chemistry help PLEASE (1 Viewer)

[loznadam]

hi ive got a chem assessment can anyone help/?????

perform indepently a first hand investigation to identify each type of solution and explain how the identity of each type of solution was determined

please help i need some marks!!

 

[Ragerunner]

You need to be a bit more specific with the question....

 

[loznadam]

chem

its a prac umm how more specific what do u wanna know?

 

[abdooooo!!!]

im assuming this is for acid and bases... so its just identifying acid and bases... acid turn litmus red base turn them blue.

yea just learn how to work out indicator... pretty sure this is the indicator dot point.

for example, is the solutions slightly acidic, highly alkaline or whatever based on the data you've been given.

 

[loznadam]

yeh thats sick

umm what about things like um variables wopuld u use that in the write up

the write up always stuffs me so bad

 

[abdooooo!!!]

Originally posted by loznadam
yeh thats sick

umm what about things like um variables wopuld u use that in the write up

the write up always stuffs me so bad

i have no idea... i came second last in my first prac assessment... can't write properly. lost all my marks to not setting it out properly and grammatical mistakes.

it really depends on your teacher, how she/he likes it to be set out... should ask if its not already too late.

 

[loznadam]

our teacher is gay he doesnt tell us nothing

i hate write up so bad any one else got any ideas???

 

[xiao1985]

Originally posted by loznadam
hi ive got a chem assessment can anyone help/?????

perform indepently a first hand investigation to identify each type of solution and explain how the identity of each type of solution was determined

please help i need some marks!!

each type of soln??? this quesiton is distroted wut eah type of soln??? wut soln r there??

if it weren't given, i porlly chase it up from the teachers, or, if i am really really despearte, mak up some....

 

[t-i-m-m-y]

my thoughts:

loznadam; please be more specific next time; and if possible relate to a dot point

so here goes
control- distilled water yeah?
solutions of all sorts of thing/solutions LOL
so use some sort of indicator to determine pH of each solution; and based on the pH classify it as basic or acidic

i think with the writeup deal with;
- safety
- improvements; should u repeat stuff?

deal with why some are basic, why some are acidic

perhaps u could also do the concentration thing, with different concs of solutions
-

 

[spice girl]

i think it's a test for cations / anions and about solubility rules

 

[xiao1985]

Originally posted by spice girl
i think it's a test for cations / anions and about solubility rules

lolz, oh yea, dat could verywell be the case!!! ^^

den all u need to do is do the table of ppt, and give a list of order of stuff u need to add to observe for ppt... ^^

 

[ms wendi]

was wondering if anyone can help with a question on neutralisation -

-- analyse information from secondary sources to assess the use of neutralisation reactions as a safety measure or to minimise damage in accidents or chemical spills --

Thanks alot ^^

 

[BlackJack]

Some of the things you should look for is things like carbonate and hydrogen carbonate salts. (e.g. NaHCO3)
These undergo reactions with both acids and bases to take away the H or OH ions, stopping further damage.

On the other hand, using an acid to neutralise a base (+vice versa) isn't a good idea, if you think about using too much or pouring it on the wrong spots.

 

[xiao1985]

lolz, black jack still got the stuff!!!

also, u don't want to use only water, cuz it dilutes the substances, not effectively gettin rid of it...

 

[t-i-m-m-y]

excess base or acid=bad

bicarbonate (amphiprotic) excess=good (well it ain't a problem)