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Unit 4 Review. Sections B,C,D. Unit 4 B,C,D. What is the name of eachof the ions below? OH - H 3 O +. Unit 4 B,C,D. What is the name of eachof the ions below? OH - hydroxide - PowerPoint PPT Presentation
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Unit 4 B,C,DUnit 4 B,C,D
What is the name of eachof the ions below?
OH-
H3O+
Unit 4 B,C,DUnit 4 B,C,D
What is the name of eachof the ions below?
OH- hydroxide
H3O+ hydronium
Unit 4 B,C,DUnit 4 B,C,D
Which of these is in abundance in solution constitutes an acid?
OH- hydroxide
H3O+ hydronium
Unit 4 B,C,DUnit 4 B,C,D
Which of these in abundance in solution constitutes an acid?
H3O+ hydronium
Unit 4 B,C,DUnit 4 B,C,D
If there are an abundance of OH- ,
hydroxide ions, the solution will be ___________.
Unit 4 B,C,DUnit 4 B,C,D
If there are an abundance of OH- ,
hydroxide ions, the solution will be basic.
Unit 4 B,C,DUnit 4 B,C,D
Which of the following are acids, bases or salts?
H3PO4
MgOH
CH3COOH
MgSO4
NH4OH
Unit 4 B,C,DUnit 4 B,C,D
Which of the following are acids, bases or salts?
H3PO4 - acid
MgOH - base
CH3COOH - acid
MgSO4 -salt
NH4OH - base
Unit 4 B,C,DUnit 4 B,C,D
Complete the following reaction :
Acid + Base ______ + ________
Unit 4 B,C,DUnit 4 B,C,D
Complete the following reaction :
Acid + Base Salt + Water
Unit 4 B,C,DUnit 4 B,C,D
What type of reaction is this?
Acid + Base Salt + Water
Unit 4 B,C,DUnit 4 B,C,D
What type of reaction is this?
Acid + Base Salt + Water
Neutralization Reaction
Unit 4 B,C,DUnit 4 B,C,D
If equal amounts of H+ and OH- ions are added to the solution in the following reaction, what will be the resulting pH?
Acid + Base Salt + Water
Unit 4 B,C,DUnit 4 B,C,D
If equal amounts of H+ and OH- ions are added to the solution in the fo9llowing reaction, what will be the resulting pH?
Acid + Base Salt + Water
pH = 7 Neutral!
Unit 4 B,C,DUnit 4 B,C,D
If an acid is added to a pH 4.5 solution and the pH DOES NOT change, what assumptions can you make about the solution?
Unit 4 B,C,DUnit 4 B,C,D
If an acid is added to a pH 4.5 solution and the pH DOES NOT change, what assumptions can you make about the solution?
a)The solution contains a buffer.
b)The added acid is a very weak acid and does not contribute to the H+ concentration enough to measure.
Unit 4 B,C,DUnit 4 B,C,D
Given the following information, is HF (hydrofluoric acid) a strong or weak acid?
HF + H2O HF + H3O+
Unit 4 B,C,DUnit 4 B,C,D
Given the following information, is HF (hydrofluoric acid) a strong or weak acid?
HF + H2O HF + H3O+
If you still have HF in the products then it did not completely ionize and
is therefore a weak acid.
Unit 4 B,C,DUnit 4 B,C,D
A solution has the following concentrations of H3O+ and OH- ions in solution. Is the solution acidic or basic?
H3O+ = 1 x 10 -10
OH- = 1 x 10 - 4
Unit 4 B,C,DUnit 4 B,C,D
A solution has the following concentrations of H3O+ and OH- ions in solution. Is the solution acidic or basic?
H3O+ = 1 x 10 -10
OH- = 1 x 10 – 4
Basic! That OH- concentration is much higher than the H3O+ concentration.
Unit 4 B,C,DUnit 4 B,C,D
What is the pH of the solution?
H3O+ = 1 x 10 -10
OH- = 1 x 10 – 4
Unit 4 B,C,DUnit 4 B,C,D
What is the pH of the solution?
H3O+ = 1 x 10 -10
OH- = 1 x 10 – 4
pH is determined from the H3O+ concentration of ions in a solution. Therefore the pH is 10.
Unit 4 B,C,DUnit 4 B,C,D
An environmental survey team measured the pH of the rain near a municipal incinerator found it had a pH of 6.0.
