Journal Entry : Observe the demo of mixing Baking Soda (NaHCO 3 ) with Water (H 2 O) and
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Transcript of Journal Entry : Observe the demo of mixing Baking Soda (NaHCO 3 ) with Water (H 2 O) and
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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.
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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.
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In a mixture, the molecules of the different things do NOT combine!
L.T: I can observe and distinguish between different mixtures.
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MixturesHeterogeneous(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.
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Inquiry: What are mixtures?
Physical properties describe many differences between things.
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ColorState of Matter (boiling, melting, freezing point)
Size and Shape
Magnetic/non-magnetic
Conductor of heat and electricity
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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?
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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
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SolutionsSolutions: A mixture when one substance
dissolves into another substance.
Solubility: The ability of something to dissolve.
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Inquiry: What are mixtures?
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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?
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Soluble and InsolubleInsoluble: something that will NOT dissolve.
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Soluble: something that WILL dissolve.
Salt
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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
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Elements: Types of atoms
Br Br Br
Element and MoleculeElement and Atom
Vs.
L.T: I can review the different types of matter
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Chemical Vs. PhysicalCompound:
different atoms bonded together
H Cl
Mixture: Different substances physically
Put together. (NO new molecules) Heterogenouslooks diff.
Homogeneous:looks the sameVs.
Solution: madewhen something dissolves into something else
L.T: I can review the different types of matter
Br O
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SaltSolution
L.T: I can review the different types of matter
Homogeneous Mixture
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Pure substance vs. MixturePure substance:
Substance that is NOT a mixtureMixture:
Different substances physicallyPut together. (NO new molecules)
Heterogenouslooks diff.
Homogeneous:looks the sameVs.
Solution: madewhen something dissolves into something else
L.T: I can review the different types of matter
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Substance
Heterog.
Mix
Homog.
Mix
Pure
Sub.
Solution
Elem.
Comp.
Mix.
Lead Metal(Pb)Table Salt(NaCl)Kool-AidDrinkVegetableSoupOxygenGas(O2)Distilled Water
L.T: I can review the different types of matter.
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Substance
Heterog.
Mix
Homog.
Mix
Pure
Sub.
Solution
Elem.
Comp.
Mix.
Concrete
Pure Gold (Au)Brass Met.(Alloy)Flat 7-upSodaRaw egg(cracked)Air
L.T: I can review the different types of matter.
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Substance
Heterog.
Mix
Homog.
Mix
Pure
Sub.
Solution
Elem.
Comp.
Mix.
Pure Iron(Fe)Iron Rust(Fe2O3)
SoilBakingSoda(NaHCO3)
L.T: I can review the different types of matter.
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Inquiry: How can different mixtures be separated?
Journal Entry1) 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.
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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
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Pure Substancewith compounds
Pure Substancewith elementsMixture
Inquiry: How can different mixtures be separated?
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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?
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Sifting
Next >
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?
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Inquiry: How can different mixtures be separated?
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Sulfur and Iron FilingsSulfur 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?
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Sulfur and Iron FilingsMagnetism!
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?
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Sulfur and Iron Filings
Iron filings are magnetic.
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They maintain their magnetic property in the mixture.Iron and sulfur can be separated without breaking bonds.
Inquiry: How can different mixtures be separated?
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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
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Inquiry: How can different mixtures be separated?
How can we separate a homogeneous mixture solution of salt and water?
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Topics for quiz tomorrow1) 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-Metals3) Physical vs Chemical properties/changes4) Homogeneous mix. Vs. Heterog. Mixture vs. Pure
substance vs Element vs. Compound. Vs. Solution