From the reaction shown below, what is expected to be seen in the flask as the reaction progresses towards the product side of the reaction?

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Lab 5 Chemical Reactions

E X Fall 2022 Introduction

Post-Lab Question

From the reaction shown below, what is expected to be seen in the flask as the reaction progresses towards the product side of the reaction? (select one)

AgNO3 (aq) + NaCI (aq) AgCI (s) + NaNO3 (aq)

clear-colorless clear-colorless white solid

clear-colorless

O a. a solution containing a white solid O b. a clear-brown solution O c. a clear-colorless solution • d. a solution with greenish-yellow bubbles

 

What is the pH if 2.0 g og Ca(OH)2 are added to 1.0 liter of stomach solution with a pH=1.0?

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Acids and bases

What is the pH if 2.0 g og Ca(OH)2 are added to 1.0 liter of stomach solution with a pH=1.0?

 

How many of the electrons in this atom have a principal quantum number of 4? How many electrons are in the valence shell of this atom? When this atom is excited, between what atomic orbitals will an electron move for the smallest possibleincrease in energy?

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Marey academy for math and science

SCH4U Atomic theory assignment

Problem 1 [ /10]

For the five sets of four quantum numbers below, explain what is wrong with each set for an electron in a one-electron atom.

Make sure to refer back to the limits of each quantum number.

(a)

n = 1,

l = 1,

m l = +1,

m s = +

2

1

(b)

n = 2,

l = 0,

m l = +1,

m s = –

2

1

(c)

n = 3,

l = -1,

m l = 0,

m s = +

2

1

(d)

n = 4,

l = 2,

m l = +3,

m s = 0

(e)

n = 5,

l = +3,

m l = –2,

m s = – 1

Problem 2 [ /5]

Fill in the missing values or names of the following sets of quantum numbers.

(a)

n = 2,

l = ?,

m l = +1; name: 2

p

(b)

n = ?,

l = 0,

m l = ?; name: 4

s

(c)

n = 3,

l = 1,

m l = +1; name: ?

(d)

n = 3,

l = ?,

m l = 0; name: 3

d

Problem 3 [ /5]

Identify the element that matches each of the following descriptions.

(a) The ground state electron configuration of the ion of this element carrying a 4+ charge is [Ar] 4s 2 3d 3 .

(b) The electron configuration of this element in its first excited state is [Ar] 4

s 1 4

p 1 .3

d 10

(c) The ground state electron configuration of this element is [Xe] 6

s 2 .4

f 1 5

d 1

(d) The ion of this element carrying a charge of 3– has the ground state electron configuration [Xe].

(e) The ground state electron configuration of the ion of this element that has a charge of 5+ is [Kr] 5s 2 4 d 6 .

Problem 4 [ /15]

Use the aufbau principle to write the ground state electron configuration of the following ions.

(a) Ir 4+ (b) Co 3+

(c) In 3+ (d) Bi 3–

(e) Hg +

Problem 5 [ /14]

(a) Explain Pauli Exclusion Principle and Hund’s Rule. (4)

(b) Use orbital diagrams to represent the ground state electron configuration of the ions in problem 4. (10)

Problem 6 [ /6]

The element tungsten has the symbol W, after the name of the ore, wolframite, from which it can be recovered.

(a) Use the aufbau principle to write the ground state electron configuration of an atom of this element. (3)

(b) How many of the electrons in this atom have a principal quantum number of 4? (1)

(c) How many electrons are in the valence shell of this atom? (1)

(d) When this atom is excited, between what atomic orbitals will an electron move for the smallest possibleincrease in energy? (1)

A chemist mixes 80. g of diethyl ether with 17. g of thiophene and 38. g of acetic acid. Calculate the percent by mass of each component of this solution. Round each of your answers to 2 significant digits.

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STATES OF MATTER Calculating mass percent composition

V

A chemist mixes 80. g of diethyl ether with 17. g of thiophene and 38. g of acetic acid. Calculate the percent by mass of each component of this solution. Round each of your answers to 2 significant digits.

Component mass percent diethyl ether thiophene acetic acid

x

1g1

IS Ar

w

 

 

Calculate the concentration in mmol/L of the chemist’s silver(I) perchlorate solution. Round your answer to 2 significant digits.

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CHEMICAL REACTIONS Calculating molarity using solute moles

0/S (Madeline V)

V

A chemist prepares a solution of silver(I) perchlorate (AgC104) by measuring out 5.0 x 102 gmol of silver(I) perchlorate into a 300. mL volumetric flask and filling the flask to the mark with water.

Calculate the concentration in mmol/L of the chemist’s silver(I) perchlorate solution. Round your answer to 2 significant digits. n mmol u L

Explanation

x 6

Ogo

19

O

Identify a topic of interest to you. Read a paper from the references provided. Describe the article in ~1 page. Include why it is important and a general description of the topic.

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Electrochemistry

As a scientist, it is important to be able to independently study topics that are of interest to you.

