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Mrs. Cash - Chemistry Help and Tutorial Videos
United States
Приєднався 26 бер 2014
I am a certified chemistry teacher (AP chemistry, honors chemistry, grade level chemistry) and this is the place to come to for chemistry help! This UA-cam channel is a resource for my chem students to bring the concepts and lessons from the classroom to them at home. This channel is meant to teach lessons at home in the form of tutorial videos, provide a "how to" refresher for several concepts step by step, provide extra help or flipped classroom videos, or be used in place of a tutor. A lot of the videos on the channel have been specifically requested by my students.
Some topics include: atomic structure, electron configuration, orbital diagrams, periodicity, waves and wave equations, half life and writing decay equations, chemical reactions, stoichiometry, ionic compounds, formulas and naming, drawing lewis structures, kinetics, equilibrium, le chatelier's principle, thermodynamics, heat of reaction, acids and bases, molarity, conversions, and intermolecular forces (IMFs).
Some topics include: atomic structure, electron configuration, orbital diagrams, periodicity, waves and wave equations, half life and writing decay equations, chemical reactions, stoichiometry, ionic compounds, formulas and naming, drawing lewis structures, kinetics, equilibrium, le chatelier's principle, thermodynamics, heat of reaction, acids and bases, molarity, conversions, and intermolecular forces (IMFs).
Buffers Explained: How Buffers Work and How to Solve Buffer Problems | AP Chemistry
In this AP chemistry tutorial video, I will explain what a buffer is, how a buffer works, how to prepare a buffer, and how to solve buffer problems.
Переглядів: 129
Відео
How to solve for pH or Ka in Weak Acid Problems + SHORTCUT | AP Chemistry
Переглядів 1023 місяці тому
In this AP chemistry tutorial video, I explain how a weak acid problem differs from a strong acid problem. For a weak acid, the Ka is a measure of how much the weak acid ionizes. If given the Ka and initial acid concentration, you can solve for the pH by completing an equilibrium problem relating to the ionization of the acid or the dissociation of the acid. I show how you can solve this with b...
Ksp and Molar Solubility Explained | How to Calculate Ksp | How to Calculate Molar Solubility
Переглядів 1834 місяці тому
This is a video explaining Ksp and molar solubility. First, the chemical reaction associated with Ksp is introduced. We talked about concepts related to Ksp and molar solubility problems. We then get into calculations and show how to calculate Ksp given the molar solubility, and how to calculate the molar solubility given the Ksp.
Catalysts and Activation Energy | Maxwell-Boltzmann Distribution Curve in Kinetics | AP Chemistry
Переглядів 1665 місяців тому
In this video, I talk about activation energy, catalysts, how temperature and catalysts affect the Maxwell-Boltzmann Distribution Curve.
What are Partial Pressures | Calculating Partial Pressure | Dalton's Law Equation Tutorial
Переглядів 948 місяців тому
In this chemistry tutorial video, I walk you through what partial pressure is, how you can calculate it, and how you can use it to solve for the total pressure in a mixture using Dalton's Law Equation. We go through Daltons Law Equation and I show you how to use the ideal gas equation, PV=nRT, for partial pressures or total pressures. We take a look at how partial pressure relates to molarity o...
How to Draw A Particle Diagram for a Precipitation Reaction
Переглядів 35211 місяців тому
In this chemistry tutorial video, I walk you through how to write a particle diagram or particulate model for a precipitation or double replacement reaction. I walk you through where certain ions should be placed in the solution, or precipitated at the bottom of the solution. I talk about the products, and relative ratios that should be drawn, as well as what to do for limiting and excess react...
What is Q, the Reaction Quotient | Predict Reaction Shift or Direction | Equilibrium AP Chemistry
Переглядів 112Рік тому
In this chemistry tutorial video, you will learn about Q, the quotient, which is really just the number you get when plugging in INITIAL concentrations (or partial pressures) into the equilibrium constant expression rather than equilibrium concentrations (or partial pressures). We can check if we are at equilibrium at any point by plugging in the initial data to calculate Q. If Q = K, then we a...
