Chemistry Practical 26th Oct - How was it?

[Evil_Maknae]

I used the total volume (70 cm3) to calculate the concentration as it said reaction mixture in the question. Do you think that would be right?

 

[babycry]

I used the total volume (70 cm3) to calculate the concentration as it said reaction mixture in the question. Do you think that would be right?

yeah thats what i did.. i most probably think it is correct.. and btw guys the line dint have to pass thru the origin. i asked the technicians and they told me the mixture had impurities as instructed in confidential instructions

 

[Kumkum]

yeah thats what i did.. i most probably think it is correct.. and btw guys the line dint have to pass thru the origin. i asked the technicians and they told me the mixture had impurities as instructed in confidential instructions

i forced my graph to pass through origin and i only had one point on my graph and all the other points were close to my graph but not on my graph....

 

[babycry]

i forced my graph to pass through origin and i only had one point on my graph and all the other points were close to my graph but not on my graph....

anyways all is not lost.. it may be wrong but i doubt it cos the supervisor told me..

 

[Evil_Maknae]

anyways all is not lost.. it may be wrong but i doubt it cos the supervisor told me..

Really??? All students in my centre had their graph passing through the origin and with points near or on the line.

 

[babycry]

Really??? All students in my centre had their graph passing through the origin and with points near or on the line.

well i dint exactly ask them.. my teacher asked them and told me.., but whatever we say we cant change anything so lets forget it

 

[Evil_Maknae]

well i dint exactly ask them.. my teacher asked them and told me.., but whatever we say we cant change anything so lets forget it

You're right... It's in the past

 

[Nishii]

hey i used wrong units in my graph, will i be penalised?

 

[TCHS]

My line didn't pass through the origin? :/

 

[Nishii]

My line didn't pass through the origin? :/

maybe you'll lose only one mark!

 

[TCHS]

Hope so! How much was the graph for anyway??

 

[Nishii]

5!

 

[TCHS]

5!

Phew! :/

 

[Nishii]

 

[Muniba Suhail]

1. Less surface area, so quick time.
2. 0.03 concentration
3. Directly proportional.

Would it be true to say that it is necessary for the graph to pass through the origin if we are to say it is directly proportional. It was clear that the increase in volume is proportional to the increase in "rate".

 

[Muniba Suhail]

i multiplied the errors by 2 then divided by the respective volume and multiplied by 100!

Why did you multiply the errors by 2?

 

[TCHS]

Okay so I'm confused here. How can the line pass through the origin if our volume of FA1 AND our corresponding rate value was greater than ZERO? :/

 

[Muniba Suhail]

for concentration i first got 0.03. then i realised that u had to use the total volume which included volume of acid used, so then i got 0.021 moldm3.

I got 0.03 by using the total volume.

 

[TCHS]

I used the total volume (70 cm3) to calculate the concentration as it said reaction mixture in the question. Do you think that would be right?

Yes that's right but wasn't the total volume 50 cm3 not 70?

 

[Nishii]

Why did you multiply the errors by 2?

the uncertainty question is similar to the one in nov 2007! when my teacher corrected it, he multiplied by 2.. i forgot the explanation he gave :/