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Mixtures Answers

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Which is a property of every mixture?

A
One substance dissolves in another substance.
B
The molecules of one substance break down in the other.
C
Different samples of a single mixture have different characteristics.
D
One substance can be separated from another through physical means.
2
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Which material is the least likely to be recognized as a mixture by looking at it under a microscope?

A
a suspension
B
a colloid
C
a homogeneous mixture
D
a heterogeneous mixture
3

Which is a characteristic of colloids?

A
are homogeneous mixtures
B
have large dispersed particles
C
will settle out over time
D
are made up of at least two substances
4

Which is a property of every heterogeneous mixture?

A
The mixture is made up of at least two different states.
B
The mixture is made up of something dissolved in a liquid.
C
The composition of the mixture is the same throughout.
D
The characteristics of the mixture change within a sample.
5

Which would most likely form a homogeneous mixture?

A
10 marbles mixed with 10 small balls
B
a pinch of sugar mixed with a cup of water
C
a pile of big rocks mixed with a bag of sand
D
1 cup of peas mixed with 1 cup of carrots
6

Otis watches a cooking show on making mayonnaise. The chef dissolves salt and sugar in vinegar. She mixes in an egg yolk, and then mixes in oil until the ingredients are completely blended together. The chef says that it’s great on sandwiches and that it can be stored without separating.Which best describes the purpose of the egg yolk in the recipe?

A
It allows the oil to change from liquid to a gas in order to form bubbles.
B
It acts to hold the vinegar and oil together in a colloid.
C
It helps the vinegar be able to form a solution with the salt and sugar.
D
It mixes with both the vinegar and oil to form a suspension.
7

Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions.Which is the best analysis of Eli’s statement?

A
It is correct because each ion is a pure substance, so sodium phosphate is made up of two pure substances.
B
It is correct because the composition of sodium phosphate changes depending on the sample.
C
It is incorrect because sodium phosphate is a compound that has a single composition.
D
It is incorrect because the two types of ions in sodium phosphate cannot be seen.
8

Which will settle out if allowed to sit on a table?

A
a suspension
B
a colloid
C
a solution
D
a compound
9

Which substance gets broken down in a homogeneous mixture?

A
colloid
B
solution
C
solute
D
solvent
10

Fog is composed of water droplets in air. Which term describes fog?

A
solution
B
colloid
C
suspension
D
solvent
11

Which material is the least likely to be recognized as a mixture by looking at it under a microscope?

A
a suspension
B
a colloid
C
a homogeneous mixture
D
a heterogeneous mixture
12

Which is a property of every heterogeneous mixture?

A
The mixture is made up of at least two different states.
B
The mixture is made up of something dissolved in a liquid.
C
The composition of the mixture is the same throughout.
D
The characteristics of the mixture change within a sample.
13

Which is a property of every mixture?

A
One substance dissolves in another substance.
B
The molecules of one substance break down in the other.
C
Different samples of a single mixture have different characteristics.
D
One substance can be separated from another through physical means.
14

Dominic made the table below to organize his notes about mixtures.What mistake did Dominic make?

Question illustration
A
The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed.
B
There is a definite recipe to make each mixture, so the composition of a mixture is set.
C
Although it is possible to have more than one state, it is also possible to have only one state.
D
A single substance can be used to make a mixture if the substance is composed of more than one element.
15

Which is a characteristic of colloids?

A
are homogeneous mixtures
B
have large dispersed particles
C
will settle out over time
D
are made up of at least two substances
16

Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions.Which is the best analysis of Eli’s statement?

A
It is correct because each ion is a pure substance, so sodium phosphate is made up of two pure substances.
B
It is correct because the composition of sodium phosphate changes depending on the sample.
C
It is incorrect because sodium phosphate is a compound that has a single composition.
D
It is incorrect because the two types of ions in sodium phosphate cannot be seen.
17

Hana fills a cup with sandy ocean water. She pours the mixture through a filter. What does she collect that passes through the filter?

A
a sample of pure water
B
a solution of salt in water
C
a suspension of sand in water
D
a colloid of salt in water
18

Julie takes a cold glass of clear, colorless liquid out of the refrigerator and puts it on the table. As the liquid warms up to room temperature, Julie sees bubbles of gas form in the liquid and rise to the surface.Which conclusion is best supported by Julie’s observations?

A
The liquid is a pure substance because it is colorless.
B
The liquid is a mixture because its temperature rises.
C
The liquid is a pure substance because it remains liquid when cold.
D
The liquid is a mixture because it has a gas dissolved in a liquid.
19

elementpure substancemixturesolution

A
element
B
pure substance
C
mixture
D
solution
20

What is the correct classification of a mixture in which both a solid and a liquid are visible?

A
a homogeneous mixture and a solution
B
a homogeneous mixture and a suspension
C
a heterogeneous mixture and a solution
D
a heterogeneous mixture and a suspension

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