solution unit test friday march the 21 st. wod and video quizzes
TRANSCRIPT
Solution Unit
TEST
Friday
March the 21st
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 others are mixed unevenly. This picture shows a few of both kinds of mixtures.
• Which items in this picture are the same throughout? Which are unevenly mixed?
• Do you think the salad is the same kind of mixture as the 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.
Solution Suspen-sion
Vs.
Colloid
Solute SolventLabel each flap with the following:
A solution is a homogenous mixture in a single phase.
• salt water, air
steel, & tea
Types of solutions….• Gas in gas oxygen in nitrogen• Gas in liquid CO2 in water• Liquid in liquid alcohol in cola• Liquid in solid mercury in silver• Solid in liquid sugar in Kool aid• Solid in solid 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 that allows solution to conduct electricity
• NaCl in aqueous solution
• Non-electrolyte – solute does not allow solution to conduct electricity
• Sugar in aqueous 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)
X
Saturated Solution:On the linePerfect ration of solute to solvent.
X
X
Super-saturated Solution : Above the lineTo much solute,No more of the solute will be dissolved.
Un-saturated Solution:Under the lineNot 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 Problem1. Which compound is the most soluble at 40 degrees?
2. Which solute’s solubility changes the least as temperature increases?
3. 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 SaltsThe strength of an
Acid or Base
Depends on the degree in which a
1. acid
2. Hydrogen ions
3.
Positive6. Salt
4. Base
5.
Negative
Hydroxide atoms
produce
In solution which are
produce
In solution which are
and combine to form
Get out your GRAY STUDENT LEARNING MAP and complete this!
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 solutionRelease
Characteristics of Acids• liquids• sour taste
• solutions conduct electricity• react with metals
Examples of AcidsHCl - Hydrochloric acid
H3BO3 - Boric Acid
H2SO4 - Sulfuric AcidAcetic acid - vinegarCitric acid - lemons, limes
Bases (alkaline) – substances that cause a decrease in H+ ions in an
aqueous solutionAbsorbing
Characteristics of Bases• solids
• bitter taste • solutions feel slippery• do not conduct electricity• do not react with metals
Examples of BasesNaOH - sodium hydroxide
Ca(OH)2 - calcium hydroxide
NH3OH - ammonium hydroxide
Soaps (lye), shampoos, “Drain-O”
Physical Science Name __________________________ Date _________ Period __________
Battery AcidSoda
Tomato Juice
Lemonade
Black Coffee Baking Soda
Bleach
Pure Water
Soapy Water
Drain Cleaner
Brain Pop on pH scale
• http://www.brainpop.com/science/matterandchemistry/phscale/
pH Scale - measures [H+]
Indicators - chemicals that change color in solns of different pH
Phenolphthalein – chemical that turns bright pink in bases but no 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!
Vine-gar
Coke
NaOH
ABC
Lemon Juice
Milk
Lysol
HCl
Distilled Water
1 2 3 4 5
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
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.
6.7 pH Milk2.5 pH Sports Drinks6 pH Beauty Products