Concentration and Molarity explained: what is it, how is it used + practice problems

Рет қаралды 147,835

Күн бұрын

What is concentration, how does molarity measure concentration, and how can we use molarity in calculations to find specific amounts of ingredients to make solutions of a specific volume and concentration?
This video includes four practice problems on how to calculate molarity and how to use molarity to find specific amounts of solute or volume to be used for a needed concentration (molarity).
There are also sporadic non-sequiturs, both verbal and visual, to add some enormous levity to the proceedings, for the approbation of all concerned.
CC Academy videos are easy 101 crash course tutorials for step by step Chemistry help on your chemistry homework, problems, and experiments:
- Solution Stoichiometry Tutorial: How to use Molarity
- Stoichiometry
- Quantum Numbers
- Rutherford's Gold Foil Experiment, Explained
- Covalent Bonding Tutorial: Covalent vs. Ionic bonds
- Metallic Bonding and Metallic Properties Explained: Electron Sea Model
- Effective Nuclear Charge, Shielding, and Periodic Properties
- Electron Configuration Tutorial + How to Derive Configurations from Periodic Table
- Orbitals, the Basics: Atomic Orbital Tutorial - probability, shapes, energy
- Metric Prefix Conversions Tutorial
- Gas Law Practice Problems: Boyle's Law, Charles Law, Gay Lussac's, Combined Gas Law
- Ionic Bonds and Compounds
- Chemical reaction types
- product prediction for specific reaction types
- Surface Tension
- what is heat
- what is fire
- The Bohr Model of the Atom
- Organic Molecules and the Versatility of Carbon
- Hybrid Orbitals-- Valence Bond Theory
- Ideal Gas Law and Gas Density

Пікірлер: 93

@talha4974 2 жыл бұрын

After being confused on this for like 2 hours, I now understand it in 5 mins, thank you!

@CrashChemistryAcademy 2 жыл бұрын

😊

@ashleybroussard9039 5 жыл бұрын

Your graphics make it quick and to the point. Thanks much!

@jarretberenson1214 5 жыл бұрын

beautifully done. Thanks!

@martha-norajean-francois9941 3 жыл бұрын

I can't thank you enough! Just the way you explained it. Thank you!

@CrashChemistryAcademy 3 жыл бұрын

I'm glad it helped!

@morganb1844 2 жыл бұрын

Awesome video, this makes much more sense. Thank you so much.

@bobbleheadgary 4 жыл бұрын

beautiful! thanks for posting!!

@laurenhickey6274 3 жыл бұрын

wow, imagine not understanding this when taught it over 2 days and then watching a 5 1/2 min video and being a pro at it.

@fadil9229 4 жыл бұрын

thank you sir this explanation was fantastic, really appreciated.

@CrashChemistryAcademy 4 жыл бұрын

Thanks, I appreciate your comment.

@fadil9229 4 жыл бұрын

@@CrashChemistryAcademy no problem sir

@waseeahmed1596 3 жыл бұрын

Thanks man. I was really struggling in this topic

@hectorgonzalezvaldes945 3 жыл бұрын

¡Qué buen video! Entretenido y al grano. ¡Felicidades!

@CrashChemistryAcademy 3 жыл бұрын

Muchas gracias, agradezco tu comentario!

@ceeyar2003 4 жыл бұрын

Understood well. Thanks!

@lspmagflux9296 2 жыл бұрын

Wonderful explanation and your methodology is amazing and works pretty well for me. Thank you very much.🙏

@CrashChemistryAcademy 2 жыл бұрын

Thanks!🙂

@madjedbebeaesara5296 3 жыл бұрын

Excellent presentation!

@raymondteng8357 3 жыл бұрын

Nice vid! This just help my chem so much!!

@CrashChemistryAcademy 3 жыл бұрын

You're welcome!

@sumondas5330 3 жыл бұрын

Thank you..was very helpful.

@mariacabrera1689 4 ай бұрын

Great video! Ready for my Chem exam tmr

@alexandrashields2600 3 жыл бұрын

Thanks so much. So easy to understand!! :-)

@dyingoldman2312 9 ай бұрын

Makes perfect sense, thanks!!

