Sciencemadness Discussion Board
Not logged in [Login - Register]
Go To Bottom

Printable Version  
Author: Subject: pH paper: 1 colour vs multicolour?
fusso
International Hazard
*****




Posts: 1502
Registered: 23-6-2017
Location: ∥ universe
Member Is Online

Mood: Haidrofobik

[*] posted on 31-3-2019 at 08:02
pH paper: 1 colour vs multicolour?


I've seen 2 types of pH paper, 1 is the plain yellow coloured strip, another is a few patches on the same strip, and different patches will turn into different colours when dipped into the same solution.
Which is superior?




Useful sites:
Balance Chemical Equation: http://www.webqc.org/balance.php
Molecular mass and elemental composition calculator: https://www.webqc.org/mmcalc.php
Solubility table: https://en.wikipedia.org/wiki/Solubility_table
Azeotrope table: https://en.wikipedia.org/wiki/Azeotrope_tablesIt's not crime if noone finds out - Nyaruko
List of materials made by ScienceMadness users: https://docs.google.com/spreadsheets/d/1nmJ8uq-h4IkXPxD5svnT...
View user's profile View All Posts By User
SWIM
National Hazard
****




Posts: 423
Registered: 3-9-2017
Member Is Offline

Mood: feeling a little stiff after that 2,4,5 trioxin exposure.

[*] posted on 31-3-2019 at 08:26


I've never even seen either of those.

How about pink?
Or blue?
Or that Hydrion wide range multi-color stuff?




Do you want red P?
Eat lots of beets.
View user's profile View All Posts By User
fusso
International Hazard
*****




Posts: 1502
Registered: 23-6-2017
Location: ∥ universe
Member Is Online

Mood: Haidrofobik

[*] posted on 31-3-2019 at 08:38


This is the multicolour I'm talking about :
https://www.ebay.com/itm/100pcs-PH-Indicator-Test-Strips-1-1...




Useful sites:
Balance Chemical Equation: http://www.webqc.org/balance.php
Molecular mass and elemental composition calculator: https://www.webqc.org/mmcalc.php
Solubility table: https://en.wikipedia.org/wiki/Solubility_table
Azeotrope table: https://en.wikipedia.org/wiki/Azeotrope_tablesIt's not crime if noone finds out - Nyaruko
List of materials made by ScienceMadness users: https://docs.google.com/spreadsheets/d/1nmJ8uq-h4IkXPxD5svnT...
View user's profile View All Posts By User
draculic acid69
National Hazard
****




Posts: 262
Registered: 2-8-2018
Member Is Offline


[*] posted on 31-3-2019 at 08:43


Those ones are generally used for swimming pools and stuff.get both for improved accuracy.
View user's profile View All Posts By User
Sulaiman
International Hazard
*****




Posts: 2445
Registered: 8-2-2015
Location: Shah Alam, Malaysia
Member Is Offline


[*] posted on 31-3-2019 at 10:03


One difference is that the cheap pH 1-14 papers that I use react to just one drop of sample liquid,
and a small piece can be dropped in a beaker/flask/test tube.




CAUTION : Hobby Chemist, not Professional or even Amateur
View user's profile View All Posts By User
Ubya
International Hazard
*****




Posts: 611
Registered: 23-11-2017
Location: Rome-Italy
Member Is Offline

Mood: I'm a maddo scientisto!!!

[*] posted on 31-3-2019 at 12:37


with universal ph paper (the yellow one)you usually add 1 drop of solution to the paper, while the other kind is dipped in the solution.
i don't know which is more accurate (they also sell "universal ph paper" but for narrower ph intervals to be more accurate with your measuring), butin general would be better to bring a drop of the sample to the ph paper and not dip the paper in the solution (to avoid contamination, yea i know is minor but is a good habit)





---------------------------------------------------------------------
feel free to correct my grammar, or any mistakes i make
---------------------------------------------------------------------
View user's profile View All Posts By User
CharlieA
National Hazard
****




Posts: 426
Registered: 11-8-2015
Location: Missouri, USA
Member Is Offline

Mood: No Mood

[*] posted on 31-3-2019 at 16:54


I don't see much difference between applying a drop to the paper (which is 1 color before being placed in contact with the test solution) or the paper to the solution, except for the possibility of contamination as Ubya stated above (ciao, senore). Bringing a drop to the paper is best practice.
View user's profile View All Posts By User

  Go To Top