Chem Lab - Concentration

In summary, concentration in a chemistry lab refers to the amount of a substance present in a given volume of solution, typically measured in moles per liter or molarity. It can be measured using methods such as titration, spectrophotometry, or gravimetric analysis. Concentration and dilution are opposite processes, with concentration increasing the amount of a substance in a solution and dilution decreasing it. Concentration is important in a chemistry lab as it affects the properties and behavior of a solution, and can be changed by adding or removing solute, changing the volume, or performing calculations.
  • #1
decamij
53
0
How could i (mathematically) show what the concentration of IO3- in the following solution?

15mL of 0.20mol/L IO3- solution
5mL of water
 
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  • #2
[tex](15mL)\times\frac{1L}{1000mL}\times\frac{0.20mol~IO_{3}^{-}}{L}=\mbox{moles of the ion in the solution}[/tex]

You know the new volume. Can you find the concentration?
 
Last edited:
  • #3


To mathematically show the concentration of IO3- in this solution, we can use the formula for dilution: C1V1 = C2V2. In this case, C1 is the initial concentration of the IO3- solution (0.20 mol/L), V1 is the initial volume (15 mL), C2 is the final concentration (unknown), and V2 is the final volume (20 mL, since 15 mL of the initial solution is mixed with 5 mL of water). Rearranging the formula, we get C2 = (C1V1)/V2 = (0.20 mol/L * 15 mL) / 20 mL = 0.15 mol/L. Therefore, the concentration of IO3- in this solution is 0.15 mol/L.
 

1. What is concentration in a chemistry lab?

Concentration in a chemistry lab refers to the amount of a substance that is present in a given volume of a solution. It is usually expressed in units of moles per liter (mol/L) or molarity (M).

2. How is concentration measured in a chemistry lab?

Concentration can be measured in a chemistry lab using various methods, such as titration, spectrophotometry, or gravimetric analysis. These methods involve determining the amount of a substance present in a given volume of a solution.

3. What is the difference between concentration and dilution?

Concentration and dilution are opposite processes. Concentration involves increasing the amount of a substance in a given volume of solution, while dilution involves decreasing the amount of a substance in a given volume of solution.

4. Why is concentration important in a chemistry lab?

Concentration is important in a chemistry lab because it affects the properties and behavior of a solution. It can impact reaction rates, solubility, and the accuracy of experimental results.

5. How can concentration be changed in a chemistry lab?

Concentration can be changed in a chemistry lab by adding or removing solute from a solution, changing the volume of the solution, or by performing dilution or concentration calculations to achieve a desired concentration.

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