@Joe-je1vx 2 жыл бұрын

thank you this helped clear things up

@husameltigani4310 5 жыл бұрын

Thank you. You are always make everything easy to be understood. I would like to ask you to explain the idea when we see a percentage in some chemical products. For example 3.5 % Sodium Chloride. Sometimes also we find 99.9% NaCl or 70 % Nitric Acid. So how to make those things related to Molarity. Thank you again

@CrashChemistryAcademy 5 жыл бұрын

percent is either volume/volume (v/v), which is volume of solvent per volume of solution, or mass/mass (m/m), mass solute per mass of solution, or mass/volume (m/v), mass solute/volume solution. Commercial products often do not say which type of percent they are using. The 3.5% NaCl is likely m/v, so that would be 3.5 g NaCl dissolved in a total volume of 100 mL solution. You can see that this is not a very good measure since 100 mL of solution is not = 100 g, and so the percent does not make 100% sense, but that is very often how it is done. To get molarity you would simply find #mol NaCl in 3.5 g and divide by 0.1 L. The 99.9% NaCl just means there are 0.1% impurities in the preparation. Percent acids are a different story, since it is referring to a percent of the concentrated molar preparation. A concentrated solution of nitric acid is about 16 molar, and so 70% solution is 70% of 16 molar. On the other hand concentrated nitric acid comes out to about 70% m/m, so it may just be referring to that.

@abhiadusumilli7981 2 жыл бұрын

Thank You sooooooo Much!!!

@jeeshaanjoshi 3 жыл бұрын

Wish the questions they asked in exams were this easy. You could've increased the difficulty of questions exponentially as you progressed to give examples. Otherwise, really loved the video. Molarity explained in a nutshell. Great work !!

@CrashChemistryAcademy 3 жыл бұрын

Thanks and an interesting comment. I will put it on my list of videos to do. But it's a long list, so not sure when it will happen.

@savannahparrish7261 2 жыл бұрын

awesome Explanation

@fahadhussainwrites1889 Жыл бұрын

Very informative bro👍

@Makeartsall Жыл бұрын

Thank you so much mannnn You made my doubt crystal clear ❤ Thanks again ❤❤❤

@CrashChemistryAcademy Жыл бұрын

You're welcome!

@subbusivasubrahmanyam1483 2 жыл бұрын

What u done u r work on this video amazing for the even don't have aminimum awareness

@biniamwale576 3 жыл бұрын

It is so easy make it heavy unless and other ways continue your teaching Tnx

@chuckcarlson2314 4 жыл бұрын

nicely done

@husnainnaseer7962 Жыл бұрын

Made easy understanding😊

@fartuuncraxman9896 3 жыл бұрын

Thanks this vedio really I like it👍 😍

@syntacticcave9514 2 жыл бұрын

Amazing 👌👍🔥

@JJeev 2 жыл бұрын

danke! Tu bist der beste

@rafaelmera3865 3 жыл бұрын

Wow, nice video, I am from Ecuador, I like your video..

@CrashChemistryAcademy 3 жыл бұрын

Gracias!

@tearex7689 2 жыл бұрын

u are better than my chem tr

@beizong4052 4 жыл бұрын

quick and clean with no shit talking

@evanbritton4859 2 жыл бұрын

Brilliant

@Menna23326 3 жыл бұрын

Awesome

@albertopoli8896 5 жыл бұрын

Good evening , I’d a question . If I dissolve 5 mole of NaCl in one liter of water, I have a 1M solution : is it correct? But the sum of both volume ( water and salt) is higher than 1Liter. Could you explain me where I mistake?

@CrashChemistryAcademy 5 жыл бұрын

molarity is moles per liter of solution, not per liter of water. First, you would dissolve the 5 mole NaCl in less than one liter of water, about 800-900 mL because, as you said, the total volume will increase. Once all 5 moles have dissolved, you then add enough water to bring the total solution volume to one liter. You now have 5 moles dissolved per liter of solution. Does that make sense? Second, this would be a 5M solution, not 1M, since you have 5 mole/liter, not 1 mole per liter.

@albertopoli8896 5 жыл бұрын

Crash Chemistry Academy Many thanks

@reteenaann3431 11 ай бұрын

Thank you....

@CrashChemistryAcademy 11 ай бұрын

You're welcome!

@jagadishkishan3388 2 жыл бұрын

u earned a sub

@CrashChemistryAcademy 2 жыл бұрын

Thank you!

@asifshekh5420 3 жыл бұрын

Fabulous

@silliisubbii 2 жыл бұрын

Thanks man now ik

@qwertyheadphones2801 2 жыл бұрын

Sir thanks 😄😄

@CrashChemistryAcademy 2 жыл бұрын

You're welcome!

