Talk:Potassium/GA1

GA Review

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Reviewer: FREYWA 10:51, 16 June 2011 (UTC)

Hello again, after a long time! This will follow the same structure as my earlier review on cadmium. FREYWA 10:51, 16 June 2011 (UTC)

Review

GA review – see WP:WIAGA for criteria

1. Is it reasonably well written?

   A. Prose quality:

   B. MoS compliance for lead, layout, words to watch, fiction, and lists:

2. Is it factually accurate and verifiable?

   A. References to sources:

   B. Citation of reliable sources where necessary:

   C. No original research:

3. Is it broad in its coverage?

   A. Major aspects:

   B. Focused:

4. Is it neutral?

   Fair representation without bias:

5. Is it stable?

   No edit wars, etc:

6. Does it contain images to illustrate the topic?

   A. Images are copyright tagged, and non-free images have fair use rationales:

   B. Images are provided where possible and appropriate, with suitable captions:

7. Overall:

   Pass or Fail:

   All remaining issues are minor enough to be insignificant. The article is therefore passed.

Comments

Don't leave problems here. Instead, put them in the Issues section below.

I think Stone and I addressed most of the issues below. Materialscientist (talk) 07:30, 20 June 2011 (UTC)

Thank you Look at the rest of them. FREYWA 19:15, 20 June 2011 (UTC)

All should mostly be fixed by now. Materialscientist (talk) 01:52, 21 June 2011 (UTC)

Thank you FREYWA 06:45, 21 June 2011 (UTC)

Issues

You are free to leave any issues you may find; this does not require permission.

Error: Potassium and Kidney stones 2012.04.14

This article says without citation that "Individuals suffering from kidney diseases may suffer adverse health effects from consuming large quantities of dietary potassium."

However the Wiki article http://en.wikipedia.org/wiki/Kidney_stones#Other_electrolytes says that potassium reduces the risk of forming kidney stones and cites a study (I read it, it really does say that multiple times). http://content.karger.com/produktedb/produkte.asp?typ=fulltext&file=000317196 Could you please look into this? Thank you. — Preceding unsigned comment added by 195.212.29.185 (talk) 01:57, 14 April 2012 (UTC)

6b

• The picture at Physical has a bad caption of "The flame-test colour of potassium". The caption should mention the colour.

  Thank you That wasn't really needed! FREYWA 19:15, 20 June 2011 (UTC)

• There is no caption for the picture at Biochemical function.

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Reference ranges for blood tests - by molarity at Filtration and excretion - replace with Blood values sorted by mass and molar concentration. FREYWA 06:20, 17 June 2011 (UTC)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

2b

The following phrases are unsourced.

• Potassium therefore does not readily form compounds with the oxidation state of +2 (or higher). (Physical)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Potassium concentration in solution is commonly determined using flame photometry, atomic absorption spectrophotometry, inductively coupled plasma, or ion selective electrodes. (Physical) FREYWA 09:59, 17 June 2011 (UTC)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Potassium metal is a powerful reducing agent which is easily oxidized to monopositive cation, K+. Once oxidized, it is very stable and hard to reduce back to neutral metal. (Compounds)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• All the prose from The last two species to and 1.21 kilogram of it can dissolve as much as a liter of water. (Compounds)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Outside of dating, potassium isotopes have been used as tracers in studies of weathering and for nutrient cycling studies because potassium is a macronutrient required for life. (Isotopes)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Because it cannot be cut off completely, death will result when the whole body potassium declines to the vicinity of one-half full capacity. (Filtration and excretion)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• All the prose from Typical medical supplemental doses to buildup of blood concentrations of potassium (hyperkalemia) may trigger fatal cardiac arrhythmia. (Medical supplementation and disease)
• It is also used to bleach textiles and straw, and in the tanning of leathers. (Food)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Potassium fluorosilicate (K₂SiF₆) is used in specialized glasses, ceramics, and enamels. (Industrial) FREYWA 04:36, 18 June 2011 (UTC)

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

1b

• The lead section does not make much mention of the precautions required for handling potassium. FREYWA 08:22, 18 June 2011 (UTC)

  Thank you Nah, never mind! FREYWA 19:15, 20 June 2011 (UTC)

1a

Issues not subcategorised are in the lead section.

