What does ph indicator mean?

Definitions for ph indicator
ph indi·ca·tor

Here are all the possible meanings and translations of the word ph indicator.

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  1. pH indicatornoun

    An acid-base indicator.


  1. pH indicator

    A pH indicator is a halochromic chemical compound that is added in small amounts to a solution so that the pH of the solution can be determined visually. Hence a pH indicator is a chemical detector for hydronium ions or hydrogen ions in the Arrhenius model. Normally, the indicator causes the colour of the solution to change depending on the pH. Indicators can also show change in other physical properties; for example, olfactory indicators show change in their odor. At 25 °C, considered the standard temperature, the pH value of a neutral solution is 7.0. Solutions with a pH value below 7.0 are considered acidic, whereas solutions with pH value above 7.0 are basic. As most naturally occurring organic compounds are weak protolytes, carboxylic acids and amines, pH indicators find many applications in biology and analytical chemistry. Moreover, pH indicators form one of the three main types of indicator compounds used in chemical analysis. For the quantitative analysis of metal cations, the use of complexometric indicators is preferred, whereas the third compound class, the redox indicators, are used in titrations involving a redox reaction as the basis of the analysis.

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  1. Chaldean Numerology

    The numerical value of ph indicator in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of ph indicator in Pythagorean Numerology is: 9

Examples of ph indicator in a Sentence

  1. Zhou Xiaochoan:

    For the central bank, we think basically to keep monetary policy stable because this is not a nationwide serious problem, generally, if the average indicator of the Chinese economy is OK, the way for the central bank to have a specific policy targeted to the real estate market is difficult.

  2. Christian Dalsgaard:

    Patients can be [made] aware of increased swelling, edema is not well understood but is an indicator something is wrong.

  3. Daniel Ives:

    This as another indicator the Nokia acquisition was a $7 billion head-scratcher deal that remains an overhang for Microsoft, nadella inherited this headache, now he is trying to make the best of a bad acquisition.

  4. Kristina Hooper:

    That's the funny thing about the stock market. It's an unusual indicator because it's dominated by emotions, we have to be careful not to assume we're heading into a recession.

  5. Gavin Schmidt:

    The last seven years have all been more than 1-degree Celsius above the 19th century -- and that's large enough on a planetary scale to start showing up much, much more clearly in local and regional and extreme events, the global warming is now large enough that it's an indicator of all those other things that we're already seeing. So, we're now seeing global warming quite locally in ways that, a decade ago or maybe 20 years ago, was still unclear.


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