Gibbs Free Energy and the Equilibrium Constant (∆G and K)
Переглядів 320Рік тому
In this chemistry tutorial video, you will learn how Gibbs free energy (∆G) relates to equilibrium and the equilibrium constant, K. I start out by reviewing standard state conditions and what Q, the quotient, is at standard state (Q=1). Then we go into how a thermodynamically favorable reaction means that the reaction is going forward to create product, so when , ∆G is less then 0 or negative, ...
PE Diagrams - How to Read and Interpret a Potential Energy Diagram (For AP Chemistry)
Переглядів 377Рік тому
In this chemistry tutorial video, you will learn how to read and interpret a PE diagram. A potential energy diagram, or PE diagram, shows the changes in energy throughout the course of a reaction. We can use these potential energy diagrams or PE graphs to find the heat of reaction, activation energy, effect of a catalyst, and more for our reaction.
Properties of Molecular, Ionic, and Metallic Substances | Lattice Energy | Ionic vs. Molecular
Переглядів 207Рік тому
In this chemistry tutorial video, we look at properties of molecular compounds, ionic compounds, and metals. For ionic compounds, we will look at what lattice energy is, and how different factors affect lattice energy. For metallic substances, we will also look at the two different types of allows: interstitial and substitutional alloys. 0:00 Properties of Molecular compounds 2:23 Ionic Compoun...
How to Read A Bond Energy Diagram for Bond Formation | Bond Length and Bond Strength
Переглядів 1,6 тис.Рік тому
This chemistry tutorial video first reviews several facts about bonds that are needed to be known in order to accurately read and interpret a bond energy diagram, such as factors that affect bond length and strength, and how a bond is a force of attraction that requires energy to break. Then, it walks you through how an energy diagram for bond formation is created, and how it changes based on b...
Sigma and Pi Bonds, and Factors that Affect Bond Length and Strength
Переглядів 520Рік тому
In this video, we will look at the difference between sigma and pi bonds, and how to determine how many sigma and pi bonds are in a structure. We then look at factors that affect bond length and bond strength (atomic radius and type of bond). 0:00 What are sigma bonds 1:38 What are pi bonds 3:47 How to tell how many sigma and pi bonds are in a structure 4:47 Practice example for determining sig...
Lesson on Wave Calculations: Wavelength, Frequency, and Energy and AP Chemistry Calculations
Переглядів 446Рік тому
In this video, I go through an introductory lesson on the wave behavior of light. This includes the characteristics of wavelength and frequency and details about the electromagnetic spectrum. We then look at the two wave equations on your AP Chemistry formula sheet, which include: c = λv E = hv 0:00 - introduction 1:39 - wave characteristics wavelength and frequency 4:56 - Electromagnetic spect...
Atomic Mass of Aluminum Lab - Virtual Lab
Переглядів 149Рік тому
This is a video that shows the equipment, set up, lab experiment, and measurements for the atomic mass or molar mass of aluminum lab (collecting a gas over water experiment).
Atomic Mass of Aluminum Lab - Walking through the Calculations and Sources of Error
Переглядів 219Рік тому
In this video, we will walk through the calculation to find the atomic mass, or molar mass, of aluminum based on the data collected in the lab. We then discuss various sources of error and the effect each would have on the calculated molar mass. For the experiment and data, see the video: ua-cam.com/video/2DAwnARNFac/v-deo.html
Electrolytic Cell Tutorial Part 2: Electrolytic Cells with Aqueous Solutions (Will Water React?)
Переглядів 4862 роки тому
Electrolytic Cell Tutorial Part 2: Electrolytic Cells with Aqueous Solutions (Will Water React?)
How to Draw Simple Lewis Structures - Based on Number of Valence Electrons (Octet Rule) Tutorial
Переглядів 2592 роки тому
How to Draw Simple Lewis Structures - Based on Number of Valence Electrons (Octet Rule) Tutorial
Electrolytic Cell Tutorial Part 1 - Electrolytic Cell Diagrams and Calculations
Переглядів 7042 роки тому
Electrolytic Cell Tutorial Part 1 - Electrolytic Cell Diagrams and Calculations
Voltaic Cells Tutorial Part 2 - Reduction Potentials, Ecell (volts), and ΔG (Gibbs)
Переглядів 1572 роки тому
Voltaic Cells Tutorial Part 2 - Reduction Potentials, Ecell (volts), and ΔG (Gibbs)
Voltaic Cells Tutorial Part 1 - How to Model a Voltaic Cell and How the Diagram Works!
