General Thoughts: Science (3 Viewers)

[Queenroot]

far out looking at this forum, i have already lost a solid 5 marks in the MC, although the one word response/long response questions should compensate as im expecting near 45/50 for them combined.

Agree !

 

[Queenroot]

A friend linked me to this ....

http://answers.yahoo.com/question/index?qid=20081118002025AAKz0Pp

OH shtttt
there goes another mark.

 

[RealiseNothing]

It was definately precipitation.

 

[RivalryofTroll]

OH shtttt
there goes another mark.

It can't be that technical!

 

[RealiseNothing]

It can't be that technical!

It's not, you can't even fit that reaction into the boxes anyway. It's definately precipitation.

 

[Renegader]

The questions asks what is formed, it's a precipitate. :/

 

[RivalryofTroll]

If there's any Ruse kids lurking out there, how did you guys find both exams? (Too easy, easy or sleep-worthy?)

 

[sam57]

It can't be that technical!

you never need to out a balanced chemical equation in the school certificate, only in the HSC, so the correct answer is KOH

 

[such_such]

A friend linked me to this ....

http://answers.yahoo.com/question/index?qid=20081118002025AAKz0Pp

That's in the year 11 syllabus and has to do with precipitation since I just learned it at tutor :') Double displacement is just the overall term used to describe reactions such as precipitation, acid + base, acid + carbonate and yeah...

 

[RivalryofTroll]

you never need to out a balanced chemical equation in the school certificate, only in the HSC, so the correct answer is KOH

I was talking about the precipitation question not about KOH (potassium hydroxide) I think

 

[sam57]

I was talking about the precipitation question not about KOH (potassium hydroxide) I think

sorry

 

[tobbinator]

No one's potassium Hydroxide answer can be as bad as mine...

K(OH)3

 

[onedirection]

what did you guys get for the um... powder mixed with liquid and turns into a milky(?) substance and has the bubbles in it?

 

[tobbinator]

what did you guys get for the um... powder mixed with liquid and turns into a milky(?) substance and has the bubbles in it?

I believe I did carbonate. Then the gas was Carbon Dioxide.

Probably wrong.

 

[Lina3]

what did you guys get for the um... powder mixed with liquid and turns into a milky(?) substance and has the bubbles in it?

I had CO2 as the gas that was in it and then the acid+carbonate reaction as the 2nd answer for that...but not sure

 

[RealiseNothing]

what did you guys get for the um... powder mixed with liquid and turns into a milky(?) substance and has the bubbles in it?

I did hydrogen since the liquid was clear so it can't be CO2. Then was an acid+metal = salt + hydrogen reaction.

 

[tobbinator]

I did hydrogen since the liquid was clear so it can't be CO2. Then was an acid+metal = salt + hydrogen reaction.

Didn't it say it was bubbled through limewater which turned milky? That would mean it'd be CO2

 

[falsenthusiasm]

limewater and CO2. Got lucky with that. =D Although I knew it was either hydrogen or CO2.

 

[RealiseNothing]

Didn't it say it was bubbled through limewater which turned milky? That would mean it'd be CO2

Really? I didn't read that anywhere:/ FML

 

[zannasheayarrow]

It was definitely CO2, I got the reactants as acid and carbonate but which one was the solution?