Calculate NaCl Concentration after Dilution

  • Thread starter neoking77
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In summary, to calculate the concentration of NaCl after dilution, you need to know the initial concentration, initial and final volumes, and use the formula C1V1 = C2V2. The unit of concentration for NaCl is typically expressed in g/L or mol/L. To convert between these units, you need to know the molar mass of NaCl and use the conversion factor 1 g/L = 1/58.44 mol/L. Any volume units can be used in the concentration formula as long as they are consistent. Calculating NaCl concentration after dilution is important in various scientific experiments and processes to accurately measure and adjust the concentration for desired results.
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neoking77
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Homework Statement


Addition of 2uL of 50mM NaCl to a 30 uL reaction gives a final NaCl concentration of ______ M.


Homework Equations





The Attempt at a Solution



so because you add 2uL to 30uL, the dilution is (2 / 2+30) = 1/16
Then I multiplied the dilution with the concentration for the new concentration
1/16 x 50mM = 3.125 mM

Finally, I converted the mM back to M
3.125 mM (1mol / 1000mmol)
answer = 3.125 x 10^-3M

does this look ok?

thank you in advance
 
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  • #2
Looks good.
 
  • #3



Yes, your solution looks correct. The final NaCl concentration after dilution would be 3.125 x 10^-3 M. However, it would be helpful to include the units in your final answer to make it clear that it is in molarity (M). Additionally, it is always a good idea to double check your calculations and units to ensure accuracy. Great job!
 

Related to Calculate NaCl Concentration after Dilution

1. How do I calculate the concentration of NaCl after dilution?

To calculate the concentration of NaCl after dilution, you need to know the initial concentration of NaCl, the volume of the initial solution, and the volume of the final solution. You can use the following 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.

2. What is the unit of concentration for NaCl?

The unit of concentration for NaCl is usually expressed in grams per liter (g/L) or moles per liter (mol/L).

3. How do I convert between grams per liter and moles per liter?

To convert between grams per liter and moles per liter, you need to know the molar mass of NaCl, which is 58.44 g/mol. You can use the following conversion factor: 1 g/L = 1/58.44 mol/L. So, to convert from g/L to mol/L, divide the concentration in g/L by 58.44. And to convert from mol/L to g/L, multiply the concentration in mol/L by 58.44.

4. Can I use any volume units in the concentration formula?

Yes, you can use any volume units in the concentration formula as long as the units for the initial and final volumes are the same. For example, you can use milliliters (mL) or liters (L) for both volumes, but you cannot use mL for the initial volume and L for the final volume.

5. What is the significance of calculating NaCl concentration after dilution?

Calculating NaCl concentration after dilution is important in many scientific experiments and processes, such as in chemistry, biology, and medicine. It allows you to accurately measure the amount of a substance in a solution and make necessary adjustments to achieve the desired concentration. This information is crucial in determining the effectiveness of a solution and ensuring the safety and accuracy of experiments and procedures.

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