2010 HSC Chemistry Revising Marathon (2 Viewers)

[NewiJapper]

is that prelim, i dont remember learning that

Yea i dont either :/

Here's one;
With aid of a chemical equation, outline a procedure where you can measure the chloride concentration within a given sample of water. (3 marks)

 

[hello-there]

Its from the industrial chem dotpoint: "describe uses of sodium carbonate"
Answer to above:
1. gently heat the solution as chlorine has a low boiling point of -34.04 degrees
2. Ensure that a lid with a pump attached to it is secured
3. Pump the chlorine gas into a condenser to turn it to liquid
4. weigh and use n=V/mV and n=m/mm
P.S this is a question that is a foreign question. Where is it from?

So is someone gonna answer my question?
Anyways heres another one on top of my original question
Q. What does the cation in soap do to its properties (as it is not involved in the cleaning action, FROM IND. CHEM)

 

[horseluver29]

Can we maybe have some questions that AREN'T from the electives, cos people are doing different electives.....

 

[random-1006]

Define the term " buffer"

Describe the importance of buffers with reference to a specific system . Illustrate your answer with equations