How should the team react to this discovery?
Why?
Unit 4 B,C,DUnit 4 B,C,D
An environmental survey team measured the pH of the rain near a municipal incinerator found it had a pH of 6.0.
There is no cause for alarm because this is well within the natural pH rain
of rainwater.
Unit 4 B,C,DUnit 4 B,C,D
What is the pH of acid rain?
Unit 4 B,C,DUnit 4 B,C,D
What is the pH of acid rain?
Less than 5.6.
Unit 4 B,C,DUnit 4 B,C,D
If the pH of water is 7, why is rain with a pH range of 5.6 – 7.0 considered natural? Where did the acid come from?
Unit 4 B,C,DUnit 4 B,C,D
If the pH of water is 7, why is rain with a pH range of 5.6 – 7.0 considered natural? Where did the acid come from?
CO2 in the air dissolves in water to form carbonic acid, H2CO3.
Unit 4 B,C,DUnit 4 B,C,D
Which manmade atmospheric pollutants are responsible for acid rain?
Where do they come from?
Unit 4 B,C,DUnit 4 B,C,D
Which manmade atmospheric pollutants are responsible for acid rain?
SO2 H2SO4 from burning coal
NO2 HNO3 burning gasoline
Unit 4 B,C,DUnit 4 B,C,D
How many moles of H2SO4 does a 4 molar (4M) solution of sulfuric acid contain?
Unit 4 B,C,DUnit 4 B,C,D
How many moles of H2SO4 does a 4 molar (4M) solution of sulfuric acid contain?
It contains 4 moles for every liter of solution.
Unit 4 B,C,DUnit 4 B,C,D
How many moles are there in 102 g KOH?
How many moles are there in 102 g KOH?
K = 39 g/mol
O = 16 g/mol
H = 1 g/mol
KOH = 56 g/mol
Unit 4 B,C,DUnit 4 B,C,D
How many grams of KOH must be added to 1 liter of water to make a 2 molar solution?
Unit 4 B,C,DUnit 4 B,C,D
How many grams of KOH must be added to 1 liter of water to make a 2 molar solution?
K = 39 g/mol
O = 16 g/mol
H = 1 g/mol
KOH = 56 g/mol
Unit 4 B,C,DUnit 4 B,C,D
56 g KOH x 2 mol KOH 1 mol KOH 1 liter soln. = 102 g KOH
Classify each as a strong/weak concentrated/dilute acid/base
Unit 4 B,C,DUnit 4 B,C,D
Classify each as a strong/weak concentrated/dilute acid/base
Unit 4 B,C,DUnit 4 B,C,D
What does the following figure represent?
Unit 4 B,C,DUnit 4 B,C,D
What does the following figure represent?
Electromagnetic wave
Unit 4 B,C,DUnit 4 B,C,D
What is EM radiation?Unit 4 B,C,DUnit 4 B,C,D
What is EM radiation?
Electromagnetic waves that range in frequency from radio waves to gamma waves and includes
visible light.
Unit 4 B,C,DUnit 4 B,C,D
What is the name for one wavelength of electromagnetic energy?
Unit 4 B,C,DUnit 4 B,C,D
What is the name for one wavelength of electromagnetic energy? Photon
Unit 4 B,C,DUnit 4 B,C,D
What does the frequency of a wave measure?
Unit 4 B,C,DUnit 4 B,C,D
What does the frequency of a wave measure?
The number of waves that pass a given point per second.
Unit 4 B,C,DUnit 4 B,C,D
What is the relationship between frequency and energy of the wave?
Unit 4 B,C,DUnit 4 B,C,D
What is the relationship between frequency and energy of the wave?
The higher the frequency the more energy the wave has.
Unit 4 B,C,DUnit 4 B,C,D
What is the relationship between frequency and wavelength?
As frequency increases, wavelength decreases.
Unit 4 B,C,DUnit 4 B,C,D
What is the speed of all electromagnetic waves in a vacuum?
Unit 4 B,C,DUnit 4 B,C,D
What is the speed of all electromagnetic waves in a vacuum?
3 x 108 m/s
Unit 4 B,C,DUnit 4 B,C,D
What is the equation that shows the relationship between frequency, wavelength and speed of light?
Unit 4 B,C,DUnit 4 B,C,D
What is the equation that shows the relationship between frequency, wavelength and speed of light?
