Predictions for Chemistry 2014 HSC? (5 Viewers)

[strawberrye]

ooo

What do you think the question would focus on?

The answer I will leave to my chemistry paper But besides that, I think something to do with nuclear and radioistopes seems really probable on the balance of probabilities

 

[QZP]

New Q (industrial students): What TWO equations for the reactions that occur in the Solvay Tower (past paper Q and textbooks have contradicting answers so idk anymore :/)

 

[faisalabdul16]

New Q (industrial students): What TWO equations for the reactions that occur in the Solvay Tower (past paper Q and textbooks have contradicting answers so idk anymore :/)

<a href="http://www.codecogs.com/eqnedit.php?latex=NaCl&space;&plus;&space;NH_3&space;&plus;&space;H_2O&space;&plus;&space;CO_2&space;\rightarrow&space;NH_4Cl&space;&plus;&space;NaHCO_3&space;\\&space;\\&space;NaHCO_3(aq)\rightarrow&space;NaHCO_3(s)" target="_blank"><img src="http://latex.codecogs.com/gif.latex?NaCl&space;&plus;&space;NH_3&space;&plus;&space;H_2O&space;&plus;&space;CO_2&space;\rightarrow&space;NH_4Cl&space;&plus;&space;NaHCO_3&space;\\&space;\\&space;NaHCO_3(aq)\rightarrow&space;NaHCO_3(s)" title="NaCl + NH_3 + H_2O + CO_2 \rightarrow NH_4Cl + NaHCO_3 \\ \\ NaHCO_3(aq)\rightarrow NaHCO_3(s)" /></a>

 

[QZP]

Nope. The first equation you listed is the overall equation of the 2-steps

 

[zhertec]

Anyone ever tried using succinct dot points to answer 2-5 mark questions instead of writing paragraphs? And is it recommended to use dot points as well?

 

[emilios]

Nope. The first equation you listed is the overall equation of the 2-steps

Ok I've seen this broken down somewhere. But there's more than two equations isn't there?

CO2 + H2O --> H2CO3

H2CO3 + NH3 --> HCO3- + NH4+

Na+ + HCO3- --> NaHCO3 (aq)

 

[faisalabdul16]

Okay I believe for most of us, our next exam is chemistry! Let's revive this thread!

Explain the importance of Haber's discovery.

 

[faisalabdul16]

Bump

 

[Kurosaki]

Okay I believe for most of us, our next exam is chemistry! Let's revive this thread!

explain the importance Haber's discovery

Looks a bit incomplete?

 

[Queenroot]

Looks like no one cares lol

 

[faisalabdul16]

Looks a bit incomplete?

hahaha oops

Looks like no one cares lol

Everyone has business today or eco tomorrow

 

[enigma_1]

hahaha oops

Everyone has business today or eco tomorrow

Yusssss omg business is overrr

 

[faisalabdul16]

Yusssss omg business is overrr

How was it?

 

[enigma_1]

How was it?

It was actually alright (thank gosh)
Now for eco!

 

[faisalabdul16]

It was actually alright (thank gosh)
Now for eco!

hahahaha Have fun doing another exam tomorrow

 

[enigma_1]

hahahaha Have fun doing another exam tomorrow

Haha thanks, will be back on this thread after tomorrow's exam )

 

[timeflies]

Okay I believe for most of us, our next exam is chemistry! Let's revive this thread!

Explain the importance of Haber's discovery.

Alright, lets go

- Before WWI, one of the main source of ammonia for use as fertilisers was from saltpetre from Chile.
- During WWI, these supplies were cut to Germany and thus, they required a new method of obtaining ammonia for essential food production.
- The Haber Process provided a way for ammonia to be formed from gaseous nitrogen and hydrogen and was essential at that time for Germany, as it provided fertiliser and thus food for their population, preventing mass starvation.
- Ammonia could also be used to produce nitric acid which was in turn used to make explosives and so the discovery aided Germany's war efforts.
- Therefore, Haber's discovery was essential for Germany as it provide food for its people and weapons for the war, essentially prolonging WWI.
- However, after the war, this new method of obtaining ammonia was adopted worldwide and today the sheer importance of the discovery is evident as the Haber Process is the main source of ammonia, which is used for fertilisers in order to feed our continually growing population. This high demand for ammonia and fertilisers would not have been able to be provided by natural sources such as saltpetre and guano and thus the importance of the Haber's discovery.

 

[timeflies]

New Question: Describe and explain the exothermic nature of sulfuric acid ionisation (Industrial)

 

[GOsie]

Reviving my shipwrecks question as it was left unanswered.
i) Name of method for removing salt from an artifact recovered from a wreck (1 mark)
ii) Explain, with reference to two examples, chemical procedures used to clean and preserve artifacts from wrecks (5 marks)

Bumping again because still no answer. Does nobody do shipwrecks?

 

[enigma_1]

Bumping again because still no answer. Does nobody do shipwrecks?

I do but eco tomorrow lol

Will get back to it after eco