I had my practical yesterday and I'm so glad I came across your channel just before it. Thank-you so much for helping us students all over the globe(I'm from Pakistan). Your videos are really helpful and I can't thank you enough for making life easier for us all. *thumbs up*
dnxk kal it’s because the answer needs to be in terms of grams per dm3, and 1000cm3 is 1dm3. So she had the concentration in 25cm3, she multiplied by 4 to get the conc in 250cm3, then she multiplied by 4 to get 1000cm3 which is 1dm3. Hope this helps (:
YOU ARE OUR SAVIOUR!! so grateful that you make videos like that! They are so informative and easy to understand. ❤️
I had my practical yesterday and I'm so glad I came across your channel just before it. Thank-you so much for helping us students all over the globe(I'm from Pakistan). Your videos are really helpful and I can't thank you enough for making life easier for us all. *thumbs up*
great video, clears concept
helped me out for tomorrows practical
Thanks for saving my a level! Can you do videos on buffer calculations please?
This is excellent! Thank you
Thank you so much! This was such a helpful video!
Well explained and nice Voice
Also can you do some back titrations ?
Thank you so much!! :)
i dont understand whats actually going on in the titration, why doesnt the excess hydrogen ions interfere with our experiment?
Hydrogen ions from the acid are the catalyst
7.12 why did you x40???
x4 to get from 250-->1000 and x10
Thank you so much but i did not understand the calculation and the equation balance
Hey can you add some practise questions
hard to understand. where did she get 40?
Multiply by 10 to go from 25cm^3 to 250cm^3, and then by 4 to go from 250cm^3 to 1000cm^3
But you had already multiplied by 10 in the previous step?
@@teknitsma9553 I think it is because the question asks for grams per dm^3 so you had to convert it (1000cm in a dm)
lol I'm doing my GCSEs and ngl I'm so grateful I haven't hit a levels
Omggg I love you primrose xxx thank you
Dude, GCSEs are much harder than A levels (so I've heard)
I'm in A levels and it is already hard. Farless for GCSEs
I don’t get why you multiplied by 40
x10 to get from 25cm^3 to 250cm^3 then x4 to get from 250cm^3 to 1000cm^3
@@Primrose_Kitten why does it have to be converted to 1000cm^3 since it only states 250 in the question?
dnxk kal it’s because the answer needs to be in terms of grams per dm3, and 1000cm3 is 1dm3. So she had the concentration in 25cm3, she multiplied by 4 to get the conc in 250cm3, then she multiplied by 4 to get 1000cm3 which is 1dm3. Hope this helps (:
dnxk kal it’s because the question asked for it in g per dm3 so you would need to convert. If it doesn’t ask for it then you don’t need to x40 !
@@Primrose_Kitten
You’ve already multiplied by 10 to get moles in 250cm^3