Definitions for ph indicator
ph indi·ca·tor

WiktionaryRate this definition:4.0 / 1 vote

1. pH indicatornoun

   An acid-base indicator.

WikipediaRate this definition:0.0 / 0 votes

1. 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. Hence, a pH indicator is a chemical detector for hydronium ions (H3O+) or hydrogen ions (H+) in the Arrhenius model. Normally, the indicator causes the color 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. The pH value of a neutral solution is 7.0 at 25°C (standard laboratory conditions). Solutions with a pH value below 7.0 are considered acidic and solutions with pH value above 7.0 are basic. Since most naturally occurring organic compounds are weak electrolytes, such as 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 redox titrations (titrations involving one or more redox reactions as the basis of chemical analysis).

WikidataRate this definition:1.0 / 2 votes

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.

How to pronounce ph indicator?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say ph indicator in sign language?

Numerology

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. Tayyip Erdogan:

   Why don't they hand him over? Why do they keep making insinuations? He (Gulen) lives there. Don't you think this is an apparent indicator? This is the impression people have, why does he live in the United States? These are details we notice.

2. Hugo Brennan:

   Fuel subsidy cuts definitely can be a leading indicator for protests.

3. Hiroshi Nakamura:

   I think the market has overreacted to the yield curve inversion because the San Francisco Fed has said it is the most reliable indicator, i expect some correction to the latest rally in bonds. For now we have to see this week's auctions.

4. Michael Skvarla:

   Entomology can function as a leading indicator for ecology, the fact that this insect was spotted in a region that it hasn’t been seen in over half a century tells us something more broadly about the environment.

5. Jeffrey Gundlach:

   This is a very dangerous part of the cycle, we're 10 years into an expansion and it seems clear that the Fed has overtightened. Unemployment is a lagging indicator. And negative interest rates can be found in many places. If the(Fed's) goal is to keep the expansion going, they need to be more aggressive. You have to think bigger than a so-called (and mislabeled) insurance rate cut.

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Ph_Indicator
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Ph_Indicator
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=ph indicator