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Estimate the pH of a 0.1 M ethanoic acid solution using the equation below, where [CH3COOH]o is the nominal (initial) ethanoic acid conecntration.

Ka=[H3O+][CH3COO-]/[CH3COOH]o −[H3O2+] ≈ [H3O+]2/ [CH3COOH]o

pH = -log10[H3O+]

Hey guys, I'm supposed to answer this question, the problem is I have practically no idea what it means or how to do it, if somebody could show me the working that would be absolutely amazing! I'm really stuck and it needs to be done ASAP.

I did my best to lay the equation out in a way that makes sense so I hope it does, any help would be appreciated thanks in advance :)

My brother just came home with an injured bird, It's quite young but I'm not sure what kind of bird it is, Can't get it to a vet right now but I'm under instructions to find out what to do with the wound and what to feed it. It has bee mauled by a cat under one of its wings its lost some feathers and theres bleeding and apparently a bit of bone showing but I didn't see it.

Thanks in advance.

Well basically I've been reading around and I have found people who have said that diesel does things for their engine that only Jesus could equal, cleaner better protection due to higher viscosity etc... and i have also come across people who have said that diesel oil will tear your engine apart in a way that can only be seen in mortal combat. Just wondering if someone who actually knows their stuff could clear this up for me.

Thanks in advance.

P.S I am not confusing the oil with the fuel before anyone asks.

Basicaally, whenever i try to use my indicators they wont come on, there is no response from the indicators themselves or on the indicator light on the dash, although there is a clicking/fizzling from the relay, im not too sure why it is but the indicators suddenly start working when the bike gets to really high revs, i'm thinking the battery needs replacing but i just wanted some advice from someone a bit wiser than me, thanks in advance

Basically i have been riding this thing since august and i was stupid enough never to check the oil, now a couple of days ago the bike started jumping a bit on the pull-away, i had no idea why, then yesterday there was a slight rattle which made me think that i should do something about the oil but i couldn't get my hands on any 4 stroke oil, so i kept riding like a numb-nuts and the little rattling turned into a big rhythmic clatter that would keep in time with the engine revs, then i really thought i had finished the poor thing off when i couldn't get up a hill that normally my bike has no problem with, i could barely hit 40mph with full throttle! i then left the bike at my mates house as he knows more about bikes than i do and he is going to look it over for me but he wont be able to get back to me for a couple of days so really all i want to know is if its dead and if not roughly how much would it be to repair? Its a 2001 Honda CG125. Thanks in advance.

Basically my ipod keeps coming up with the infamous big red X and the reference to apples website, there is also a kind of sizzling sound coming out of the back it sounds like it might be the hard drive but i dont really know much about these things. i did think it was water damage but drying it out hasnt done anything and the water damage indicator is still white. does anyone have a clue as to whats going on? (by the way the apple warranty has run out)

I have been given a question to answer but I have no idea where to begin, I would appreciate it if someone could explain how to do it, what equations to use in what order etc... without actually putting the numbers into the equations. Thanks in advance.

A plane of mass 4000 kg is travelling in a level circle. In order to do this it is banked at 5 degrees to the horizontal, if the plane has a velocity of 100 ms^-1 what is the radius if the circle?

Ok so i recently got a Honda CG 125, its been sat inside for about a month now as i haven't been able to use it because i haven't done my CBT yet. I went to move it today and for some reason the rear wheel has locked up, it moves a little bit either way but then it suddenly stops, i have no idea what has happened so any help/ solutions would be very much appreciated, thanks in advance

Hi, I am looking to buy my first motorcycle and I have no idea what the seat height should be, I am 6 foot 3 inches tall, what would be an appropriate seat height????? thanks in advance.

Basically, I have a car to sell, my dad is the keeper but he has said if I find a buyer he will sign the paperwork and I can keep a money but I don't think he has paid the tax on it and is being fined but I have a buyer coming around tomorrow and I want to know, if I sell the car to them do the fines transfer to them as well or do they stay with my dad? I really need to know as I don't want to screw these people over, thanks on advance.

Ok, at the end of december 2009 i took out a contract with orange, £36 for 900 mins, unlimited texts and 500MB 3G usage and insurance. My problem is, I'm paying the contract but the service is crap, i cant connect to the internet and 90% of the time it wont let me send texts so I'm paying this money and I'm not getting most of what I'm paying for so can I cancel the contract without any fees because I'm not getting the service or what? thanks on advance

Basically I would like to go into medical research when i leave university but I have been offered the chance to train as a cardiac physiologist and get a degree in clinical physiology, so my question is, can I get into medical research with a degree in clinical physiology or would I have to go for something like biomedical science or pharmacology?

Basically there is this girl I really like, i mean i could go on all day listing the things I like about her, and I kinda get the impression she might like me but i cant be sure, the problem is she has a boyfriend and she is happy with him so i don't want to jeopardise that, any suggestions on what i should do, should i act or leave it, i'm quite confused to be honest :S by the way i do know her, i'm not one of those creepy stalker types that stare from across the room.

Hi there, after next academic year I will hopefully be off to university studying biomedical science and i have been advised to do some background reading in relation to subject so does anyone have any suggestions? Thanks in advance.