3.7 - Solutions & Mixtures

Solutions are

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

Is air a solution, why?

mix of a bunch of gases

Are alloys solutions? Why?

Uniform mixture, can not see visual composition of metals.

State types of unit for concentration

Formality, molarity, molality, normality, percent by volume, percent by mass