I need help with this concentration problem!?

To measure the concentration of PCE, a standard curve or calibration curve was prepared. One calibration solution was prepared at a PCE concentration of 10.00 ppm. The total volume of this calibration solution was 10.00 mL. What volume of a concentrated PCE stock solution at 500 ppm was taken and then diluted to 10.00 mL to prepare this stock solution?

I'm really bad at chemistry like this so any help is much appreciated.

1 Answer

  • 7 years ago
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    Calculating concentration of a chemical solution is a basic skill all students of chemistry must develop early in their studies. What is concentration? Concentration refers to the amount of solute that is dissolved in a solvent. We normally think of a solute as a solid that is added to a solvent (e.g., adding table salt to water), but the solute could just as easily exist in another phase. For example, if we add a small amount of ethanol to water, then the ethanol is the solute and the water is the solvent. If we add a smaller amount of water to a larger amount of ethanol, then the water could be the solute

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