

L2 Matter, Energy and Change
Presentation
•
Chemistry, Science
•
10th - 12th Grade
•
Medium
Pema Wangdak
Used 38+ times
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5 Slides • 5 Questions
1
L2 Matter, Energy and Change

2
Mixtures
is a type of matter that
1 ....... is composed of 2 or more substances that are physically combined
2...... has composition that can change (vary) from one sample to another
3....... can be physically separated into its components
4....... retains the properties of the individual components
3
Examples of mixture
NaCl (aq) ........ salt water
C6H12O6 (aq) ....... sugar solution
HCl (aq) ......... Hydrochloric acid solution
soil, concrete and air are also mixture
4
Homogeneous mixture
the components of the mixture are uniformly and evenly mixed throughout
sample taken with the same mixture have the same composition
5
Heterogeneous mixtures
the components of the mixture are not uniformy mixed throughout
sample taken with the sample mixture have different composition
6
Multiple Choice
Which is a mixture of substances?
Cl2(g)
H2O(l)
MgCl2(s)
KNO3(aq)
7
Multiple Choice
Which is true of a KCl solution?
It is composed of substances that are chemically combined.
It is composed of substances that are physically combined.
It is composed of substances with the same atomic number.
It is a pure substance.
8
Multiple Choice
Which are elements?
A
B
C & D
C
9
Multiple Choice
When NaNO3(s) is dissolved in water, the resulting solution is classified as a
heterogenous compound
homogeneous compound
heterogeneous mixture
homogeneous mixture
10
Multiple Choice
One similarity between all mixtures and compounds is that both
are heterogeneous
are homogeneous
combine in definite ratio
consist of two or more substances
L2 Matter, Energy and Change

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