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2. pH indicator - Wikipedia

   en.wikipedia.org/wiki/PH_indicator

   A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually or spectroscopically by changes in absorption and/or emission properties. [1] Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the ...

3. pH - Wikipedia

   en.wikipedia.org/wiki/PH

   The neutral value of the pH depends on the temperature and is lower than 7 if the temperature increases above 25 °C. The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2]

4. Universal indicator - Wikipedia

   en.wikipedia.org/wiki/Universal_indicator

   Universal indicator. A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a solution. [1]

5. Acid–base titration - Wikipedia

   en.wikipedia.org/wiki/Acid–base_titration

   The pH after the equivalence point depends on the concentration of the conjugate base of the weak acid and the strong base of the titrant. However, the base of the titrant is stronger than the conjugate base of the acid. Therefore, the pH in this region is controlled by the strong base. As such the pH can be found using the following: [1]

6. Simple Green - Wikipedia

   en.wikipedia.org/wiki/Simple_Green

   Simple Green has been re-listed as an approved Surface Washing Agent per the EPA's National Contingency Plan after being de-listed in 1995. The new 2013 re-formulation, SW-65 was re-listed with the EPA on 7/09/2013 [6] [7] EPA toxicity testing reports that Menidia beryllina and Mysidopsis bahia survive slightly better in a water solution of 1:10 mixture of Simple Green with crude oil#2 (LC50 ...

7. Buffer solution - Wikipedia

   en.wikipedia.org/wiki/Buffer_solution

   A buffer solution is a solution where the pH does not change significantly on dilution or if an acid or base is added at constant temperature. [1] Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical ...