chemistry help (1 Viewer)

[royaaran]

can some1 please help me answer this dot point from the syllabus, The acidic environment, point 4.


- Choose equipment and perform a first hand investigation to identify the pH of a range of salt solutions.

we did the experiment in school but i dont get what im supposed to know?

thanks

 

[pLuvia]

The aim of the experiment was to show us that salts could be either acidic or basic depending on if the reaction was with an acid and/or a base. i.e. weak base + strong acid --> Acidic salt, strong base + weak acid --> Basic salt etc. And this just helps us when measuring the pH of the salt that we know the pH will be >7 or <7.
Be able to write out the procedure of the experiment for exams

 

[Riviet]

Also, a strong acid reacting with a strong base results in a neutral salt formed with a pH of 7. You can measure the pH different ways such as using a pH probe with a data logger or indicators.

 

[royaaran]

cool thanx for that....but umm..about writing the procedure...what if i, for some reason forgot it???? :S

 

[pLuvia]

Well you could borrow the procedure off someone or just go to this site created by a fellow BoS member

http://www.geocities.com/jamesyscience_chemistry/hsc/tae/exp.html

Hope that helped

 

[Riviet]

You can think out the procedure if you get a mental blank in the exam, go through the process of the equipment you would need to perform the experiment and the various steps. If you think/know you're going to forget something, then make the effort to remember those particular points! Hope that helps.

 

[royaaran]

oh yeah it helped heaps, thanks so much for that site