V = f x Wave velocity = frequency x wavelength
Unit 4 B,C,DUnit 4 B,C,D
What is frequency of light that has a wavelength of 580 nm?
V = f x
Unit 4 B,C,DUnit 4 B,C,D
List the following in order of increasing energy:
Visible light
Infrared radiation
X-rays
Gamma rays
Radio waves
Microwaves
UV radiation
Unit 4 B,C,DUnit 4 B,C,D
List the following in order of increasing energy:
Radio waves (lowest)
microwaves
Infrared radiation
Visible light
UV radiation
X-rays
Gamma rays (highest)
Unit 4 B,C,DUnit 4 B,C,D
Which of the following makes up the type of energy we call radiant heat?
Radio waves (lowest)
microwaves
Infrared radiation
Visible light
UV radiation
X-rays
Gamma rays (highest)
Unit 4 B,C,DUnit 4 B,C,D
Which of the following makes up the type of energy we call radiant heat?
Infrared Radiation
Unit 4 B,C,DUnit 4 B,C,D
Which of the following make up the majority of the solar spectrum?
Radio waves (lowest)
microwaves
Infrared radiation
Visible light
UV radiation
X-rays
Gamma rays (highest)
Unit 4 B,C,DUnit 4 B,C,D
Which of the following make up the majority of the solar spectrum?
Infrared radiation
Visible light
UV radiation
Unit 4 B,C,DUnit 4 B,C,D
Put the following in order as they appear in the visible spectrum (the rainbow).
Blue
Green
Indigo
Orange
Red
Violet
yellow
Unit 4 B,C,DUnit 4 B,C,D
Put the following in order as they appear in the visible spectrum (the rainbow). Remember ROY G BIV
Red
Orange
yellow
Green
Blue
Indigo
Violet
Unit 4 B,C,DUnit 4 B,C,D
Which gases in the troposphere absorb IR radiation (heat)?
Unit 4 B,C,DUnit 4 B,C,D
Which gases in the troposphere absorb IR radiation (heat)?
CO2 CH3 H2O
Unit 4 B,C,DUnit 4 B,C,D
What is the term used to refer to these gases the absorb heat?
CO2 CH3 H2O
Unit 4 B,C,DUnit 4 B,C,D
What is the term used to refer to these gases the absorb heat?
CO2 CH3 H2O
Greenhouse gases
Unit 4 B,C,DUnit 4 B,C,D
Is global warming real?Unit 4 B,C,DUnit 4 B,C,D
Is global warming real?
Yes, the data suggests that the earth is experiencing a warming trend. The controversy is over the extent to which humans
have altered the natural warming and cooling cycles.
Unit 4 B,C,DUnit 4 B,C,D
What is the suggested cause of human driven global warming?
Unit 4 B,C,DUnit 4 B,C,D
What is the suggested cause of human driven global warming?
The use of fossil fuels that release CO2 and Methane into
the environment.
Unit 4 B,C,DUnit 4 B,C,D
What is specific heat capacity?Unit 4 B,C,DUnit 4 B,C,D
What is specific heat capacity?
The quantity of thermal energy needed to raise the temperature of one gram of a material by one
degree. (Celsius or Kelvin it doesn’t matter because they are
the same size )
Unit 4 B,C,DUnit 4 B,C,D
Describe the heat transfer that occurs when you add an ice cube to a cup of hot chocolate.
Unit 4 B,C,DUnit 4 B,C,D
Describe the heat transfer that occurs when you add an ice cube to a cup of hot chocolate.
The hot chocolate will transfer energy in the form of heat to the
ice cube. Eventually enough energy will be transferred that
the ice will melt.
Unit 4 B,C,DUnit 4 B,C,D
If the ice cube has a mass of 10 g and temperature is 0°C, how much energy must it absorb from the hot chocolate before it completely melts and mixes with the 40°C drink? Remember the specific heat capacity for water is
4.18 J/(g°C)
Unit 4 B,C,DUnit 4 B,C,D
If the ice cube has a mass of 10 g and temperature is 0°C, how much energy must it absorb from the hot chocolate before it completely melts and mixes with the 40°C drink? Remember the specific heat capacity for water is
4.18 J/(g°C)
Q = cmT
Q = (4.18 J/g°C)(1 g)(40°-0°)
= 167.2 J
Unit 4 B,C,DUnit 4 B,C,D
