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DigiCalcs

כיצד לחשב את Molarity

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Molarity (M) is the concentration of a solution, defined as the number of moles of solute dissolved per litre of solution. It is the most commonly used unit of concentration in chemistry.

מדריך שלב אחר שלב

  1. 1Count moles of solute (mass / molar mass)
  2. 2Measure volume of solution in litres
  3. 3Molarity M = moles / litres
  4. 4To prepare a solution: weigh moles × molar mass of solute, dissolve, transfer to volumetric flask, add solvent to the mark

Worked Examples

קלט
5.85g NaCl (M=58.5) in 500ml water
תוצאה
0.2 M NaCl solution
moles=0.1; 0.1/0.5=0.2M
קלט
0.5 mol/L × 2L
תוצאה
1.0 mol solute needed
n = M × V

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