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Classifying Matter Worksheet Key, Slides of Chemistry

EHSAL - Europese Hogeschool BrusselChemistry

Chemistry 11. Classifying Matter. Assignment. 1. Complete the following sentences by filling in the appropriate word from the list below. Elements. Mixtures.

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2021/2022

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Name: Block: Date:
Chemistry 11 Classifying Matter Assignment
1. Complete the following sentences by filling in the appropriate word from the list below.
Elements
Mixtures
Compound
Symbols
Properties
Carbon
Pure
Letters
Carbon dioxide
a. _____Elements______ cannot be separated by physical or chemical means.
b. Elements are abbreviated with _____symbols_____, which consist of one or
two _____letters_______.
c. Two or more elements chemically combined make up a ____compound_____.
d. _____Carbon_____ is an example of an element and
____carbon dioxide_____ is an example of a compound.
e. Elements and compounds are called ______pure______ substances because
they have a unique set of chemical and physical ____properties____.
2. Fill in the blanks in the following chart.
Element Name
Element Symbol
Common Ions Formed
a. Sodium
Na
+1
b. Copper
Cu
+2, +1
c. Tungsten
W
+6
d. Iron
Fe
+3, +2
e. Tin
Sn
+4, +2
f. Potassium
K
+1
g. Gold
Au
+3, +1
h. Silver
Ag
+1
3. Classify each of the following as one of an Atom (A), a Molecule (M) or an Ion (I).
a. P3- __I__
b. H2O __M__
c. O2 __M__
d. Au3+ __I__
e. Ge __A__
f. O __A__
g. Ca2+ __I__
h. NH3 __M__
pf2

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Name: Block: Date:

Chemistry 11 Classifying Matter Assignment

  1. Complete the following sentences by filling in the appropriate word from the list below. Elements Mixtures Compound Symbols Properties Carbon Pure Letters Carbon dioxide a. _____Elements______ cannot be separated by physical or chemical means. b. Elements are abbreviated with _____symbols_____, which consist of one or two _____letters_______. c. Two or more elements chemically combined make up a ____compound_____. d. _____Carbon_____ is an example of an element and ____carbon dioxide_____ is an example of a compound. e. Elements and compounds are called ______pure______ substances because they have a unique set of chemical and physical ____properties____.
  2. Fill in the blanks in the following chart. Element Name Element Symbol Common Ions Formed

a. Sodium Na +

b. Copper Cu +2, +

c. Tungsten W +

d. Iron Fe +3, +

e. Tin Sn +4, +

f. Potassium K +

g. Gold Au +3, +

h. Silver Ag +

  1. Classify each of the following as one of an Atom (A), a Molecule (M) or an Ion (I). a. P^3 -^ I b. H 2 O M c. O 2 M d. Au 3+ I e. Ge A f. O A g. Ca 2 + I h. NH 3 M
  1. Describe the difference between a homogeneous and heterogeneous mixture. Give an example of each. Homogeneous: looks the same throughout (one phase) Ex. Salt water Heterogeneous: different parts if the mixture can be seen (more than one phase) Ex. Trail mix
  2. Assume you have 10g of pure gold. Should you refer to the gold as an atom or an element? Why? Element, an atom is only a single particle of the element. In 10g of a sample there will be LOTS of atoms.
  3. Which of an Element (E), Compound (C), Solution (S), or Mechanical Mixture (MM) are possible classifications for the following? (There may be more than one answer for each example). a. A clear liquid which can be boiled away to leave a white solid. S b. A collection of solid particles, some of which are white, and some of which are red. MM c. A solid which melts at 170oC. E or C d. A gas. E or C or S_ e. A liquid. __ E or C or S ___ f. A liquid which boils away completely at 136 o C. When the liquid is strongly heated in a closed container, a yellow gas and a black solid are produced. C_
  4. Which substance is the solute in each of the following? a. Water containing 5% acetic acid (this mixture is commonly called “vinegar”. ____ acetic acid ____ b. Tincture of iodine (a small amount of solid iodine mixed with alcohol). _____iodine________ c. A mixture containing 60% alcohol and 40% chloroform. _____chloroform____ d. A solution containing 900g of silver nitrate in 100g of water. ____silver nitrate___
  5. Classify the following as a Pure substance (P) or Mixture (M). a. Air __ M___ b. Sugar _P c. Dirt _M
  6. Classify each of the following as a Mixture (M) or a C ompound (C). a. Alcohol, CH 3 CH 2 OH C b. A pizza M c. Soda pop M d. Baking soda, NaHCO 3 C e. CH 3 OH in H 2 O M f. Iced Tea M
  7. In an aqueous solution of calcium chloride, what is the solvent and what is the solute? Solvent: _________water___________ Solute: _____Calcium chloride______