Переглядів 3112 роки тому
Voltaic Cells Tutorial Part 1 - How to Model a Voltaic Cell and How the Diagram Works!
Strong Acid - Strong Base Titration Curve and pH calculations | SA SB Titration Tutorial
Переглядів 5142 роки тому
Strong Acid - Strong Base Titration Curve and pH calculations | SA SB Titration Tutorial
How to determine if a Salt is Acidic, Basic, or Neutral AND find the pH | Tutorial
Переглядів 1 тис.2 роки тому
How to determine if a Salt is Acidic, Basic, or Neutral AND find the pH | Tutorial
How to Compare the Strength of Binary Acids and Tertiary Acids | How Structure Affects Acid Strength
Переглядів 2132 роки тому
How to Compare the Strength of Binary Acids and Tertiary Acids | How Structure Affects Acid Strength
Introduction to Equilibrium and the Equilibrium Constant (Unit 7)
Переглядів 2072 роки тому
Introduction to Equilibrium and the Equilibrium Constant (Unit 7)
How to use Le Chatelier's Principle to Predict Reaction Shift and Concentration Changes
Переглядів 3912 роки тому
How to use Le Chatelier's Principle to Predict Reaction Shift and Concentration Changes
Beer's Law - What is Beer's Law and How to do Problems relating to it!
Переглядів 1,9 тис.2 роки тому
Beer's Law - What is Beer's Law and How to do Problems relating to it!
How to Use Bond Energies (or Bond Enthalpies) to Calculate ΔH
Переглядів 3052 роки тому
How to Use Bond Energies (or Bond Enthalpies) to Calculate ΔH
Entropy and Spontaneity | Entropy Explained | How to Determine Delta S, ΔS | AP Chemistry Tutorial
Переглядів 3732 роки тому
Entropy and Spontaneity | Entropy Explained | How to Determine Delta S, ΔS | AP Chemistry Tutorial
What Is Gibbs Free Energy ΔG | What is Thermodynamically Favorable | Calculate Delta G AP Chemistry
Переглядів 7712 роки тому
What Is Gibbs Free Energy ΔG | What is Thermodynamically Favorable | Calculate Delta G AP Chemistry
Heats of formation: What's a formation reaction and how to find ΔH from heats of formation
Переглядів 3243 роки тому
Heats of formation: What's a formation reaction and how to find ΔH from heats of formation
thank you for the quick recap 😀
I don't understand how oxygen is=O2
Very helpful 😊
Thank you! So happy you found it to be helpful!
What about a standard condition of 14.7psi and 60°F
Hi! To convert between moles and volume with any other other temperature and pressure condition, I recommend using the ideal gas law equation (PV=nRT) and plugging in the appropriate temperature and pressure (you may have to convert units depending on which R value you use).
The explanation about being the easiest to oxidise or reduce was really helpful!
Thank you!! I'm so glad that you found it to be helpful! Let me know if there's anything else I can help with!
I took hours studying this, she explains it the best you get learnt it in 10 min
Thank you so much! I'm so happy that my explanation helped you! Let me know if there's anything else you need help with!
saved me for my finals! thank you so much!
I'm so happy that it saved you for finals! I hope you rocked them!
2024 now and this explanation is wonderful as a summary before my exam thank you so much!!!
Thank you so much!! I'm so happy that it helped you with your exam! I hope you rocked it :)
You are so fantastic for the formulas!! Thank you so much for your excellent directions with the math and equations, I can't believe how fast i understand your directions.
Thank you so much!! I'm so happy that you found it helpful and thank you so much for the sweet comment!
Mrs. Cash, i have a homework where i have to fund the molecular formula. I saw the vid u posted three years ago on it but in the question u did the molecular mass was given but for my homework its not given how do i find it?
