K
Chemistry How Do You Measure the Density and Sugar Content of 7-Up?
  • · Replies 14 ·
Replies
14
Views
3K
Chemistry Finding the molecular formula of an unknown hydrocarbon
  • · Replies 4 ·
Replies
4
Views
3K