please help - anyone who has done Chemistry????
06 January 2005, 03:27 PM
#1
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please help - anyone who has done Chemistry????
ok...havent been on here in a LOOOOOOOOOOOOONG time....but i REALLY need some help!!!
i am doing my AS Chemistry coursework and i dont understand the tests at all.
basically i need someone to explain how to do 2 tests to me.
we have an unknown acid, MHSO4 - where M is either sodium or potassium.
we need to prove that it is an acid through 2 chemical tests WITHOUT using indicators.
test 1 will be using acid + limewater which will turn milky with carbon dioxide.
test 2 will be using a acid + metal which will emit Hydrogen.
i dont know how to actually DO these tests at all...ie; what to do, what equipment to use, etc.
i also dont know why the emission of CO2 and H prove that the acid is an acid - i think its something to do with the donating of H+ ions...but i really dont know.
if anyone can help out a thick muppet.....i will be VERY VERY VERY grateful!!!!
i am doing my AS Chemistry coursework and i dont understand the tests at all.
basically i need someone to explain how to do 2 tests to me.
we have an unknown acid, MHSO4 - where M is either sodium or potassium.
we need to prove that it is an acid through 2 chemical tests WITHOUT using indicators.
test 1 will be using acid + limewater which will turn milky with carbon dioxide.
test 2 will be using a acid + metal which will emit Hydrogen.
i dont know how to actually DO these tests at all...ie; what to do, what equipment to use, etc.
i also dont know why the emission of CO2 and H prove that the acid is an acid - i think its something to do with the donating of H+ ions...but i really dont know.
if anyone can help out a thick muppet.....i will be VERY VERY VERY grateful!!!!
06 January 2005, 03:33 PM
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Test tube with a holed bung. Glass tube through the bung in to another container with the lime water. End of glass tube goes in to the lime water so any gas given off bubbles through the limewater. Put the liquid in test tube 1. You seem to be missing a reactant for this, I assume a nice base would be used to generate the C02.
The metal hydrogen one is similar except the collection vessel is upturned with the tube below, the hydrogen rises and displaces the air. Test for H2 with the pop-test.
The metal hydrogen one is similar except the collection vessel is upturned with the tube below, the hydrogen rises and displaces the air. Test for H2 with the pop-test.
06 January 2005, 03:36 PM
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I am not about to explain acid / base chemistry, that's O'level (showing my age) stuff. Do a search on the internet for reactions between CaCO3 and acids or acid / base reactions and also with metals, there is plenty of stuff out there.
06 January 2005, 03:41 PM
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Originally Posted by TelBoy
Sooz, are you building a bomb? 
My expermentation in such fields didn't go much beyond messing with amonium tri-iodide.
Trending Topics
06 January 2005, 03:41 PM
#8
\m/ ^_^ \m/
Suze/Sooz/Suz, owz it going?
.
.
Last edited by flat4; 06 January 2005 at 03:42 PM. Reason: i know nothing about chemicals and stuff, sorry
06 January 2005, 03:43 PM
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LOL......no hes still around Buzzer!!!
thanks olly!
hey Tel....if only!!! at least then i could blow up this hell hole of an office and get on with ruling the world
thanks olly!
hey Tel....if only!!! at least then i could blow up this hell hole of an office and get on with ruling the world
06 January 2005, 03:57 PM
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Well, adding an acid, eg Sulphuric acid, to a carbonate, such as calcium carbonate, causes the formation of a salt. In this case, calcium sulphate. There are 2 Hydrogen ions left over, plus a calcium and three oxygen. The two hydrogens link up with an oxygen to make water, leaving a carbon and two oxygens.-CO2. This bubbles through the limewater (which is a saturated solution of Calcium hydroxide) and results in the formation of the insoluble salt Calcium carbonate. Which is why it goes cloudy.
I cannot be arsed to explain the acid one, sexy though you purport to be.
I cannot be arsed to explain the acid one, sexy though you purport to be.
06 January 2005, 04:00 PM
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What Olly said! 
Plus you will need to dissolve your MHSO4 in water first assuming you are supplied it in powder or granular form because when you add NaHSO4 or KHSO4 to water it makes dilute sulphuric acid.
Plus you will need to dissolve your MHSO4 in water first assuming you are supplied it in powder or granular form because when you add NaHSO4 or KHSO4 to water it makes dilute sulphuric acid.
