journal entry: observe the demo of mixing a)baking soda (nahco 3 ) with water (h 2 o) and b) baking...

Journal Entry:Observe the demo of mixing

a) Baking Soda (NaHCO3) with Water (H2O) and b) Baking Soda and Vinegar (CH3COOH).

In a paragraph:1- Give Qualitative Observations for each demo

2- Which combination created a chemical change? Explain3- Which combination was only a physical change?.Explain

L.T: I can observe and distinguish between different

mixtures.

Mixture: two or more different materials, substances or objects mixed together without causing a chemical change. (no new molecules formed)

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L.T: I can observe and distinguish between different

mixtures.

In a mixture, the molecules of the different things do NOT combine!

L.T: I can observe and distinguish between different

mixtures.

Mixtures

Heterogeneous(Het-er-o-jean-us)

Mixture(“Different”)

Homogeneous(Homo-jean-us) Mixture

(“Same”)

Mixture that looks different. (You can see the different ingredients)

Mixture that looks the same. (You can NOT really see the different ingredients)

L.T: I can observe and distinguish between different

mixtures.

Inquiry: What are mixtures?

Physical properties describe many differences between things.

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Color

State of Matter (boiling, melting, freezing point)

Size and Shape

Magnetic/non-magnetic

Conductor of heat and electricity

Mixtures

Air is a mixture of mostly nitrogen (N), oxygen(O) carbon dioxide (CO2). Next >

Other times it is more difficult to see what is in a mixture, like with the air we

breathe.

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Homogeneous Mixture

Heterogeneous Mixture

Dissolving salt in water:It’s hard to tell whether a new substance forms when

salt dissolves in water.What type of mixture is this? Why?

Everything in the mixture looks the same.

Inquiry: What are mixtures?

Rocks are also examples of mixtures. They are mixtures of different minerals.

Are these rocks homogeneous or heterogeneous mixtures?

Inquiry: What are mixtures?

Heterogeneous Mixtures. We can see the different parts

Solutions

Solutions: A mixture when one substance dissolves into another substance.

Solubility: The ability of something to dissolve.

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Inquiry: What are mixtures?

Soluble

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Both sugar and salt are soluble in water.

Sugar is soluble

Salt is soluble

Inquiry: What are mixtures?

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Soluble and Insoluble

You will not be able to see the sugar or salt in a solution …

Taste is a physical property and does not change.… but you will be

able to taste the difference!

A sugar solution tastes sweet

A salt solution

tastes salty

Inquiry: What are mixtures?

Soluble and Insoluble

Insoluble: something that will NOT dissolve.

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Soluble: something that WILL dissolve.

Salt

Complete the Venn diagram using the examples below.

a) Chocolate Milkb) Cereal and Milk

c) Peanut butter and Jellyd) Ice cream with sprinkles

e) Mac and cheesef) Air

g) Soda Heterog.Mix Homog.Mix

Elements: Types of atoms

Br Br Br

Element and MoleculeElement and Atom

Vs.

L.T: I can review the different types of matter

Chemical Vs. Physical

Compound: different atoms bonded together

H Cl

Mixture: Different substances physically

Put together. (NO new molecules)

Heterogenouslooks diff.

Homogeneous:looks the same

Vs.

Solution: madewhen something dissolves into something else

L.T: I can review the different types of matter

Br O

Salt

Solution

L.T: I can review the different types of matter

Homogeneous Mixture

Pure substance vs. Mixture

Pure substance: Substance that is NOT a mixture

Mixture: Different substances physically

Put together. (NO new molecules)

Heterogenouslooks diff.

Homogeneous:looks the same

Vs.

Solution: madewhen something dissolves into something else

L.T: I can review the different types of matter

Substance

Heterog.

Mix

Homog.

Mix

Pure

Sub.

Solution

Elem.

Comp.

Mix.

Lead Metal(Pb)

Table Salt(NaCl)

Kool-AidDrink

VegetableSoup

OxygenGas(O2)

Distilled Water

L.T: I can review the different types of matter.

Substance

Heterog.

Mix

Homog.

Mix

Pure

Sub.

Solution

Elem.

Comp.

Mix.

Concrete

Pure Gold (Au)

Brass Met.(Alloy)

Flat 7-upSoda

Raw egg(cracked)

Air

L.T: I can review the different types of matter.

Substance

Heterog.

Mix

Homog.

Mix

Pure

Sub.

Solution

Elem.

Comp.

Mix.

Pure Iron(Fe)Iron Rust(Fe2O3)

Soil

BakingSoda(NaHCO3)

L.T: I can review the different types of matter.

Inquiry: How can different mixtures be separated?

Journal Entry

1) Draw a CO molecule Vs.2) Draw C and O atoms

C O C O

The 2 different elements are connected, creating a compound.

The chemical formula CO tells us that the atoms are connected.

The 2 different elements are NOT connected.

They are just separate atoms.

Inquiry: How can different mixtures be separated?

In a mixture, the molecules of the different things do NOT combine!

PURE SUBSTANCE (only H2O molecules)

MIXTURE (combination of water and

sugar molecules that are not bonded

Pure Substancewith compounds

Pure Substancewith elementsMixture

Inquiry: How can different mixtures be separated?

Separating Mixtures

Sifting: using a sieve or colander to separate a

mixture based on size.Next >

Sieve

Colander

Inquiry: How can different mixtures be separated?

Sifting

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When the sand and pebbles are separated, they are the same size and color as they were before they were mixed.

Inquiry: How can different mixtures be separated?

Inquiry: How can different mixtures be separated?

Sulfur and Iron Filings

Sulfur and iron filings is a mixture too.

Can you think of one?Next >

You could use a physical property of iron filings and of sulfur to separate them.

Sulfur Iron filings

Inquiry: How can different mixtures be separated?

Sulfur and Iron Filings

Magnetism!

If you move a magnet close to the mixture, it will attract the iron filings.

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The sulfur powder will remain in a pile because it is not magnetic.

Magnetic

Non-magnetic

Inquiry: How can different mixtures be separated?

Sulfur and Iron Filings

Iron filings are magnetic.

Next >

They maintain their magnetic property in the mixture.Iron and sulfur can be separated without breaking bonds.

Inquiry: How can different mixtures be separated?

Inquiry: How can different mixtures be separated?

If you heated this mixture of iron and sulfur a chemical reaction (chemical change) would occur producing iron sulfide.

Fe (s) + S (s) FeS

Iron and Sulfur mixture

Hot Plate

heat

Inquiry: How can different mixtures be separated?

How can we separate a homogeneous mixture solution of salt and water?

Topics for quiz tomorrow

1) Vocabulary (Malleable, Ductile, Luster, Conductor, Insulator, Electricity, Ore, Alloy, Mixture, Heterogeneous Mix, Homogeneous Mix., Solution, Solubility, Soluble, Insoluble, Physical Change, Chemical Change, Reactants, Products, Fusion, Chemical Bond)

2) Metals vs. Non-Metals

3) Physical vs Chemical properties/changes

4) Homogeneous mix. Vs. Heterog. Mixture vs. Pure substance vs Element vs. Compound. Vs. Solution