@suhaspatil111 4 жыл бұрын

Best

@mohammadwaseemsohail110 3 жыл бұрын

Great explanation Sir can you tell why you divided 42 grams in 2 question please..

@CrashChemistryAcademy 3 жыл бұрын

using molarity requires that we have moles, but the problem gives grams, not moles, so the molar mass is used to convert grams to moles. The molar mass (periodic table mass) of NaF is 23.0 + 19.0 = 42.0 g/mol. For NaF, there are 42.0 grams in every mole of NaF, which is what the periodic table masses tell us. Dividing by that converts grams to moles.

@mohammadwaseemsohail110 3 жыл бұрын

Thank you very for your wonderful reply

@CrashChemistryAcademy 3 жыл бұрын

@@mohammadwaseemsohail110 You're welcome. You may want to view my video on mole conversions, which gives you a more in depth understanding of molar mass, the periodic table, and mole conversions: kzfaq.info/get/bejne/qpegnaqT3NfYaaM.html

@biswajitdutta9929 2 жыл бұрын

Love from India

@CrashChemistryAcademy 2 жыл бұрын

Love to India! 💖

@harshitagadavarthi1373 4 жыл бұрын

Can someone explain Me y did we multiply it here 3:45

@CrashChemistryAcademy 4 жыл бұрын

The question asks for moles but gives liters. The multiplication allows you to cancel liters and end up with moles.

@science_dar3022 4 жыл бұрын

Wonderful

@CrashChemistryAcademy 4 жыл бұрын

Thanks!

@JK-0423 8 ай бұрын

Holly shiiit I wish I could give him my tuition, instead of my univeristy of SF!!!

@CrashChemistryAcademy 8 ай бұрын

maybe split it?

@JK-0423 8 ай бұрын

@@CrashChemistryAcademy I strongly agree that they should split it with you.

@Puri_vyshu_Talks 2 жыл бұрын

2nd question ❓

@AmarSingh-uw7sm 3 жыл бұрын

Sir 58.5 g is this mass of nacl

@CrashChemistryAcademy 3 жыл бұрын

58.5 grams per mole is the molar mass of NaCl

@AmarSingh-uw7sm 3 жыл бұрын

Reply sir whenever you see my question

@Zak-qp5ln 3 жыл бұрын

Who's joe

@lilnugget2280 3 жыл бұрын

joe is the molar concentration now take an example we have 25.2 grams and volume 0.75 what is the molarity?

@Zak-qp5ln 3 жыл бұрын

@@lilnugget2280 Joe mama

@lilnugget2280 3 жыл бұрын

@@Zak-qp5ln NOOOOOO I HAVE FELL TO THIS TRAP AGAIN

@Zak-qp5ln 3 жыл бұрын

@@lilnugget2280 YOU FOOL

@lilnugget2280 3 жыл бұрын

@@Zak-qp5ln NOW IM MAD

@learnbymanikarna5498 4 жыл бұрын

How is watching on lockdown 👇

@CrashChemistryAcademy 4 жыл бұрын

There are always some who benefit from disasters. My channel hits have increased quite a bit since lockdown. So while teaching remotely is a drag, I at least get to look forward to seeing how my channel is doing.

@TheKartana 5 жыл бұрын

First!!!

@peterwalsh4530 5 жыл бұрын

First

@zekzimbappe5311 3 жыл бұрын

In my case i find that teachers make it seems like molarity is different from the concentration A lot of exercices go like this : We have Naoh,10M ........etc calculate the concentration And no its not 10 mol/l

@CrashChemistryAcademy 3 жыл бұрын

Not sure what the question would be asking, since 10M is the concentration, or also stated as 10 mol/L, as you said. It is exactly the same.

@ericwright8592 3 жыл бұрын

I think they want you to convert molarity to a concentration written as g/l. I remember back in high school they did that and it was confusing. They should just ask "how many grams of NaCl are in 1 liter of 10M NaCl?". Grams/liter or molar, it doesn't matter. Two ways of explaining the same thing. There are some substances where molarity doesn't quite make sense to use , like proteins which are often heterogeneous mixtures of many proteins with different molar masses. Almost nobody would say, I have a 1 molar solution of protein. It'd be mass per volume. mg/ml, ug/ul or g/l

@zekzimbappe5311 3 жыл бұрын

@@ericwright8592 yeah i figured it out at the end i was just in hurry back then ,i had an exam which made me confused glad i got 60.6% in that hell subject ( i have to go through the second exam after 20 days from now though )