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Science > Test 4 > Flashcards

Test 4 Flashcards

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1
Q

Which is soluble in water?

  1. Sugar 2. Sodium Chloride 3. Sulfur
  2. Copper Sulfate 5. Zinc Oxide 6. Sand
  3. Kool Aid Powder
A

Sodium Chloride, Copper Sulfate, Sugar, Kool Aid Powder

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2
Q

What is solubility?

A

Is the amount of solute that a solvent in a given volume

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3
Q

What is solubility affected by?

A

Temperature, pressure, and changing the amount of the solvent.

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4
Q

How does changing the amount of solvent affect the amount of solute that will dissolve?

A

If you increase or decrease the amount of solvent you use, you will decrease or increase the solubility.

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5
Q

How do you determine the solubility of a substance in the lab?

A

Take the mass of the substance you are using. Next take a scoop some of the solute into the solvent and stir. Once the mixture has become saturated take the mass of the container the solute was in. Next subtract the ending and starting mass. Then take that answer and compare it to other substances. Which ever is closer than that is your substance.

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6
Q

Difference between homogenous and heterogeneous

A

Homogenous is a well-mixed solution

Heterogeneous is a non-well-mixed solution.

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7
Q

What are the parts of a solution?

A

Solutions are homogenous mixtures made out of at least one solute and solvent.

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8
Q

How do you know when a solution has become saturated?

A

When the solvent can no longer dissolve the solute.

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9
Q

How can knowing the solubility of a substance help identify one?

A

Solubility is characteristic substance. We can use solubility the find out which substance it is using the periodic table

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10
Q

When is it appropriate to use the filtration technique to separate a mixture?

A

When it is a heterogeneous mixture.

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11
Q

When should you use evaporation to separate a mixture?

A

When the mixture is homogenous

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12
Q

Explain the difference between residue and filtrate

A

The residue is the substance that is left in the filter. The filtrate is the substance that falls into the test tube or beaker.

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13
Q

What is Desalination?

A

The process of removing salt from seawater.

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14
Q

What is a Characteristic Property?

A

A characteristic property is an identifying trait of a substance that helps to identify what a substance is

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15
Q

What are examples of characteristic properties?

A

Density, solubility, melting, and boiling point.

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16
Q

Describe an alloy

A

Alloys are mixtures of solids/metals

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17
Q

Why are they useful? (ALLOY)

A

The are useful because they change the properties of substances they are made from and allow us to create new materials with properties or characteristics that are useful.

18
Q

What happens o the freezing point of water when salt is added?

A

The freezing point decreases/lowers so tat it is harder for the water to freeze again.

19
Q

Why is salt added to the roads in winter?

A

They add salt to the road because salt can lower the freezing point of water so the roads won’t freeze as easily

20
Q

What happens to the boiling point of water when salt is added.

A

Salt increases the boiling point of water making it harder for the water to boil.

21
Q

Soluble

A

Able to dissolve

22
Q

Insoluble

A

Unable to dissolve

23
Q

Mixture

A

A substance made by mixing other substances together

24
Q

Homogenous

A

Well-mixed

25
Q

Heterogeneous

A

Not well-mixed

26
Q

Solvent

A

The substance that dissolves the solute

27
Q

Solute

A

The substance that gets dissolved by the solvent

28
Q

Solution

A

Where the solvent dissolves the solute to make another substance. Which is the solution

29
Q

Dissolve

A

To break away from one substance and evaporate

30
Q

Saturated solution

A

Where the solvent cannot dissolve anymore solute

31
Q

Solubility

A

The amount of solute in a certain volume of the solvent

32
Q

Filtration

A

The process of separating a heterogenous solution using filtrate paper and a funnel

33
Q

Filtrate

A

The substance that goes into the test tube or beaker

34
Q

Residue

A

The substance left behind in the funnel

35
Q

Desalination

A

The process of removing salt from saltwater

36
Q

Evaporation

A

The process of a liquid turning into a gas

37
Q

Freezing point

A

The point where a liquid freezes

38
Q

Boiling point

A

The point where a liquid is heated and starts to boil

39
Q

Alloy

A

Mixture of solids/metals

40
Q

Characteristic Property

A

A identifying trait of a substance that helps identify what a substance is

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