06 January 2005, 04:00 PM
#16
I recall Acid + Base = Salt + Water
HCl + NaOH = NaCl + H2O
Easier to show if you use HCl as your acid:
2HCl + CaCO3 = CO2 + H2O + CaCl2
2HCl + Fe2 = 2FeCl + H2
p.s. How was the boarding? A little birdie tells me someone injured their shoulder?
p.p.s. Don't listen to me - I only got a C at Chemistry
HCl + NaOH = NaCl + H2O
Easier to show if you use HCl as your acid:
2HCl + CaCO3 = CO2 + H2O + CaCl2
2HCl + Fe2 = 2FeCl + H2
p.s. How was the boarding? A little birdie tells me someone injured their shoulder?
p.p.s. Don't listen to me - I only got a C at Chemistry
06 January 2005, 04:03 PM
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Originally Posted by Bubba po
Well, adding an acid, eg Sulphuric acid, to a carbonate, such as calcium carbonate, causes the formation of a salt. In this case, calcium sulphate. There are 2 Hydrogen ions left over, plus a calcium and three oxygen. The two hydrogens link up with an oxygen to make water, leaving a carbon and two oxygens.-CO2. This bubbles through the limewater (which is a saturated solution of Calcium hydroxide) and results in the formation of the insoluble salt Calcium carbonate. Which is why it goes cloudy.
I cannot be arsed to explain the acid one, sexy though you purport to be.
I cannot be arsed to explain the acid one, sexy though you purport to be.
06 January 2005, 04:10 PM
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THANKS GUYS!!!!
that helps me out a fair bit!!!!
hey Rich,.....boarding was great thanks...and yes...a certain someone did hurt himself
im guessing it was POC who told you???
oooh and tell Anna sorry for not replying to her email about our addy....we were already in Canada...so i wasnt ignoring her!!
that helps me out a fair bit!!!!
hey Rich,.....boarding was great thanks...and yes...a certain someone did hurt himself
im guessing it was POC who told you???
oooh and tell Anna sorry for not replying to her email about our addy....we were already in Canada...so i wasnt ignoring her!!
Last edited by sexy wrx69; 06 January 2005 at 04:17 PM.
06 January 2005, 04:27 PM
#21
Originally Posted by sexy wrx69
THANKS GUYS!!!!
that helps me out a fair bit!!!!
hey Rich,.....boarding was great thanks...and yes...a certain someone did hurt himself
im guessing it was POC who told you???
oooh and tell Anna sorry for not replying to her email about our addy....we were already in Canada...so i wasnt ignoring her!!
that helps me out a fair bit!!!!
hey Rich,.....boarding was great thanks...and yes...a certain someone did hurt himself
im guessing it was POC who told you???
oooh and tell Anna sorry for not replying to her email about our addy....we were already in Canada...so i wasnt ignoring her!!
Not seen lardy boy since before Christmas, too many mince pies I'll bet! Anyway, we all must go out for drinks, POC has suggested sometime in February if you guys are up for it?
06 January 2005, 04:52 PM
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Originally Posted by john_s
A level chemistry's great... we spent 2 years trying to blow the lab up
John.
John.
06 January 2005, 05:56 PM
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Originally Posted by john_s
A level chemistry's great... we spent 2 years trying to blow the lab up
John.
John.
it took you 2 years to learn that all you had to do was get down the garden centre and stock up on yer AMMONIUM NITRATE
and blow that biatch to bits?! good god
-king of the boom
06 January 2005, 06:14 PM
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Originally Posted by chaos.
you couldnt blow a baloon up with all the weak shyte you get to use in a typical a level chem lab
06 January 2005, 06:18 PM
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Originally Posted by ajm
You are joking aren't you..... what about 20 gas taps and some white phosphorus left to dry in a dish as the fuse?!
I've put an order in for 30 kilos..
love it
06 January 2005, 07:20 PM
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I haven't done Chemistry, I'm only early (ok mid!) -20's and I don't feel the need to be honest. I'm not quite that desperate yet!
Oh, sorry, I thought you meant the speed dating event for sad people who can't get dates without meeting up with other desperate losers!
(Ok I admit it, I have been once! (Ok twice, but that time was just to keep someone company if they didn't score))
Oh, sorry, I thought you meant the speed dating event for sad people who can't get dates without meeting up with other desperate losers!
(Ok I admit it, I have been once! (Ok twice, but that time was just to keep someone company if they didn't score))
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