It gets always talked about the addition of a strong acid or strong base to a buffer... my question would be how to calculate the ph with the addition of a weak acid?? Lets say the addition of acetic acid to a phosphate buffer
If I understand correctly, to calculate which surfactants and proprotions I want for a product, I must know the desired HLB and then select surfactants that togoether achieve it? Would HLB of 9 be for something like face wash?
How did you obtain the W/O and O/W densities? I can’t wrap my mind around it since you have the same ratio of components but the value changed so drastically.
I love you miss thank you for this shirt formula it made my exam very easier than my teacher way
Please why did you use - 0.05 for the acid
great stuff!
What if the added concentration of NaOH is larger than 0.2 when subtracting it will produce a negative?
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I thought you will add the pka + the log but, you minus it
The 6 and the 4 numbers are from the calculus formula or it's the 60 of the water phase and the 40 of the oil phase?
How did you get that 0.30
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No way... I needed to calculate 4.7 and 14.9 too. That's just crazy
You comitted mistake as you plugged in number of moles in Henderson Husselbatch equation
It's still correct because the volumes given for acid & base are different.
i finally understood buffers...thank you
Thanks so much
Good madam
Why did you change the HLB value of the oil in W/O
What if u have been asked to find the ph when given constant volume and two moles
May I know how you got 10 at 2:57?
No of log is common so base is 10 😊
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Hello Marcy! Your channel is great! Could you share a paper about this cslculations? Regards
This is the only video which helped me understand these questions thanks a bunch!
What is the name of this app used in conducting online class
Thanks 🙏
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Calculation very easy
It was a much better video
Superb explanation
Thanks
Thanks a lot,love from Bangladesh
Thank u u're life savor
this is great
Plz why there is not arabic translation??😭💔
how did we get 10/1 as an answer ?
Same question
we need to find the log of what gives one. we know that log of 10 is equal to 1, hence the ratio of base/acid should be 10, making the ratio 10/1
you need to do antilog because you dont need log there as ratio is the only division
It's a ratio . She was just trying to write the answers in a ratio form 😊
Thanks
It gets always talked about the addition of a strong acid or strong base to a buffer... my question would be how to calculate the ph with the addition of a weak acid?? Lets say the addition of acetic acid to a phosphate buffer
Thank you for your lecture. It's really helping for me.
Amazing !! It really helped me
If I understand correctly, to calculate which surfactants and proprotions I want for a product, I must know the desired HLB and then select surfactants that togoether achieve it? Would HLB of 9 be for something like face wash?
thank you so much
Thank you so much i understand very well
where did you get the 0.30?pls explain
log(0.1 / 0.2) = approximately -0.30
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هي ليه طرحت 0.2-0.05في الدقيقة 4:58
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How would you prepare a 50 mL buffer using 0.5 M acetic acid and 0.4 M NaOH. Target pH is 4.3.
What is pKa of solution?
Thank youuuuu 💗
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Excellent
Pka is acid dissociation constant which is used to indicate the strength of an acid
Do you have any reference to the used formula for the minimal surfactant amount?
How did you obtain the W/O and O/W densities? I can’t wrap my mind around it since you have the same ratio of components but the value changed so drastically.
Same issur for me too
Still trying to discover since I saw this video lol
Lucid explanation. Thank you very much.
Could you do another video with more problems ?