We'll learn how to calculate percent composition by mass, and we'll work through a number of practice problems. To calculate percent by mass, you need to determine two things: the mass of just the element, and the molar mass of the whole compound. Then, you take the molar mass of just the element and divide it by the molar mass of the whole compound, and multiply by 100%.
Views: 660176 Tyler DeWitt
This chemistry video tutorial explains how to find the empirical formula given the mass in grams or from the percent composition of each element in a compound. If you're given the mass percent, you can simply treat it as if you were given the mass in grams. This video explains how to find the molecular formula given the molar mass of the compound. You can do this once you have the empirical formula. This video explains all of it. It has plenty of practice problems and examples for you to master this lesson. New Chemistry Video Playlist: https://www.youtube.com/watch?v=bka20Q9TN6M&t=25s&list=PL0o_zxa4K1BWziAvOKdqsMFSB_MyyLAqS&index=1 Access to Premium Videos: https://www.patreon.com/MathScienceTutor
Views: 126467 The Organic Chemistry Tutor
The empirical formula of a copper chloride hydrate is determined. First the water molecules are removed through heating and the crystals change color from blue to brown. Next the copper is removed by a displacement reaction with aluminum and the copper metal is separated by filtration, washing and drying.
Views: 14098 Scott Milam
▶ This video channel is developed by Amrita University's CREATE http://www.amrita.edu/create ▶ Subscribe @ https://www.youtube.com/user/amritacreate http://www.youtube.com/amritavlab ▶ Like us @ https://www.facebook.com/CREATEatAmrita ▶ For more Information @ http://vlab.amrita.edu/index.php?sub=2&brch=190&sim=339&cnt=1 ▶ Amrita Virtual Lab Project website http://vlab.amrita.edu Ostwald's viscometer is a traditional viscometer to measure the viscosity of a liquid. It is a U-shaped glass tube. In one arm, the bulb A is connected with a fine capillary. The lower end of capillary is connected with a U-tube provided with a bulb B in the second arm. The bulb is necessary to maintain the hydrostatic pressure during flow of liquid. Through the capillary tube, the liquid flows with measurable speed. There are two marks C and D above and below the bulb A. The liquid flows under its own weight.
Views: 312011 Amrita Vlab
This video provides a discussion of how to calculate percent composition from mass data.
Views: 12747 Noel Pauller
calculations and conclusions on finishing the empirical formula lab.
Views: 10003 turdfurg67
This video demonstrates how to calculate the percent water in copper (II) sulfate pentahydrate by analysis of its chemical formula. Other Stoichiometry videos: Sandwich Stoichiometry - https://goo.gl/Cq3AKx Calculating Empirical Formulas - https://goo.gl/1GBQJB Calculating % Water of a Hydrate - https://goo.gl/hbTfYZ Empirical Formula of a Hydrocarbon - https://goo.gl/PxS2KK Formula Units of Magnesium Chloride - https://goo.gl/dMYkA8
Views: 35274 Noel Pauller
Shot by Paul J. Ramsey, Media Resources, Eastern Kentucky University.
Views: 6368 Paul Ramsey
Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book More free lessons at: http://www.khanacademy.org/video?v=_H009sTvYE0
Views: 266802 Khan Academy
https://getchemistryhelp.com/learn-chemistry-fast/ This lesson demonstrates how to determine the percent composition of a compound by calculating the total mass of each element and comparing it to the total molar mass of the compound.
Views: 33848 GetChemistryHelp
We'll learn how to calculate molecular formula for a compound when you are given its empirical formula and its molar mass. In order to do this, you need to figure out what to multiply the empirical formula by to get the molecular formula and the correct molar mass. The multiple can be determined by dividing the molar mass of the compound by the molar mass of the empirical formula.
Views: 745666 Tyler DeWitt
Calculating the molecular mass and molecular weight of water. Watch the next lesson: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/v/common-polyatomic-ions?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Missed the previous lesson? https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/v/empirical-molecular-and-structural-formulas?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Chemistry channel: https://www.youtube.com/channel/UCyEot66LrwWFEMONvrIBh3A?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 349165 Khan Academy
This is a simple example of how to proceed in the calculation of percent composition by mass of a simple molecule. The molar mass of propane is calculated followed by the contribution made by each element that composes it.
