Just to clarify: does the solution of unknown concentration always go in the burette? (BTW, I just wanted to say a thank you for these wonderful videos - it is clear a lot of time and effort went into them and I am incredibly grateful that they are free of charge as well. You are an amazing man and a fantastic teacher. Thank you.)
Hi MaChemGuy sorry to disturb you again but I had another question. Why did you divide the mols needed in 250 cm^3 by 4 because I didn't see anywhere where it was made clear that a volume of 1 dm^3 was mentioned? Please let me know. Thanks!
I take it you're referring to the making up of the standard solution. Since that's made up in a 250cm3 volumetric flask only a quarter of the moles per dm3 is needed.
because no acid was used before thus doesn't need to be washed with a dil acid, also the water means that all of the component is transferred to the beaker. Hope that helps x
@@jds5142 no you would still use distilled water, because distilled water doesn’t affect the concentration of base (the no of moles stay the same) thats why we use it to transfer all of the base that is to be reacted
@@Username-wq7rb Though to be fair, you should really wash it twice with distilled water and then once with the acid or base, depending on what goes in the burette.
Just to clarify: does the solution of unknown concentration always go in the burette?
(BTW, I just wanted to say a thank you for these wonderful videos - it is clear a lot of time and effort went into them and I am incredibly grateful that they are free of charge as well. You are an amazing man and a fantastic teacher. Thank you.)
Not necessarily. Usually does though.
Thanks, really appreciate your kind words. Good luck!!
Also these PAG videos are amazing! Thank You!
Glad you like them!
@@MaChemGuy No MaChemGuy to be honest I didn't like them... I loved them 😀😀😀👍👍👍
Hi MaChemGuy sorry to disturb you again but I had another question. Why did you divide the mols needed in 250 cm^3 by 4 because I didn't see anywhere where it was made clear that a volume of 1 dm^3 was mentioned? Please let me know. Thanks!
I take it you're referring to the making up of the standard solution. Since that's made up in a 250cm3 volumetric flask only a quarter of the moles per dm3 is needed.
@@MaChemGuy Ah thanks sir I get it now!
@@MaChemGuy why is only a quarter of the moles/dm3 needed?
@@sofiaa1945 because moles/dm3 is the number of moles needed per 1000 cm3. Solution made up in 250 cm3 (a quarter)
whats the likelihood of the pag stuff to be in paper 3???
Haris Shakeel Quite High
Why do you rinse the burrette with distilled water and not acid?
because no acid was used before thus doesn't need to be washed with a dil acid, also the water means that all of the component is transferred to the beaker. Hope that helps x
@@lawrencepettifer4102 3 years later, but if the base was in the burette instead of the acid you would rinse it with the base instead, right?
@@jds5142 no you would still use distilled water, because distilled water doesn’t affect the concentration of base (the no of moles stay the same) thats why we use it to transfer all of the base that is to be reacted
@@Username-wq7rb Though to be fair, you should really wash it twice with distilled water and then once with the acid or base, depending on what goes in the burette.
@@emmas4466 But we can’t add the acid or base rinsings back into our solution,it’ll affect the concentration
What about uncertainties?
Percentage uncertainties?
❤❤❤
thank you!!!!
layla you're welcome