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Physical and chemical change Flashcards | StudBud
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Physical and chemical change
Physical and chemical change
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Answers
1
What is a solution?
A solute dissolved in a solvent
a solvent dissolved in a solute
a saturation dissolved in a solvent
a solute dissolved in a saturation
2
Physical or chemical change?
iron rusting
Chemical change
Physical change
3
Snowman Melting: Physical or Chemical Change
Physical
Chemical
4
What method would you use to separating some iron nails from sand
Sieving
Magnet
Filtration
Distillation
5
What is the chemical name for rust?
Iron Oxide
Hydrated Iron Oxide
Hydroioxide
Steel Oxide
6
What separating technique do you use to separate salt water?
Evaporation
Chromatography
Filteration
Distillation
7
Separating products of a reaction can be done by ___________ .
filtering
evaporating
filtering and evaporating
neither filtering or evaporating
8
Which of these do NOT rust?
Cast Iron
Iron
Steel
Copper
9
What kind of separating technique is shown in the picture?
filtering
chromatogaphy
decanting
centrifuging
10
A solute has to be soluble
True
False
11
What kind of separating technique is shown in the picture?
homogenisation
evaporation
distillation
crystallisation
12
How could you add more solute to a saturated solution?
increase the temperature of the solute.
decrease the temperature of the solute.
increase the temperature of the solvent.
use the incantation: "dissolvus patronus!"
13
Adding salt to water will create a mixture with a lower freezing point?
False
True
14
Define solution
a amount of solute dissolved in a certain amount of solvent
compound that produce hydroxide ions when dissolved in water
Mix that forms when one substance evenly dissolve in another
a substance that changes color in the presence of a base
15
Baking a Cake: Physical or Chemical Change
Chemical
Physical
16
The formation of rust on iron would be an example of what kind of change?
Gas Change
Physical Change
Voluntary Change
Chemical Change
17
Which of these separating techniques can be used to separate solutions?
Sedimentation
Filtration
Evaporation
Centrifuging
18
when salt is dissolved in water the freezing point will
increase
decrease
won't change
19
Name the method used for separating sand and water.
Distillation
Evaporation
Filtration
Chromatography
20
Painting a Wall: Physical or Chemical Change
Chemical
Physical
21
Name the method used for separating iron filings and sand
Evaporation
Magnetic
Chromatography
Decanting
22
Adding salt to water will cause its freezing point to be ______ 0ºC
None of the above
Same as
Higher than
Lower than
23
saturated
solution contains the maximum quantity
solution contains less than the maximun amount
has least one double bond between carbon atoms
24
are fireworks chemical or physical change?
Chemical change.
Neither.
Physical change.
25
What mechanical ways can be used to remove rust?
Air compressors
Use of grinders
Both of the above
26
What Happens When a Solution Becomes Saturated?
The solvent can no longer dissolve anything
The Mixture becomes Mechanical
The solute can no longer dissolve anything
The solution can no longer dissolve anything
27
Boiling Water: Physical or Chemical Change
Chemical
Physical
28
The freezing point of a mixture of water and salt is
lower than that of pure water
higher than that of pure water
the same as that of pure water
29
A Process that uses evaporation and condensation to separate substances.
Centrifuge
Crystallisation
Filltration
Distillation
30
Rust can always be prevented by paint?
False
True
31
Crushing a Can: Physical or Chemical Change
Chemical
Physical
32
What mixtures can be separated using a coffee filter?
orange juice
sand and water
cereal and pretzels
milk and water
33
What is this method of separating water from ink called?
Chromatography
Dissolving
Filtration
Distillation
34
Process by which substances are changed into different substances with different properties.
Characteristic
Trait
Physical Change
Chemical Change
35
A saturated solution has too much solute so it cannot dissolve it anymore.
False
True
36
A solution is when
You come up with a solution how to save the world
You find out how to cure cancer
Completed a puzzle
A solvent and a solute are mixed and can be seen through
37
Will solute settle to the bottom if you add more solute to a saturated solution?
No
No clue
Yes
It depends
38
Freezing point of water
0 degrees F
32 degrees C
0 degrees C
39
This picture represents what separating technique?
Magnetic Separation
Filtration
Gravity Separation
Sieving
40
A car exposed to moisture for a long period of time is a chemical reaction because it causes the car to rust.
True
False
41
For rust to become present do you need water
and
Oxygen?
False
True
42
How could you add more solute to a saturated solution?
increase the temperature of the solute.
increase the temperature of the solvent.
decrease the temperature of the solute.
use the incantation: "dissolvus patronus!"
43
What is a saturated solution?
Has room to add more solvent
Has no room to dissolve more solute
Has room to dissolve more solute
Has no room to dissolve more solvent
