Відео

thanks for the explanation

Thanks

Dietetics student here 😊 . Your videos are excellent. Very helpful.

Thank you so much. Excellent simplified explanation.

Thank you

IMPORTANT QUESTION: in what situation if ever are you able to solve for one of the two variables on the right side of the equation, that is, either c2 or v2?

Bro thank you I had to make a dilution lab and I forgot how this works you saved my butt thank you!

Thank you. I'm diluting rooting hormone to soak green giant arborvitae tree cuttings overnight. Now I know how to dilute my stock solution. I will successfully root my tree cuttings and sell them next year. You helped me make money grow on trees. Money really does grow on trees if you propagate and sell the right ones. Propagate and sell screening plants, hedge plants and ground covers. People usually by a lot more than 1 of these type of plants,

The mitochondria is the powerhouse of the cell

are the parents male or female i am confused as hell

very helfpul and clear thanks!

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Thank you 🙏🙏🙏

Hello and thank you for your great videos , i have a question please : when diluting a weak acid i noticed in the book that they use the dilution formula :C1V1=C2V2 based on the fact that the number of moles will stay constant , however for weak acid we know that upon adding water the dissociation of the weak acid increases to maintain balance and hence the number of moles of the weak acid decreases , so based on that how the dilution formula still applied?...thank you in advance.

Great video, thank you.

You said early that you can't cancel unit's but later you do

clearly explained

I don’t imagine you’ll see this comment but I am a bit confused with negative control. You said if you remove the IV then you don’t get the DV. but in the situation with the bugs and meat the cover was the IV so if you removed it you’d get an effect no?

❤️❤️

Thanks

Ty so much ....it helped me allot sir....keep it up ...make more helpful videos for us ...❤❤☺

"Scientist who guess are unemployed" lmaoo

In our institute we take AP chemistry and I am just in grade 9-ASP( Advanced Science program)

I just have trouble knowing what’s the c1 v1 and c2 v2 word problems confuse me 😥

why is this so confusing????

So useful 🙂

I thought Ketone has an attached Hydrogen not carbon ...

U r superb

Thanksss

Hey. Unfortunately the dilution equation can be applied only on molar concentrations. See Skoog : Fundamentals of analytical chemistry, 9th edition. page 75. " This equation is based on the fact that the number of moles of solute in the diluted solution must be equal the number of moles in the concentrated reagent.' For example: Let's say that you want to prepare 1 L of 15% H2SO4 solution (density: 1.095 g/mL) from 60 % H2SO4 (density 1.498 g/mL). We have to find out the volume needed. If we use the dilution equation we get that we need 250 mL of 60% H2SO4, but if we calculate correctly we obtain that we actually need only 182.7 mL. Here is the correct calculation: 15% means that 15 g H2SO4 is in 100 g solution. Using its density we calculate the solution's volume, that is V=m/d=100/1.095=91.32 mL. Next we calculate the amount of pure H2SO4 that is in 1L=1000 mL solution, which is going to equal 164.25 g pure H2SO4. Than we say that 60 g H2SO4 is in .......100 g solution 164.25 g H2SO4.........x = 273.76 g solution. And finally we transform the obtained mass into volume using it's density and the formula given earlier, so we get 182.7 mL, instead of 250 mL that we would get using the dilution equation.

Is this principle used in the manufacture of IV pharmaceutical solutions? They probably are since there's not much room for error

Thanks a lot

Thanks a lot

amazing! cleared out my doubt! thank u!

Why didn't you finish the serious of 4 😞 your videos really helped me! I need one on proteins at this moment in time.

thank you this video helped me a a lot !

very good explanation

I HAVE BEEN TRYING TO FIGURE OUT MY THREE POINT TEST CROSS PROBLEM FOR 3 HOURS AND YOU HAVE SAVED ME

how to find c2/vs

Language use English

In my school we take biology freshman year and chemistry sophomore lol

Actually I dont think the mistake at 12:56 was that you forgot to cross v and v+. I think you had them switched before they crossed because the results, CV-CT-V and +-+-+ matches the result from the table of values for 89 and 94. Great video, though! Thsnks!

So helpful!

you need better audio, just a recommendation

but ,sodium and potassium are positive charged ions How can the equilibrium potential of sodium positive charged and that of potassium is negative? explain ,please.

what about ethanol?

Thanks!

Hello Adam, Greeting to you from the UK, Great video I tried to copy the formula but I'm still too slow to grab your simplified teaching may be for various reasons. I wish you can help me here. Ok here is confusion, I'm trying to make a fertilizer stock solution of Mn in ppm I need Mn 0.8 ppm, in my final solution I do have a conversion factor i.e 4.061. so 0.8 times 4.061 = 3.2488, I take out the element purity of 90% which will be 3.2 *100/90 = 3.6. So this means I must have 3.6mg/l if I'm not mistaken. Now I want to make a stock solution 600x concentrate in a 50 liter tank, so 3.6*600 =2160 to convert into grams I /(divide) by 1000, so 3.6*600/1000 = 2.16gram . Am I right until now ? If I'm right I go a little further where the confusion begins and I need your precious help So my final solution tank is 3785liter and my stock solution of 600x concentration is 37.85 liter so do I need to take the 2.16grams *(times) 37.85 liter stock tank volume to get the total salt dissolved to make a 600x concentration which is 2.16*37.85 =81.756 or 81.8grams of salt for a 600x concentrate if this is correct please guide me further on how much of stock solution to add to make a final solution for a 3785liter tank of 0.8ppm? Adam I highly appreciate your time and your efforts in getting this solved for me as if I understand this I can work on a few more salts, I'm feeling very embarrassed with my breakdown but I rather put it simple for your understanding and more over for my understanding. Alternatively you can send me a reply on sidneyspleno13@gmail.com I thank you very much for your time and do look forward of your e-teaching. Sidney Rodrigues.

In the <F1 Cross> slide (3:35), why is there no recombination? The gametes produced just replicate exactly the parental chromosomes. Why, for example, is there no v+.cv+.ct+ or v.cv.ct+ gamete?

thank u😄😌😍