Question

What mass of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.

Answer 1

91.4 grams mass of KCl is required.

Concentration = moles/Volume

2.45M=mol/0.5L

2.45M⋅0.5L=mol

mol=1.225

Convert no. of moles to grams using the atomic mass of K + Cl

1.225mol⋅(39.1+35.5)/gmol

1.225mol⋅74.6g

mol=1.225⋅74.6g = 91.4g

What is Concentration?

• The formula for determining concentration from moles and volume is pretty straightforward. Simply divide the volume of solution by the moles of solute.
• The number of moles of a component divided by the sum of the moles in the solution is what is known as a mole fraction, which is a unit of concentration.
• Mole fraction is a unit-free expression because it represents a ratio.

To learn more about concentrations, refer to the given link:

https://brainly.com/question/23312431

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