rounding off (1 Viewer)

[stef.]

when rounding off..specifically for pH values and concentration of H3O+,

do we stick with what conquering chem says..

ie.. decimal places of pH will equate to the number of sig.figs in the conc. ??

is this what bos wants/

 

[serge]

i dont think chem ever asks for 2 d.p or whatever
so aslong as you mention what you've done
you wont lose any marks

 

[mitochondria]

The convention is to report the answer with significant figures that is the same as the number that carries the least significant figures.

e.g. 0.125 x 0.40 = 0.05 ------> (0.40 has the least significant figures, which is 2 in this case)

 

[Necros87]

yeah, if they give you a q with all values in 2dp, use 2 dp, but dont round off till the final answer, or you will be way off

 

[Dreamerish*~]

The convention is to report the answer with significant figures that is the same as the number that carries the least significant figures.

e.g. 0.125 x 0.40 = 0.05 ------> (0.40 has the least significant figures, which is 2 in this case)

I never knew that. I just went with what CC said.

Thanks!

 

[mitochondria]

lol what does CC say?

It's not too late to realise that CC is not good with numbers