Chemistry: Post your doubts here!

[Holmes]

I have no idea how to approach this question . I dont even know what is happening . Anyone, please care to explain this in detail.....

I also posted this question in this thread and anastasia grey113 replied with some explanation here is what she said:
.#17196

 

[Holmes]

I also posted this question in this thread and anastasia grey113 replied with some explanation here is what she said:
.#17196

Hope it helps !

 

[sushil bista]

Can anyone help me to find maximum percentage error?

 

[anastasia grey113]

Can anyone help me to find maximum percentage error?

Find uncertainty by dividing the smallest division on apparatus by 2.
Then use the following equation
%age error = uncertainty/reading x 100%

 

[bassamkhan35]

Hey everyone out there. I was wondering if someone has the same paper variant as me in other countries so that due to time difference we can help with the questions coming. My paper variants are listed below.
Physics 22, physics 12 physics 33
Chemistry 22, Chemistry 12 and Chemistry 33
Mathematics 12 and Mathematics 62
My time zone Pakistan Standard time GMT+5

 

[Mstudent]

Guys, How do I work out the precision of a thermometer?

 

[anastasia grey113]

Guys, How do I work out the precision of a thermometer?
View attachment 63384

they are asking for the smallest division on the thermometer scale

 

[Mstudent]

they are asking for the smallest division on the thermometer scale

But doesn't a thermometer have a precision of 1 degrees usually?

 

[anastasia grey113]

But doesn't a thermometer have a precision of 1 degrees usually?

well ive worked with those having o.1 degrees
in p3 if u could remember u r post to record temp readings up to 1 d.p.

 

[Holmes]

Is it in our syllabus? j\15\41

 

[anastasia grey113]

This is part of the content that's been removed from the syllabus.

 

[Mstudent]

Could anyone give me any tips on how to answer questions about anomalous points and explaining why they are anomalous? PLZ help me out

I really can't give any reasons to why they are anomalous

 

[Mstudent]

ANd can anyone explain what we draw when they want construction lines in finding grad from graph??

 

[anastasia grey113]

ANd can anyone explain what we draw when they want construction lines in finding grad from graph??

well basically a triangle joining the two points v take to measure gradient with the best fit line as the hypotenuse.

Could anyone give me any tips on how to answer questions about anomalous points and explaining why they are anomalous? PLZ help me out

I really can't give any reasons to why they are anomalous

well that will come by practice
there is no specific formula or concept to determine them cuz u know any kind of question can come up
u just have to think critically
but let me tell u...where time is involved whether on the x axis or as a constant, it is usually considered to be the cause of anomaly i.e. the reading might have been taken too early or too late.
but then again, there r exceptions :/

 

[Holmes]

This is part of the content that's been removed from the syllabus.
View attachment 63386

I'll take it as NO

 

[anastasia grey113]

I'll take it as NO

smart enuf

 

[Mstudent]

I'll take it as NO

OMG really!

 

[Holmes]

OMG really!

yeah.

 

[A*****]

Why can't this be dehydration??

 

[anastasia grey113]

Why can't this be dehydration??

well in dehydration, the water is not chemically bonded to a compound. Dehydration is something like this:
CuSO4.5H2O -----> CuSO4 + 5H2O