Solution Unit
TEST
Friday
st
March the 21
WOD and Video
Quizzes
Introduction Video
• Take Notes
• Quiz to Follow
Activator – answer in your notebooks.
• The solution to your
lunchtime hunger
may be a mixture.
There are different
kinds of mixtures –
some are the same
throughout, while
• Which items in this picture
others are mixed
are the same throughout?
unevenly. This
Which are unevenly mixed?
picture shows a few
• Do you think the salad is the
of both kinds of
same kind of mixture as the
mixtures.
grape juice? Why or why
not?
SPS6: Students will investigate
the properties of solutions.
a. Describe solutions in terms
of solute and solvent.
EQ: How do different solutes with in
solvents affect the behavior of a
solution.
Label each flap with the following:
Solution Suspen- Solute
sion
Vs.
Colloid
Solvent
A solution is a homogenous mixture in a
single phase.
• salt water, air
steel, & tea
Types of solutions….
•
•
•
•
•
•
Gas in gas
Gas in liquid
Liquid in liquid
Liquid in solid
Solid in liquid
Solid in solid
oxygen in nitrogen
CO2 in water
alcohol in cola
mercury in silver
sugar in Kool aid
gold in nickel
Look alikes….
• Suspension: a mixture that
looks homogeneous but
settles over time.
• muddy water, blood &
oil and vinegar
Look Alikes….
• Colloids: mixtures
with very small
particles that
permanently float.
• Example: milk, shaving
cream, jello, clouds,
smoke
Parts of a Solution…
• Solute- substance that is dissolved
• Solvent- substance that does the
dissolving.
Identify the solute and solvent
Identify the solute and solvent
GAS BUBBLES
Universal Solvent = Water = aqueous
Types of solutes
• Electrolyte – solute
• Non-electrolyte – solute
that allows solution does not allow
to conduct
solution to conduct
electricity
electricity
• NaCl in aqueous
• Sugar in aqueous
solution
solution
Factors Affecting Dissolving
• Size of solute particles
• Temperature of solvent
• Agitation of solution
• Solubility of solute
Solubility – the amt of solute that can
dissolve in a solvent (100 mL of water)
Super-saturated
Solution : Above the line
To much solute,
No more of the solute
will be dissolved.
X
Saturated Solution:
On the line
Perfect ration of
solute to solvent.
X
X
Un-saturated
Solution:
Under the line
Not enough
solute, if more
solute is added it
can still be
dissolved.
Have out work sheet from
yesterday.
• Make sure the last 4 questions are
complete.
• Keep in mind:
– Super = above the line
– Saturated = on the line
– Under = under the line
Practice Problem
1. Which compound
is
the most soluble at
2. Which
solute’s
40
degrees?
solubility changes
the least as
temperature
3.increases?
How many grams
of
potassium bromide
will dissolve in 100 g
of water at 70
degrees?
Examine the solubility curve and decide if the following solutions
would be saturated, unsaturated or supersaturated?
1. 200 g of NaClO3
at 20 degrees
2. 40 g of salt at 60
degrees
3. 55 g of potassium
bromide at 100
degrees
4.At what
temperature would
a solution of 100 g
of KNO3 in 100 g
of water be
considered
unsaturated?
Now Complete the Graphing
Assignment.
• Make the graph – LINE GRAPH, with a
key (3 lines).
• Extra graph paper provided if you mess up
first graph – BUT, keep original for the
data and questions portion.
• Answer the question in complete
sentences – extra paper provided if
needed.
• Staple all sheets together and turn in.
Names for Compounds
• 1.
a) Salt = NaCl
b) You pick answer
c) You pick answer
d) NH4Cl = Ammonium Chloride
e) KNO3 = Potassium Nitrate
f) KI = Potassium Iodide
g) Match the compound with the symbol.
Acids, Bases, and Salts
Get out your GRAY
STUDENT
LEARNING MAP and
complete this!
The strength of an
Acid or Base
Depends on the
degree in which a
1.
acid
4.
Base
produce
produce
2. Hydrogen
Hydroxide
atoms
ions
In solution which are
5.
In solution which are
3.
Positive
and combine to form
6.
Salt
Negative
SPS6:
• D. Compare and contrast the components
and properties of acids and bases.
• E. Determine whether common household
substances are acidic or basic.
• EQ: How are acids and bases different;
what are some common household
examples?
Activator
• Many foods contain acids. For example,
vinegar is a solution of acetic acid that has
been used for centuries to preserve food.
Some foods are more acidic, while others
are less. Many acids have a sour taste.
• LIST ANY 5 FOOD/DRINKS that you think
are acidic.
Acids – substances that
+
causes an increase in H
ions in an aqueous solution
Release
Characteristics of Acids
• liquids
• sour taste
• solutions conduct electricity
• react with metals
Examples of Acids
HCl H3BO3 H2SO4 Acetic acid Citric acid -
Hydrochloric acid
Boric Acid
Sulfuric Acid
vinegar
lemons, limes
Bases (alkaline) – substances that
cause a decrease in H+ ions in an
aqueous solution
Absorbing
Characteristics of Bases
• solids
• bitter taste
• solutions feel slippery
• do not conduct electricity
• do not react with metals
Examples of Bases
NaOH sodium hydroxide
Ca(OH)2 - calcium hydroxide
NH3OH ammonium hydroxide
Soaps (lye), shampoos, “Drain-O”
Physical Science
Name __________________________ Date _________ Period ___
Battery Acid
Sod
a
Black Coffee
Baking
Soda
Drain
Cleaner
Pure Water
Lemona
de
Tomato
Juice
Bleach
Soapy
Water
Brain Pop on pH scale
• http://www.brainpop.com/science/matteran
dchemistry/phscale/
pH Scale - measures [H+]
Phenolphthalein
– chemical
that
Indicators - chemicals
that change
turns
bright
pink in
butpH
no
color
in solns
of bases
different
change in acids
Which pH indicator is the
most specific?
• pH paper
Litmus Paper
• When you think
– Acid = Red
– Bases = Blue
– So, when using the litmus paper use the
opposite color.
– You want the paper to turn the color you
associate the solution with.
Unit 8: Solutions Test Format
• 25 multiple choice
• Test Review Sheet will be posted on Ms.
Weis webpage on MCA site.
• Check your answers.
Lab TIME – copy this onto white paper!
1 2 3 4 5
A
B
C
Vinegar
NaOH
Coke
Lemon
Juice
Lysol
Milk
HCl
Distilled
Water
Neutralization Reactions
• Neutralization reaction - mixture of acid and
base in correct proportions .
• Forms a neutral solution of water and a salt
• Example: HCl + NaOH -- NaCl + H2O
• Titration: add acid/base drop by drop until
end point is reached
http://tinyurl.com/72topdc
6.7 pH Milk
2.5 pH Sports Drinks
6 pH Beauty Products
Make a poster.
Pick (5) pictures that
represent the topics of
this unit.
Label the pictures with a
WORD or PHRASE as to
why you picked it.