Views: 956 Massimo Bozzi
Hi, we're Dhania and Diandra from Sekolah Bogor Raya. Here's an experiment that we did during our Chemistry lesson, in which we're trying to determine the molecular formula of a hydrated copper sulfate. Your likes and comments would mean so much to us :)
Views: 10649 Dhania Salsha
This video shows you how to calculate the theoretical and percent yield in chemistry. The theoretical yield is the maximum amount of product that can be produced in a reaction. The percent yield is equal to the actual yield divided by the theoretical yield times 100%. Subscribe: https://www.youtube.com/channel/UCEWpbFLzoYGPfuWUMFPSaoA?sub_confirmation=1 General Chemistry Playlist: https://www.youtube.com/watch?v=bka20Q9TN6M&list=PL0o_zxa4K1BV-uX6wXQgyqZXvRd0tUUV0&index=3 Access to Premium Videos: https://www.patreon.com/MathScienceTutor Facebook: https://www.facebook.com/MathScienceTutoring/
Views: 632054 The Organic Chemistry Tutor
If you're given the Percent Composition of a compound, you can find the Empirical Formula for it. I have the shortest method ever to do it, although it's not a "full solution" like your teacher probably asks for. 1. Divide each % by the atomic mass of the element 2. Divide each of THOSE answers by whatever's smallest 3. Adjust these numbers into their lowest whole-number ratio. Check me out: http://www.chemistnate.com
Views: 598004 chemistNATE
To find the percent composition (by mass) for each element in MgO we need to determine the molar mass for each element and for the entire MgO compound. We’ll use the following formula for percent composition by mass: Percent Composition by Mass = (Molar Mass of Element x Number of that Element)/ Molar Mass of Compound In this video I’m using a Periodic Table that rounds to two decimal places. You may be asked to use a Periodic Table with more decimal places, however the process to find the percent composition by mass is the same. Molar Mass in Three Easy Steps: https://youtu.be/o3MMBO8WxjY Note: MgO is also known as Magnesium oxide.
Views: 526 Wayne Breslyn
This chemistry video tutorial explains how to calculate the molarity of a solution given the mass of the solute and the volume of the solution. It also discusses how to calculate the molarity given the mass percent and density of the solution. The last problem illustrates to how calculate the molarity given the density and the molality of the solution. There's plenty of practice problems to work on in this tutorial. New Chemistry Video Playlist: https://www.youtube.com/watch?v=bka20Q9TN6M&t=25s&list=PL0o_zxa4K1BWziAvOKdqsMFSB_MyyLAqS&index=1 Access to Premium Videos: https://www.patreon.com/MathScienceTutor Facebook: https://www.facebook.com/MathScienceTutoring/
Views: 42534 The Organic Chemistry Tutor
webpage-http://www.kentchemistry.com/links/Math/BPFPmm.htm This short video shows you how to calculate the molar mass of a nonelectrolyte (van't hoff=1) using freezing point depression. Example Question: The freezing point of a solution that contains 1.00 g of an unknown compound, dissolved in 10.0 g of benzene is found to be 2.07oC. The freezing point of pure benzene is 5.48 oC. The molal freezing point depression constant of benzene is 5.12 oC /molal. What is the molecular weight of the unknown compound?
Views: 50552 kentchemistry.com
Molar Volume of a Gas Pre Laboratory experimental procedure for the Dawson College NYA General Chemistry pre university course. In this experiment the standard molar volume of hydrogen gas will be determined. The gas, produced from the reaction of excess hydrochloric acid with magnesium, will be collected by water displacement. The observed molar volume for the hydrogen gas will then be converted to the corresponding molar volume at STP and the result compared with that of an ideal gas.
Views: 5229 Dawson College Chemistry Department
Get your free Ultimate Chemistry Cheat Sheet here: https://www.chemin10.com/optin?ims=lekwc&utm_source=YT+Percent+Composition The percent composition of each element in glucose is found by taking the molar mass that each element contributes to the molar mass of glucose, and dividing that mass by the molar mass of an entire mole of glucose, and then multiplying by 100.
Views: 3985 CheminTen
Avner Kreps's and Ben Fearon's presentation for the Determining Molar Mass Through Titration lab.
Views: 5151 Avner Kreps
Please watch and comment on my video lab I created. I am trying to get an idea of how I could use video labs with my chemistry course or website. I guess this would be good for students who are out of school for long periods of time, schools without chemicals, lessons when a teacher is out or something else. Please let me know what you think. About the experiment This experiment is intended to introduce students to hydrated compounds. These compounds have water molecules coordinated in their chemical structures. Examples CuSO4*5H2O, BaCl2*2H2O, and NaC2H3O2*3H2O. Notice each formula has a "*" between the compound's formula and the number of water molecules that are coordinated in the structure. the "*" represents a weak chemical bond known as a hydration bond. This bond is usually easily broken by heating the compound.
Views: 49189 kentchemistry.com
Confused about molarity? Don't be! Here, we'll do practice problems with molarity, calculating the moles and liters to find the molar concentration. We'll also have to use conversion factors to convert between grams and moles, and between milliliters and liters.
