how many grams of solute are needed to make 2.50 liters of a 0.100 m soultion of kcl?

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03-05-2018
Chemistry

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how many grams of solute are needed to make 2.50 liters of a 0.100 m soultion of kcl?

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mkryukova19 mkryukova19 · Answer 1 · 2018-05-03T04:59:47+02:00

mkryukova19 mkryukova19

03-05-2018

Molarity =number of mole solute/volume (L) solution.
volume (L) solution = 2.50 L
Molarity= 0.100 M KCl

0.100 M KCl =number of mole solute/2.50 L solution

number of mole solute(KCl)= 0.100 M KCl*2.50 L =0.100*2.50 (mol/L)*L =
=0.250 mol KCl

mass (solute) KCl = Molar mass KCl* number of mole solute(KCl)

Molar mass KCl = 39.1+35.5= 74.6 g/mol

0.250 mol KCl * 74.6 g/mol KCl = 18.7 g KCl

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