salt, baking soda, water, sugar oxygen, iron, hydrogen, gold matter mixture pure substance...

salt, baking soda, water, sugar

oxygen, iron, hydrogen, gold

Matter

MixturePure

Substance

ElementsCompoundsHeterogeneous

MixtureHomogeneou

s Mixture

separate physically

cannot separate physically

separate chemically

cannot separate

Chemicalchanges

Physicalchanges

(solutions)

filtering

distillation(boiling)

(uneven, differences) NaCl NaHCO3

H2O C12H22O11

O2 FeH2 Au

differences or unevenly

mixed

uniform or evenly mixed

Pure SubstancesElement:

-only one type of atom

-simplest form of matter retaining its properties

Examples:Carbon (C)Helium (He)Gold (Au)

(cannot be separated) (chemically or physically)

Pure Substances

Compound:

different elements chemically bonded together

Examples:Carbon Dioxide (CO2)Water (H2O)Salt (NaCl)Sucrose (C12H22O11)

(can be separated… chemically)

Sodium is a highly reactive metal stored in oil.

Cl2 (element)Chlorine kills organisms in pools.

It’s also a poisonous green gas.

completely new substance with completely new

properties

NaCl(compound)

Na (element)

Compound:can be separated… chemically into…

H2O(liquid)

O2(gas)

H2(gas)

Hoffman apparatus

elements …which can… NOT.

Mixtures

Homogeneous Mixture:

physically mixed evenly…it looks the same throughout

lemonadeSteel (Fe + C + Cr)NaCl + H2O salt water

distillation

(boiling)

(Solution)

Examples:Copper (Cu) and Zinc (Zn) make brass.

physically separated by _____________.

Mixtures

Heterogeneous Mixture:

physically mixed unevenly…can see the different parts

Examples: SandGraniteWood

2 Types:Suspensions & Colloids

Separation (Group Discussion)

Sand + Iron (Fe) + Salt (NaCl) is a(n)______________________ that can be separated by …heterogeneous mixture

Physically:-pulling out Fe with magnetPhysically:-dissolving NaCl in water-filtering sand out-evaporating the water

Chemically:-decomposing NaCl with electricity into Na and Cl

1. Passing an electric current through a substance produces oxygen and sulfur.This substance cannot be a(n)

A. compound.B. mixture.C. element.D. solution.

Quick Quiz!

Quick Quiz.

2. Which of the following is a mixture?

A. sodium chloride (NaCl)

B. carbon dioxide (CO2)

C. sucrose (sugar, C12H22O11)

D. air (N2, O2, CO2, H2, Ar, …)

Quick Quiz.

3. A blue-green solid is decomposed by heating.

A colorless gas and a black solid appear.

The blue-green solid must have been a(n)

A. heterogeneous mixture

B. homogeneous mixture

C. compound

D. element

+

salt, baking soda, sugar, water

oxygen, iron, hydrogen, gold

Matter

____________

Substance

________________________geneous

Mixture_____geneous

Mixture

separate physically

________ separate physically

_________ _______

separate chemically

cannot separate

________changes

________changes

(________)

filtering

distillation(boiling)

(uneven, differences) NaCl NaHCO3

H2O C12H22O11

O2 FeH2 Au