I created this specially for us Chemistry ppl. Anyway, i follow OCR, and any1 has practical exam coming up soon?
Well,this thread is just for discussion of chemistry. Help with chem, etc
I have a go, any1 know this:
A titration was carried out using an 0.10 moldm-3 solution of an unknown acid, HxA to determine the value of ‘x’ in the acid formula. 25 cm3 of 0.15 moldm-3 sodium hydrogen carbonate solution was found to require an average titre of 12.35 cm3 of acid to just neutralise it. What is the value of x?
Well, the answer is this:
1. Amount of sodium hydrogen carbonate = 3.75 x 10-3 mol,
ratio is 1:1, so amount H+ = 3.75 x 10-3 mol
H+ is 0.3 moldm-3, so x=3
So Glorified is He and Exalted above all that they associate with Him, and in Whose Hands is the dominion of all things, and to Him you shall be returned.
(Sura Ya-Seen 36:83)
Molar concentration of the acid was 0.1M, yet it react as if it was 0.3M - the only possible explanation is that it contains three protons per particle.
Molar concentration of the acid was 0.1M, yet it react as if it was 0.3M - the only possible explanation is that it contains three protons per particle.
hope that clears it up for u
did you know you sounded just like a College proffesor ???? (no sarcasm) lol
“Do not argue with your Lord on behalf of your soul, rather argue with your soul on behalf of your Lord.” - Dhul-Nun
"It is the very pursuit of happiness that thwarts happiness." - Victor Frankl
Lol...I'm doing A2 Chemistry, I think its quite hard, probably because I really dont like it. Anyway, I'm so glad I've got my CW out of the way... I just thought I'd express my relief!!!
Molar concentration of the acid was 0.1M, yet it react as if it was 0.3M - the only possible explanation is that it contains three protons per particle.
sorry,but have absolutely no idea what u r talking about ???
So Glorified is He and Exalted above all that they associate with Him, and in Whose Hands is the dominion of all things, and to Him you shall be returned.
(Sura Ya-Seen 36:83)
According to my Nuffield Chem. book, summarised in two sentences:
Homolytic fission is when UV (Ultraviolet) light is used / absorbed by a molecule such as chlorine (Cl-Cl ), to 'split' it into two atoms (Cl and Cl), each with an odd number of electrons on the outer shell.
This is different to the formation of ions following the gain and loss of electron/s by each atom, because in this case, a covalent bond is broken, with each atom in the bond taking one electron, to form two 'free-radicals'.
Please ask if I can clarify further.
Also, when you say 'star theory', are you talking about the life cycle of stars?
If so, is that not covered in the Biology syllabus (not Chemistry) ?
do you see how the covalent bond in the middle (left-hand side) is broken and the molecule is split into two identical free-radicals (right-hand side) ?
It's called 'homolytic fission' because 'homo-' is from the Ancient Greek meaning 'same' and 'fission' because the molecule splits.
yes, I was wrong. According to my book, it's Physics, under the topic - 'Forces', but it's probably Chemistry as well, since it's in sr. ameeratul layl's chemistry-book.
SubhanAllah, that is great Br. Ameen. (I take you are a brother, for some reason). It is so consice and to the point. Just what I need.
Sister Arwa, the star life cycle has not been mentioned in my AS Physics lessons. But, it sure has been mentioned in Chemistry. Do you study Physics?
Hey there! Looks like you're enjoying the discussion, but you're not signed up for an account.
When you create an account, we remember exactly what you've read, so you always come right back where you left off. You also get notifications, here and via email, whenever new posts are made. And you can like posts and share your thoughts. Sign Up
:applaud:
Hide
Looks like you're enjoying the discussion, but you're not signed up for an account.
Posting Permissions
Bookmarks