rinsing volumetric glasses

[physics]

A pipette contains the dilute conrete cleaner solution.
The burette contains the standard sodium carbonate.
And the conical flask contains the conrete cleaner.

What would u rinse the tools  with?
i said the tools are just rinsed with what they are filled with...

but the options invovle rinsing with distilled water, the dilute conrete solution or the standard sodium solution.

THANKS

and i'm just confused of where the standard soluton goes...it goes in the volumetric flask right?
and the substance with unknown concentration goes in the burette?

[superflya]

no u've got to have something with a known concentration in the burette e.g 1M HCl.

not 100% sure, correct me guys.

[simonhu81292]

rinse the volumetric flask with distilled water
rinse the burette with standard sodium carbonate.
rinse the pipette with the conrete cleaner solution ..
(correct me if i am wrong :] thanks
 :smitten:

[physics]

no u've got to have something with a known concentration in the burette e.g 1M HCl.

not 100% sure, correct me guys.

meaning the conical flask contains an unknown concentration?

[Edmund]

A pipette contains the dilute conrete cleaner solution.
The burette contains the standard sodium carbonate.
And the conical flask contains the conrete cleaner.

What would u rinse the tools  with?
i said the tools are just rinsed with what they are filled with...

but the options invovle rinsing with distilled water, the dilute conrete solution or the standard sodium solution.

THANKS

and i'm just confused of where the standard soluton goes...it goes in the volumetric flask right?
and the substance with unknown concentration goes in the burette?

That's correct, you can rinse the tools with what they are filled with.

The volumetric flask (for the standard solution) can be rinsed with water, since it will be diluted with water anyway

[physics]

rinse the volumetric flask with distilled water
rinse the burette with standard sodium carbonate.
rinse the pipette with the conrete cleaner solution ..
(correct me if i am wrong :] thanks
 :smitten:

how about the conical flask?

[simonhu81292]

ok.. this is what i think .. the pipette delivers the aliquot in to the volumetric flask  or conical flask ...
then the burette measures the know amount (titre) and it also gets delivered into the volumetric flask ...

[superflya]

no u've got to have something with a known concentration in the burette e.g 1M HCl.

not 100% sure, correct me guys.

meaning the conical flask contains an unknown concentration?

yea.

[physics]

oh alright. but i have this prac where we have the standard soluton for both the base and acid... but we still have to do a titration to determine the nitrogen content of lawn fertiliser...
so what are we finding? the nitrogen content?
but i thought titration was used to find an unknown concentration???

[superflya]

probably finding phosphor content.

[QuantumJG]

A pipette contains the dilute conrete cleaner solution.
The burette contains the standard sodium carbonate.
And the conical flask contains the conrete cleaner.

What would u rinse the tools  with?
i said the tools are just rinsed with what they are filled with...

but the options invovle rinsing with distilled water, the dilute conrete solution or the standard sodium solution.

THANKS

and i'm just confused of where the standard soluton goes...it goes in the volumetric flask right?
and the substance with unknown concentration goes in the burette?

Pipette - Rinse with dilute concrete cleaner
Burette - Standard sodium carbonate solution
Conical Flask - Distilled water

Now why distilled water for the latter? The water doesn't effect the amount of HCl in the flask, so in essence you still require the same quantity of Na₂CO₃ to neutralize the HCl.

OMG I haven't done chem in almost 2 years and would probably fail.

[simonhu81292]

wow ... haven't done it in almost 2 years.. and still remember this stuff.. tank!!

[simonhu81292]

oh alright. but i have this prac where we have the standard soluton for both the base and acid... but we still have to do a titration to determine the nitrogen content of lawn fertiliser...
so what are we finding? the nitrogen content?
but i thought titration was used to find an unknown concentration???

yeah.. the nitrogen content in the lawn feriliser...
maybe the mass or percentage of the nitrogen content