pH strips

Background

Substances with the property to change color when they come into contact with an either acidic or basicsolution are called pH indicators. This is used in pH strips that changes color when they come into contactwith hydrogen ions (H+) and hydroxide ions (OH-).

Usually, pH strips are bought in packages with either 50 or 100 strips. pH strips are most useful for demonstration experiments or experiments where accuracy of the measured pH is of minor importance.

Using pH strips is simple. The strip is simply submerged in the aqueous solution and the reading of pH is done by comparing the color on the pH strip with the color on the package that the pH strips came in.

The accuracy of any pH reading is within 0.5 pH units.

pH strips pH strips

Web resources

Commercial company selling pH strips

Acids and bases - Broensted-Lowry definition

Acids and bases - Broensted-Lowry definition A more fundamental definition of acids and bases than the one provided on the index page was given by the Danish chemists Johannes Broensted. The definitions are:A Broensted acid is a proton doner.A Broensted base is a proton acceptor. The English chemist, Thomas Lowry, proposed exactly the same at roug...

Question about acetate buffer

Question about acetate buffer This is the long and computational answer to Debra's question about what happens when 100 mmol of HCl ispoured into an 100 ml acetate buffer (0.2 M) 06.07.2019 Author: Jim ...

Buffers

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PDF library

PDF library Note: Discussions about the pdf documents are found in the 'Help & Discussions' section. Inorganic chemistry subjects: Equilibriums 1 : A tutorial about how [CO2], [HCO3-] and[CO32-] are calculated from Total Inorganic Carbon.The pdf is here Ionic Strength 1 : An introduction about Ionic Strength with a simple calculation using H+...