Views: 1005686 Tyler DeWitt
This chemistry video tutorial focuses on molarity and dilution problems. It shows you how to convert between molarity, grams, moles, and liters. It's very useful for students learning solution stoichiometry. This video contains plenty of notes, examples, equations / formulas and practice problems. Here is a list of topics: 1. How to calculate the Molarity of the solution given grams, moles, volume in ml or liters. 2. Determining the mass given the concentration in molarity and the volume in milliliters. 3. Using unit conversion / dimensional analysis to calculate the volume of the solution in mL. 4. Solute, Solvent, Solution Relationship 5. How to increase and decrease the concentration of a solution by adding water or removing water through dilution or evaporation. 6. Molarity and Dilution Problems - M1V1=M2V2 7. Solution Stoichiometry - Actual Yield, Theoretical Yield, and Percent Yield 8. Molarity Stoichiometry - Limiting and Excess Reactant 9. How To Find The Amount of Excess Reactant Remaining / Left Over in Volume in mL, Mass in grams, and moles 10. Single Replacement Reactions - Metal and Halide Displacement - Activity Series 11. Predicting the products of a double replacement reaction - acid base neutralization and precipitation reactions 12. How to calculate the maximum amount of product / theoretical yield given molarity, volume, and grams of the reactants 13. Basic Dilution Calculations 14. Using the Dilution Formula / Equation M1V1=M2V2 to solve acid base titration problems and redox reaction titrations 15. Mixture Problems - Finding the Molarity after mixing two or more solutions
Views: 151500 The Organic Chemistry Tutor
The complete procedure for the empirical formula lab is shown.
Views: 1114 Dr. Richard Musgrave
To see all my Chemistry videos, check out http://socratic.org/chemistry Lots and lots and lots of practice problems with mole ratios. This is the first step in learning stoichiometry, for using a chemical equation to get mole ratios and using conversion factors and dimensional analysis on products and reactants.
Views: 1046373 Tyler DeWitt
This chemistry video tutorial shows you how to determine the empirical formula from percent composition by mass in grams. This video also shows you how to determine the molecular formula from the empirical formula using the combustion analysis technique of a compound. This video contains plenty of examples and practice problems that can help you on your next upcoming worksheet assignment / quiz. Here is a list of topics: 1. Empirical Formula - Lowest Whole Number Ratio 2. Finding the empirical formula from mass in grams 3. Determining the empirical formula using percent composition by mass 4. Calculating Molecular Formula From Empirical Formula Using Molar Mass 5. Combustion Analysis - Compound with 2 elements - Carbon & Hydrogen 6. Empirical Formula From Combustion Analysis - 3 Element Compound - Carbon, Oxygen, and Hydrogen 7. Decimal Ratio Subscripts & Fractions - Converting to whole numbers
Views: 70926 The Organic Chemistry Tutor
This video demonstrates finding the formula of a hydrate salt. Visit https://sites.google.com/site/dcaulfssciencelessons/ for more!
Views: 24100 dcaulf
Explanation of how to find the molar mass of MgSO4 - 7H2O (Magnesium Sulfate Heptahydrate). A few things to consider when finding the molar mass for MgSO4 - 7H2O: - make sure you have the correct chemical formula. - always include the units for molecular weight (grams/mole). - make sure you do the math right - follow the order of operations. Note that molecular weight, molar mass, and gram formula mass are all the same thing. Get more chemistry help at http://www.thegeoexchange.org/chemistry
Views: 9187 Wayne Breslyn
Chemists need stoichiometry to make the scale of chemistry more understandable - Hank is here to explain why, and to teach us how to use it. Table of Contents Atomic Mass Units 2:24 Moles 5:12 Molar Mass 5:59 Equation Balancing 8:45 Molar Ratios 11:11 Crash Course elsewhere on the internet: http://www.facebook.com/YouTubeCrashCourse http://www.twitter.com/TheCrashCourse http://thecrashcourse.tumblr.com References and image licenses for this episode can be found in the Google document here: http://dft.ba/-51j2 Support CrashCourse on Subbable: http://subbable.com/crashcourse
Views: 2282615 CrashCourse
This is the first in a series of 3 lessons about the interpretation of electron impact mass spectra. This video was created for a university course in instrumental analysis in chemistry. Spectra were taken from http://webbook.nist.gov/chemistry/ and used with permission. The isotope calculator mentioned in the video can be found at http://www.sisweb.com/mstools/isotope.htm
Views: 149745 Gary Mabbott
The following video looks at calculating concentration of solutions. We will look at Sample problems dealing with mass/volume percent (m/v)%. For more Senior Chemistry podcasts, search "Papapodcasts" on iTunes. Thanks for watching.
Views: 105019 Papapodcasts