Chemistry Practice Problems Dilution Practice Problems Solution: The circle below represents 1.0 liter of a solutio...

Solution: The circle below represents 1.0 liter of a solution with a solute concentration of 1 M:Explain what you would add (the amount of solute or volume of solvent) to the solution so as to obtain a solution represented by each of the figures (a) - (c)?

Problem

The circle below represents 1.0 liter of a solution with a solute concentration of 1 M:
A space-filling molecular diagram of a collection of eight isolated purple spheres.

Explain what you would add (the amount of solute or volume of solvent) to the solution so as to obtain a solution represented by each of the figures (a) - (c)? Three space-filling molecular diagrams labeled a, b, and c. Diagram a is a collection of twelve purple spheres. Diagram b is a collection of four purple spheres. Diagram c is a collection of six purple spheres.

Solution

We’re being asked to determine what you would add (solute or solvent) to obtain the following solution 



Recall that molarity is given by:

Molarity = moles of soluteLiters of solution



Our initial solution contains 8 molecules in a 1.0 L solution. Its concentration is 1 M. 

This means 1 mole of solute has 8 molecules.


We will do the following steps to solve the problem:

Step 1: Determine the concentration of the final solution

Step 2: Determine the solute or solvent to be added



For a, 

Step 1: Determine the concentration of the final solution

 


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