Consentration question(basic chemistry)

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Discussion Overview

The discussion revolves around calculating the concentration of a potassium chloride (KCl) solution, specifically focusing on the amount of solute dissolved in a given volume of solvent. The scope includes basic chemistry concepts related to concentration and molarity.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant presents a problem involving dissolving 3.576 grams of KCl in water to make a 200 mL solution and asks for the concentration.
  • Another participant emphasizes the definition of concentration, suggesting it can be measured in various units such as moles per liter or grams per mL, and encourages the original poster to think through the problem.
  • A participant expresses familiarity with calculating the number of moles from the given mass of KCl but is uncertain about the volume of the solution.
  • There is a reiteration of the ability to calculate moles per liter, with a suggestion that this leads to calculating molarity.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the calculation process, as there is uncertainty regarding the volume of the solution and how it relates to the concentration calculation.

Contextual Notes

There is a lack of clarity on the specific definitions and assumptions regarding the volume of the solution and how it affects the concentration calculation.

Who May Find This Useful

This discussion may be useful for students learning about solution concentration and molarity in basic chemistry.

transgalactic
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we desolve 3.576 gr of KCL in water
and complement the volume to 200ml
what is the concentration of the solution??
 
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Do you understand what concentration actually is? It measures the amount of ssomething in some volume. You could measure it in moles per litre, grams per mL etc. Think about what it means and see if you can try to solve it yourself.
 
i know how to calculate the number of moles in 3.576 gr of KCL
but i don't know what's the volume of that in the solution?

i could calculate the number of moles per litter
 
transgalactic said:
i know how to calculate the number of moles in 3.576 gr of KCL
but i don't know what's the volume of that in the solution?

i could calculate the number of moles per litter

Good! Then you can calculate Molarity, which is moles of solute in 1 liter of solution.
 

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