Chem p6 v2

[Adahshan]

Copper sulphate reacting with zinc.

I wrote that solid decreases in size and fizzing. Is it correct?

They saying fizzing is wrong.

Look at this:

If this is right from answers.com, then fizzing is correct.

 

[Gunner1995]

i wrote fizzing, which i think is wrong... i wrote solution changes colour. which is right

 

[Adahshan]

Changes color is right but same i got only 1/2...

I'm pissed about fizzing.

 

[Keeemoman]

Copper sulphate reacting with zinc.

I wrote that solid decreases in size and fizzing. Is it correct?

They saying fizzing is wrong.

Both are wrong for 100%

 

[Adahshan]

Solid decreases in size is 100% corrected, Just checked. but fizzing is wrong. Please don't post if your not 100% sure..

 

[Aahmsil]

My answer

Copper sulphate reacting with zinc.

I wrote that solid decreases in size and fizzing. Is it correct?

They saying fizzing is wrong.

1) Solution turns from blue to colourless
2) A brown metal/solid (copper) is formed

 

[Aahmsil]

Say whuut ?

Solid decreases in size is 100% corrected, Just checked. but fizzing is wrong. Please don't post if your not 100% sure..

Where did you check from ?

 

[Ahmooosh]

haha damn , i wrote that copper formes and settles , but then i crossed it out for fizzing.

 

[markiola]

I wrote that bubbles are formed and the zinc is gradually disappearing/dissolving

 

[Adahshan]

Mark, thats 1/2 marks until someone confirms fizzing is correct.

Look :

 

[Keeemoman]

Hey Aahmsil no need to write the colour change of the solution
You just need to know that there is in the colour of the solution
But for brown solid you need to mention as it is given in the syllabus

The only correct answer is Aahmsil answer and thats for sure

 

[Adahshan]

Read the first page -.- picture.

 

[Aahmsil]

Allo ???

Mark, thats 1/2 marks until someone confirms fizzing is correct.

Look :

So I get 2/2 ???

 

[Adahshan]

Yes from what it shows in the picture.

 

[Aahmsil]

Yaaay !!!

Yes from what it shows in the picture.

Great !!! Thanks
Hope you do well :good:

 

[1bilalm]

guyz how did every one do for the first question that asked for which apparatus should be used
i do evaporating disk
am i right

 

[Aahmsil]

Weeeeee

guyz how did every one do for the first question that asked for which apparatus should be used
i do evaporating disk
am i right

I guess.
I wrote evaporating basin/china dish.

 

[1bilalm]

and how abut last experiment question
the one says alcohal thing

 

[Outofideaz]

dat was easy ... use the stand to hold the beaker in position above the fuel ... use same volume of water and mass of fuel... ignite the fuel ..... measure the time for the water to reach a specified temperature... repeat experiment with bioethanol (watever it was) the fuel which required less time produces more energy


Qs. 1 wat was it .. a measuring cylinder or burette???
damn for the CuSO4 qs. i wrote metal (copper) is deposited .... is it correct?

 

[1bilalm]

dat was easy ... use the stand to hold the beaker in position above the fuel ... use same volume of water and mass of fuel... ignite the fuel ..... measure the time for the water to reach a specified temperature... repeat experiment with bioethanol (watever it was) the fuel which required less time produces more energy


Qs. 1 wat was it .. a measuring cylinder or burette???
damn for the CuSO4 qs. i wrote metal (copper) is deposited .... is it correct?

really man dont ask messed dat up
and for that question i write Graphite rods i think