Electrochemistry has many applications and societal impacts. For this quiz, identify a topic of interest to you. Read a paper from the references provided. Your primary paper must be one of the references suggested or obtain permission from the instructor. You are encouraged to use other sources to understand your primary source but must cite your sources. I suggest to start with chemistry textbooks and papers, but it is fine to use other sources to understand key concepts (i.e. Wikipedia, Kahn academy videos). You are permitted to discuss papers with your classmates, but must write your own answers. Ask the professor, TAs, or peer leaders if you need help! Do not quote directly from the article or any other source.

  1. Cite the primary reference here, including the article title. Use a proper citation method,
  2. Describe the article in ~1 page. Include why it is important and a general description of the topic.

Include a thorough explanation of the electrochemistry involved. For some topics, there may be multiple electrochemical systems described. You should select one area to focus on. If you are describing an experiment, you should clearly describe experimental setup, how experiments are run, the type of data collected, and how data is analyzed. If you are describing a technology, you should fully explain how the technology works, what purpose it serves, and the strengths and weaknesses of the approach. Your description should support the images described in points 3 & 4.

  1. Draw a model of at least one electrochemical system or setup.  draw it yourself, rather than pasting a picture. It is OK if it is very similar to the original picture, but be sure to cite your source.

Often it is better to prepare a simpler version of a figure in a paper. You may use photographs of a device or similar images from a paper in addition to your drawn schematic.

  1. Be sure to include the chemistry that is involved in your system. Include chemical reactions, the identity of reagents, etc. You can simplify this information to include only the most critical compounds. You can also simplify structures as desired .
  2. Describe why you chose the article.
  3. Cite any additional references, again using proper formats.
  4. If you want to work with a partner, plan to write 2 pages. Be sure to submit a single entry in gradescope as a group assignment.

A list of topics can be found here:

https://docs.google.com/document/d/1Tl3rSwO9CCkNJ7hatZdwxTA9TIv1U_ePgJKJQmh7cAU/edit?us

p=sharing

Participate in an online simulation and complete a worksheet based on your activity in the simulation by answering questions and including screenshots of your work.

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States of Matter

For this assignment, you will participate in an online simulation and complete a worksheet based on your activity in the simulation by answering questions and including screenshots of your work. You must be logged into Blackboard to access the simulation.

States of Matter Interactive Simulation

 

What type of instrument, chemical test or sensor can be done, or sensor used to monitor quality of raw materials and products?

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Assignment – Summary of Physical and Chemical Properties

  1. Drawing of reaction (from M to N)
  2. List of chemicals and physical properties
List of Chemicals used or created Phase (solid, liquid, gas) Melting Point or Boiling Point (indicate BP or MP) Solubility Data Autoignition temp (or flashpoint) Density
Chemical 1          
Chemical 2          
Chemical 3          
Chemical 4          
Add more if needed…          

 

  1. SDS Hazards Identification
List of Chemicals Classification of the substance (section 2.1 of the SDS sheet)
Chemical 1  
Chemical 2  
Chemical 3  
Chemical 4  
Add more if needed…  

 

  1. SDS Hazards Identification – Handling and Storage

 

List of Chemicals Handling and Storage (section 7.1, 7.2 and 7.3 of the SDS sheet)
Chemical 1  
Chemical 2  
Chemical 3  
Chemical 4  
Add more if needed…  

 

  1. Quality Control
List of Chemicals Chemical Analysis (what type of instrument, chemical test or sensor can be done, or sensor used to monitor quality of raw materials and products)
Chemical 1  
Chemical 2  
Chemical 3  
Chemical 4  
Add more if needed…  

 

 

Using robust details and ample evidence, create a reflection paragraph that describes 4 learning objectives you met while performing this experiment.

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Reflection Analysis

Using robust details and ample evidence, create a reflection paragraph that describes 4 learning objectives you met while performing this experiment. View the learning objectives from the lab manual provided and select four to focus your writing on. Make this a well-constructed paragraph by including an introduction and conclusion sentences, avoiding bulleted lists. Challenge yourself to meet a 250-word count goal. 6 paragraphs, 4 for each objective and 2 for the conclusion and intro.

 

Write down the chemical reaction for the experiment and the mechanism for the reaction as well. With the amounts listed in the video, find moles for reactants, find limiting reagent, and find theoretical number of grams of product.

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Nitration of Methylbenzoate lab report

Instructions lab report:

o You must have an introduction stating the purpose of the experiment.

o Summarize in your own words the experimental procedures carried out in the video called EAS Nitration Experiment and Recrystallization. Summarize the experimental procedures from the video as instructions that you would find in a lab manual. For example:

o 1)

o 2)

o 3) etc.

o THIS IS THE VIDEO TO SUMMARIZE:

o Write down the chemical reaction for the experiment and the mechanism for the reaction as well.

o With the amounts listed in the video, find moles for reactants, find limiting reagent, and find theoretical number of grams of product.

o Find percent yield with the experimental number of grams mentioned in the video.

o Sources of errors to discuss low percent yield, inaccurate melting point compared to literature value, recrystallization process.