help on syllabus point (1 Viewer)

[**freakstar87**]

anyone here know how to do this dot point? i can't find alot of info based on this area

- Identify data, gather and process information from secondary spurces to identify examples of naturally occuring acids and bases and their chemical composition

thanks if you have any advice on doing this question

 

[tennille]

Naturally occurring acids include HCL, acetic acid (CH3COOH), citric acid, vitamin C (ascorbic acid). I'm not sure about bases. But put those into Google and you should get some info.

 

[pseudobubble]

http://science.uniserve.edu.au/school/curric/stage6/chem/acidbase.xls

I found it just a few weeks ago when I was doing that dot point ^^ It is from UniServe (it is a Sydney Unisversity thing), and here is the link to it if:

http://science.uniserve.edu.au/school/curric/stage6/chem/index.html

You should bookmark this website =) It has a lot of valuable information for both the HSC and Preliminary courses.

I hope this helps =)

 

[Dreamerish*~]

the acids you need to know are (i think):

acetic acid - CH₃COOH: systematic name is ethanoic acid, found in small amounts (approx. 4 - 5%) in vinegar. weak.

hydrochloric acid - HCL: also known as muric acid. found in the stomach as stomach acid. strong.

carbonic acid - H₂CO₃: found in soft drinks and acid rain. weak.

citric acid - C₆H₈O₇: systematic name is 1,2,3-tricarboxylic-2-hydroxypropane. found in citric fruits such as lemon and lime. weak.

sorry i don't have time to type bases because i'm loaded with math hw '-_-

 

[pseudobubble]

Maybe the bases in that excel file are a bit complicated, with the exception of ammonia.

What do you all think about carbonates?

 

[Dreamerish*~]

Maybe the bases in that excel file are a bit complicated, with the exception of ammonia.

What do you all think about carbonates?

what about carbonates?

 

[pseudobubble]

They are bases =p are they not?

 

[Dreamerish*~]

They are bases =p are they not?

lol yes they certainly are..

 

[pseudobubble]

We have more to add to our lists then ^^

 

[Dreamerish*~]

We have more to add to our lists then ^^

which bases are naturally occuring?

 

[tennille]

calcium carbonate (aka lime)- CaCO3- mineral

 

[pseudobubble]

Ammonia - volcanic gas, decaying organic matters
Carbonates - I am not sure since I just came up with it =p but I know calcium carbonate is limestone ^^ Sodium carbonate occurs as natural deposits too!

 

[Templar]

Also any soluble metallic oxides...

There aren't many naturally occuring bases, and they're all pretty weak compared with the acids.

 

[LSP]

These are some example i got for this dot point:
naturally occuring base-
- DeoxyInosine - present in a DNA template
- Alkaloids - complex multi-ring structures, nitrogen generally makes the compound basic and the compound exists in the plant as a salt

For the acid, enough info from everyone else