Buy Solved CHEM 120 Unit 4 Labs OL Lab 7 and OL Lab 8
CHEM 120 Unit 4 Lab: OL Lab 7: Ideal Gas Law
Learning Objectives
- Explain the physical concepts of temperature and absolute zero
- Define the relationship between pressure, volume, and temperature in gases using gas thermometry
- Apply the Ideal Gas Law
Introduction
Just because Celsius, Fahrenheit, and Kelvin defined their own temperature scales and named them after themselves, it doesn’t mean that you can’t create your own! In the Ideal Gas Law simulation, you will define the physical concept of temperature and absolute zero. You will observe how ideal gas molecules behave according to the Ideal Gas Law, and you’ll learn about the relationship between pressure, volume, and temperature in gases using gas thermometry.
Define your temperature scale
Your first mission in the Ideal Gas Law simulation will be to define a unique temperature scale. In order to complete this task, you will assign the correct temperature to various reference points. You will discover at which temperature water freezes and nitrogen boils. At the end of this mission, you will be able to calculate a new value for Boltzmann’s constant.
Formulate the Ideal Gas Law
Imagine how easy it would be to understand the behavior of an ideal gas if the gas molecules were so big that they could be seen with the naked eye. Well, in this simulation they can! The gas molecules are magnified, so you can see what is otherwise invisible. Your next mission is to define the relationship between the pressure, temperature, and volume of an ideal gas sealed in a glass jar.
Experiment with gas thermometry
Handling extreme temperatures is not a hazard as long as you’re a part of this simulation! Observe the changes in the pressure of an ideal gas as you cool it down from the temperature of boiling water to the temperature of boiling nitrogen. You will have complete freedom to repeat the experiment with any amount of gas and to define the absolute zero temperature.
Are you ready to apply the Ideal Gas Law and everything you learned in gas thermometry in order to assist in the transport of an organ for transplant surgery?
Part 1: Complete Labster lab: Ideal Gas Law
Part 2: Report and Reflection
Purpose: Describe in complete sentences and in your own words, the purpose of this experiment.
Observations: Record three observations from the simulation.
Answer the questions below:
- If the pressure of a fixed volume of gas decreased in a sealed container, what variable would you think changed? Did this variable increase or decrease?
- Why is it important to convert into units of Kelvin before using the Ideal gas law?
- Using what you learned in this simulation, explain why compressed gas cylinders, such as those found in the hospital, typically contain a warning to not leave in sunlight or expose to heat.
- Reflection: Consider what you learned from this simulation. Reflect on three to four key concepts that you learned in this lab exercise. How could the lessons learn in this virtual lab related to a real-world situation in the community/world or your future career? Be specific in your answer (this should require 5-10 sentences).
CHEM 120 Unit 4 Lab: OL Lab 8: Acids and Bases
Learning Objectives
- Give examples of acids and bases from everyday life
- Define pH and identify acids and bases using the pH scale
- Apply the Bronsted-Lowry definition of acids and bases to chemical compounds
- Describe the amphoteric and self-ionization capacity of water
- Calculate the pH of a strong acid and base in the solution
- Assess whether a neutralization reaction will occur
- Evaluate the outcome of simple acid-base reactions
Introduction
Have you ever consumed an acid or a base? Yes, you have! Acids and bases are found all around us: In the food we eat, the beverages we drink, many of the everyday household products at home and even inside us! In this virtual simulation, you will learn the fundamentals of acids and bases and go through some of the ways they can be characterized and used in the lab.
Acidic life
How do acidic or alkaline foods affect the pH of our blood, and what does this even mean? Together with your lab assistant, Marie, you will explore different concepts of acids and bases, and investigate how alkaline foods can also contain acids. You will measure the pH of solutions, and dive into these to experience what happens at the molecular level.
Salty mixtures
In order to determine what reactions occur when you mix acids and bases of different strengths, you will have the freedom to mix these solutions and interpret the resulting salt products. And don’t worry if you make mistakes – in this virtual lab, you can just reset and start over! On-the-go quizzes will make sure you are up to speed, and you can always dive into the theory pages for more in-depth explanations.
Corrosive everyday chemicals
Acids and bases can be corrosive and very dangerous to handle. But they also play a fundamental role in all living things, in nature, and in the chemical industry.
Will you be able to measure the acidity of various substances around you?
Part 1: Complete the Labster lab: Acids and Bases
Part 2: Report and Reflection
Purpose: Describe in complete sentences and in your own words, the purpose of this experiment.
Observations: Record three observations from the simulation.
Answer the questions below
- In your own words, describe how to determine which substance acts as an acid and which substance acts as a base in the forward direction of the following reaction: H2S + H2O ⇌ H3O+ + HS–
- Predict the two products of the following neutralization reaction and label each product using acid/base terminology: HCl + RbOH →
- In your own words, describe the relationship between proton (H+) concentration, and pH. (2 points)
- Reflection: Consider what you learned from this simulation. Reflect on three to four key concepts that you learned in this lab exercise. How could the lessons learned in this virtual lab be related to a real-world situation in the community/world or your future career? Be specific in your answer (this should require 5-10 sentences).
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