Chemistry 2 dilution problem

In summary, to obtain a 3.5 M HCl solution, you will need to add 2.5 liters of 2M HCl to 5 liters of 6 M HCl, resulting in a final solution volume of 7.5 liters with a total of 25 moles of HCl.
  • #1
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Homework Statement


How much 2M HCl do you have to add to 5 liters of 6 M HCl, to obtain a 3.5 M HCl solution?

The Attempt at a Solution


I initially thought of something like m1v1=m2v2, but that doesn't seem to really work in this case :/?
 
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  • #2
How many moles of HCl do you need in the target solution when finished, and how much volume must it be?

Let V = volume of 2M HCl to add. Final solution volume to make is V+5 liters.
Moles of HCl in final prepared solution are 2*V + 6*5 moles.

Analyze the situation and construct the needed equation and solve.
 

1. What is a dilution problem in chemistry?

A dilution problem in chemistry involves changing the concentration of a solution by adding more solvent. The goal is to create a solution with a specific concentration that is different from the original concentration.

2. How do you calculate dilution in chemistry?

Dilution in chemistry is calculated using the formula C1V1 = C2V2, where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

3. What is the purpose of a dilution problem in chemistry?

The purpose of a dilution problem in chemistry is to create a solution with a desired concentration for a specific experiment or application. It is also used to reduce the concentration of a solution that may be too strong for a particular use.

4. What are the units of measurement for dilution in chemistry?

In chemistry, dilution is typically measured in units of molarity (M), which is moles per liter (mol/L). It can also be measured in other units, such as parts per million (ppm) or percentage (%).

5. What factors can affect the accuracy of a dilution problem in chemistry?

There are several factors that can affect the accuracy of a dilution problem in chemistry, including human error in measuring volumes, contaminations in the solutions, and changes in temperature or pressure during the dilution process.

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