I tried doing the molar mass formula to find it but then it becomes 119.5/119.5 which doesn’t look right
I tried doing the molar mass formula to find it but then it becomes 119.5/119.5 which doesn’t look right
The question is ( An compound on analysis was found to contain 10.6 percent carbon 0.84 percent hydrogen and 89.10 percent chlorine. What will be the empirical formula and molecular formula of the substance ) - i have already found the empirical formula which is CHCl3 but i cant find the molecular formula
If K isn’t equal to 1, why does the delta G still have the standard symbol?
Mrs.cash, I’m a student in korea I love you so much, other videos did not tell me things like this(like the shortcuts), and it’s so well organized. I can’t understand my chemistry teacher even he is saying in my language I can understand your language better haha. Anyway thanks.(that was my longest comment I have written😅) thanks, love you with all my heart❤❤
You are so welcome! I'm so happy to help! If there's any other topic you need help with, feel free to reach out :)
Hands down the best video that actually explained everything! Thank you so much, this helped a lot for my test tomorrow
That makes me so happy to hear!! Thank you so much!! :) SO happy I could help!
thank you !
You're so welcome! :)
your formula for finding formal charge is so easy and makes it much faster for me than an other valence - non bonding - 1/2 (bonding) omg
Thanks so much! I try to simplify things where I can! :)
Hello Mrs, I just find your channel and watched 2 of your videos. Very well explained in a clean and professional presentation. I am not one of your class students, just want to take the time to thank you and letting you know that you help my chem's learning. Wish you and your students an happy coming spring. Pat
Thank you so much for telling me that, I appreciate that so much! Let me know if there's anything I can do to help if you have any questions!
you’re a life saver teach. thank you so much
You are so welcome! I'm so glad this could help you out!
Thank you so much for posting these videos!!
You're absolutely welcome! So glad I could help!
This is so helpful thank you so much!
You're absolutely welcome! So glad you found it to be helpful!
Thank you so much ❤❤
You are so welcome! :)
Thank you
You're absolutely welcome! :)
wtf are these comments
haha. During the covid year, I had my students comment with their initials in an asynchronous assignment as a way of showing that they watched the video.
Congrats!! Great video, made clear dimensional analysis and different measure units in a great manner. Thanks a lot!! ❤
Thank you so much for your kind words! I'm so happy you found it helpful!
🤑🤑🤑🤑🤑🤑🥰🥰🥰
Thank you! :)
Thank you 🙏
You're absolutely welcome!
GG
haha yes keep the trend going :)
The video is a little quite
Turned the volume all the way up, still difficult to hear! Too bad.
thank you better than so many vids
Thank you so much! I so appreciate that! Let me know if there's any other topics you need help with!
thanks, very nice video!
Thank you so much! So glad you enjoyed!
i love you
Aw thank you!! :) So happy I could help! Sending love back!
how would u write one with a compound that contains more than just c, h, and o? im currently struggling with writing LiCH3 😭
👎👎👎👎👎👎👎👎👎👎👎👎👎👎😑😑😑
speak up please
P r o m o S M 🙌
Thanku ❤
What if the graph is increasing
Helped, thanks.
You're welcome! So happy I could help!
Thank you so much 🤝♥️
You're totally welcome!
YOU ARE THE GOAT
haha thank you!
@@MrsCash i got a 98 on my chem final thank you!
This was so useful and well explained: thank you so much!
Thank you so much for compliment! I 'm so happy I could help!
Hi Mrs cash, how do you find the average value in the graph ?
A potential is applied to the cell, the current is the response.
Thank you this really helped 🙏🙏
I'm so glad this helped! :)
life save thank you, i have an exam tomorrow and needed to watch this!
So happy I can help! I hope you had success on your exam!
Thank you!
You're welcome!
tank u so mach i like it
You're absolutely welcome! So glad you liked!
Thank you so much, I have an awful teacher and u just explained it perfectly
So happy I could help! :) I hope you have a better experience with it now!
These videos have been very helpful for my AP Chem students. Do you happen to have the notes that you use in the video, so that my students could also fill in as they watch?
You have no idea how much this helped Thank you soo much!
I'm so happy to hear that and so happy that I could help! Thank you!