biology practical

[Snowysangel]

I wrote that add 3cm^3 or slight more iodine as it had been interpreted by the graph. Is it fine?

Haha yeah. On a different note are you guys giving p34 for chem and physics as well?

 

[Rohan O]

It was asking about the volume of iodine if conc. of ascorbic acid is 0.0001, something of this sort, the very last part of question no. 1

I got 3.0 by extending the straight line on the graph

 

[Rohan O]

I wrote that add 3cm^3 or slight more iodine as it had been interpreted by the graph. Is it fine?

Definitely! That's how the question was supposed to be done

 

[Rohan O]

Haha yeah. On a different note are you guys giving p34 for chem and physics as well?

Yeah . And then mcqs:/

 

[happyperson]

Haha yeah. On a different note are you guys giving p34 for chem and physics as well?

Yeah! p 34 of chemistry and physics.

 

[aneeq247]

What values of iodine vol did you guys get in the first question?

 

[happyperson]

What values of iodine vol did you guys get in the first question?

I got 1.3 then 1.5 and 1.8, somewhere along these line, first was 1.2 or 1.3 i guess. What about you?

 

[Snowysangel]

I got 1.3 then 1.5 and 1.8, somewhere along these line, first was 1.2 or 1.3 i guess. What about you?

What?! All my readings were below 0.2 cm3

 

[happyperson]

What?! All my readings were below 0.2 cm3

really!! I don't know i got these. But i think, what matters more is trend, not the actual readings.

 

[aneeq247]

Well the volume of iodine that was used in each experiment in my case was 0.9, 0.8, 0.65 and 0.2 . I think I messed up on this part of the question.

 

[Snowysangel]

really!! I don't know i got these. But i think, what matters more is trend, not the actual readings.

There's gonna be a mark for that tho. I got these because I stopped adding iodine when the color stated for more than 10 seconds but disappeared before 15 seconds. Everyone else waited for a permanent color change...u probably did that too. They should have been more clear with the instructions...it's so typical of them :/ anyway just a mark

 

[happyperson]

There's gonna be a mark for that tho. I got these because I stopped adding iodine when the color stated for more than 10 seconds but disappeared before 15 seconds. Everyone else waited for a permanent color change...u probably did that too. They should have been more clear with the instructions...it's so typical of them :/ anyway just a mark

No, i didn't do so, i took the reading where the blue black colour appeared then i checked whether it stayed for 10sec and when it did i didn't add any further.

 

[happyperson]

Well the volume of iodine that was used in each experiment in my case was 0.9, 0.8, 0.65 and 0.2 . I think I messed up on this part of the question.

This part was tough, question 1 overall was tough to handle :/

 

[Snowysangel]

No, i didn't do so, i took the reading where the blue black colour appeared then i checked whether it stayed for 10sec and when it did i didn't add any further.

Oh I added just a few drops until it remained for more than 10 seconds

 

[aneeq247]

Vote for GT here : https://www.xtremepapers.com/commun...ade-threshold-prediction-no-discussion.34295/

 

[samantha liyanage]

i got it wrong
hey in the table i didnt ook first sample at 0 minute and so how much marks ill lose any idea?

nope sorry :/
i guess 1 or 2 marks :/