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LSU / Engineering / CHE 1201 / The substance making up the majority of a solution and in the “greates

The substance making up the majority of a solution and in the “greates

The substance making up the majority of a solution and in the “greates

Description

School: Louisiana State University
Department: Engineering
Course: Chemistry 1
Professor: Sean taylor
Term: Fall 2014
Tags:
Cost: 50
Name: Chem 1201 Exam 2 review and practice problems
Description: This covers everything you need to know for exam 2
Uploaded: 04/18/2017
5 Pages 43 Views 1 Unlocks
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1


The substance making up the majority of a solution; the substance in the “greatest abundance” is called what?



Exam 2 Review 

Review Equations/Concepts:

Net Ionic Equations:

I. balance molecular equation: 

II. Dissociate into ions 

Weak electrolytes stay together

Strong electrolytes split up

III. Cancel out spectator ions 

Strong Acids/Bases: 

Acid: H2SO4, HNO3, HI, HBr, HClO3, HClO4, HCL

Base: 1st row of the periodic table 

Dilutions: 

M1V1=M2V2 

Molarity Formula: 

¿of moles


The substance making up the minority of a solution is called what?



volume(L)= M Kinetic Energy: 

E=12m v2 

Wavelength Vs. Frequency: 

C=λV Energy of Light: 

E=hV

Light emitted from electrons related to principal quantum numbers: 

2

λ=Rh (1 We also discuss several other topics like An immature organism that looks different from adult animals is called what?

1

nfinal2−1

ninitial2 )

Energy change related to principal quantum numbers: 


The substance that dissolves into water is said to be what?



If you want to learn more check out North pole is tilted where?

Δ E=−hc RH (1 

nfinal2−1

ninitial 2 )

Chapter 4: Vocabulary Refreshment  

1. Match the appropriate sentence with its correct term. 

a. The substance making up the majority of a solution; the substance in the “greatest  abundance”; the solvent  

b. The substance making up the minority of a solution; the solute 

c. A solution is a homogenous mixture of two or more pure substances.  [Solvent, Solute, Solution, Homogenous, Heterogeneous] 

2. Match the appropriate sentence with its correct term.

a. The substance that dissolves into water is said to be soluble 

b. A substance in a solution that will conduct electricity is said to be a(n) electrolyte c. A substance that doesn’t dissolve into water is said to be insoluble 

d. A substance that will dissolve in a solution, but does not form ions is a(n)  nonelectrolyte 

[Electrolyte, Nonelectrolyte, Molecular Compounds, Covalent Compounds, soluble, insoluble]We also discuss several other topics like What is the meaning of lens in the eye?

3

3. In a weak electrolyte, there is a high concentration (anywhere from 1%­100%) of the solute  disassociated into its ionic components.    

A. True                          B. False C. Not clear enough!      D. Sometimes 4.   A solution containing a greater number of ions in solution will have a _______ conductivity.  A. Higher B. Equal  C. Lower

1. Predict what happens when a potassium phosphate solution is mixed with a calcium nitrate  solution. Form a balanced equation. Is there a reaction that takes place? If so, write the net 

ionic equation for the reaction. 

P O4¿2(s)+6 KN O3(aq) 

I)

NO3¿2(aq ) yields →

Ca3¿

2K3PO4(aq)+3Ca¿ Don't forget about the age old question of What is the meaning of human vestigial organ?

PO4¿2(s)+6 K( aq)+6 N O3(aq) 

II)

NO3¿(aq ) yields →

Ca3¿

III)

6 K(aq)+2 PO4(aq )+3Ca(aq)+6¿ PO4¿2(s) If you want to learn more check out Where is the world’s population distributed?

2 PO4 (aq)+3Ca(aq)yields →

Ca3¿

2. Two solutions of AgNO3 and NaCl are mixed. Which diagrams best represents this?               

Na+ (aq)

Cl— (aq)

Ag+ (aq)

NO3­ (aq) 

Cl— (aq)

Ag+ (aq)

NaNO3 (s) 

Don't forget about the age old question of Does the biological hormones of a person have a great influence in committing a crime?

Na+ (aq) 

NO3­ (aq)  

AgCl (s)

3.) In

NaNO3 (s)

AgCl (s)

order to form a final solution (325 ml 5 molar H2SO4), I must use a stock solution containing 9.7  moles of H2SO4 dissolved in 400 mL. How much of this stock solution will I need to form my  desired solution? (Give answers in L). 

4

(24.25)(V) = (5)(.375)

V=.067L

Chapter 5: Thermodynamics

1.) Energy CAN’T/CAN be created or destroyed. Energy can only be transformed 2.) If a system absorbs energy, it’s change in enthalpy is positive/negative. 

3.) If a system gives off energy, we’d call the reaction exergonic  

Chapter 6:  

1.) Wavelength is the distance between two adjacent wave peaks. 

2.) Frequency is the amount of cycles completed by a wave per second, or, hertz.  3.) Two different forms of electromagnetic radiation ARE OR ARE NOT the same speed. 4.) As wavelength increases, energy decreases 

5.) The bohr model describes only an hydrogen atom, with degenerative shells. 

6.) What is the wavelength of light with a frequency of 1018 hertz? What is it’s electromagnetic 

spectrum? 

C=λV

2.998∗108 

1018 =V

12.) What is the electron configuration of Carbon? 

5

1s22s22 p2 

1.) The following Example exhibits:  (S orbital, then P orbital) 

a.) Hund’s Rule  

b.) Pauli’s exclusion principle 

c.) Heisenberg’s Uncertainty Principle 

d.) Einstein’s Soup Postulate 

2.) The following Example exhibits: 

a.) Hund’s Rule 

b.) Pauli’s Exclusion Principle  

c.) Heisenberg’s Uncertainty Principle 

d.) Einstein’s Soup Postulate 

3.) Example: We bring an electrons velocity down to ALMOST 0, but whenever we do this, the  electron no longer stays in one spot, but assumes a superposition of possible locations.  

This is an example of ____________________. 

a.) Hund’s Rule 

b.) Pauli’s Exclusion Principle 

c.) Heisenberg’s Uncertainty Principle 

d.) Einstein’s Soup Postulate 

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