3.7 - Solutions & Mixtures

Solutions

Homogeneous mixtures

Homogenous mixtures are composed of

a solute and solvent

True or False: Homogeneous mixtures can be any state of matter.

T

Molarity

number of moles of a solute in one liter of a solution

Symbol for molarity

M

Molarity formula

How to decrease molarity?

Add water/dilute

1st step in preparing a solution

Weigh mass

2nd step in preparing a solution

Add portion of the solvent is added to volumetric flask

3rd step in preparing a solution

mixture is swirled until all of solute is dissolved

4th step in preparing a solution

Add additional solvent until mark is filled in volumetric flask

Dilution is the process of…

decreasing molarity

Dilution equation

M₁V₁= M₂V₂

M₁ in dilution equation

concentration/molarity of original

V₁

amount taken from concentrated solution

M₂

diluted concentration (molarity)

V₂

TOTAL amount of “new” solution