• For this reason, historically their salts were not differentiated. Wrong place.

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• They were finally suspected to be different elements within their salts after 1702, and this was finally proven in 1807 when potassium and sodium were individually isolated from different salts by electrolysis. It is undesirable to have two occurences of the word in consecutive sentences.

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Potassium in nature occurs only as ionic salt. Should be in.

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Most industrial chemical applications of potassium employ the relatively high solubility in water of potassium compounds, for example, potassium soaps. Should be such as.

  Thank you FREYWA 19:15, 20 June 2011 (UTC)

• Potassium ion is necessary for the function of all living cells. Potassium ion diffusion is a key mechanism in nerve transmission, and potassium depletion in animals, including humans, results in various neurological dysfunctions. Can be merged.
• Properties
  • Physical
    • Because of the low first ionization energy (418.8 kJ/mol) potassium atom easily loses an electron and oxidizes into a monopositive cation, K⁺. No indefinite article.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • The second ionization energy, however, is very high (3052 kJ/mol), because removal of two electrons breaks the stable noble gas electronic configuration. A better sentence would contrast more strongly with the one preceding it.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • In a flame test, potassium and its compounds emit a lilac color with a peak emission wavelength of 766.5 nm (see movie below),[6].[5] Punctuation mash-up and reference errors.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

  • Chemical
    • It can react with salts of most metals to substitute them, but because of the sensitivity of potassium to water and air, the reaction are possible only at inert atmosphere, such as argon gas, and thus are rarely used. Wrong tense and swapped words (replace bolded text with reactions, only possible in an and are thus respectively).

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • However, potassium does not react with many hydrocarbons, such as mineral oil or kerosene. Redundant word.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • The reaction of potassium with water is dangerous because of its violent and sufficient exothermic character, and hydrogen gas release. Should be release of hydrogen gas.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • The potassium ion is colorless in water and is very hard to be precipitated; possible precipitation methods, useful for gravimetric analysis, include reactions with sodium tetraphenylborate, hexachloroplatinic acid, and sodium cobaltinitrite. Incorrect tense.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

  • Compounds
    • The only common oxidation state for potassium is +1; even though oxidation state −1 is known in alkalide ion, it is extremely rare and has only theoretical interest. No need to mention in the sentence's context.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • Potassium metal is a powerful reducing agent which is easily oxidized to monopositive cation, K⁺. Again, no indefinite article.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

    • This compound is a very strong alkali with a high thermal stability, and 1.21 kilogram of it can dissolve as much as a liter of water. Is it singular or not?

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

  • Isotopes
    • It decays to stable ⁴⁰Ar (11.2% of decays) by electron capture or positron emission; the remaining 88.8% decays to stable ⁴⁰Ca by beta decay. The brackets can be pulled out.

      Thank you FREYWA 19:15, 20 June 2011 (UTC)

  • Creation and occurrence
    • The deposits of niter (potassium nitrate) formed by decomposition of organic material in contact with atmosphere, mostly in caves. Because of the good water solubility of niter the formation of larger deposits requires special environmental conditions. These two sentences can be merged. The first the should be removed per the previous sentence (which also begins with the). Formed should have are before it. FREYWA 08:09, 19 June 2011 (UTC)

• • • Thank you FREYWA 19:15, 20 June 2011 (UTC)

At the time of Materialsceintist's first comment, the issues below had not been put up.

---

• Commercial production
  • The largest deposits ever found lie thousand meter (three thousand feet) below the surface of the Canadian province of Saskatchewan. Numbers?

    Thank you FREYWA 06:45, 21 June 2011 (UTC)

  • Although the electrolysis process was developed and used in industrial scale in the 1920 the thermal method by reacting sodium with potassium chloride in a chemical equilibrium reaction became the dominant method in the 1950s. Huh?

    Thank you FREYWA 06:45, 21 June 2011 (UTC)

  • For some time the Griesheimer process employing the reaction of potassium fluoride with calcium carbide was also used . Spacing!

    Thank you FREYWA 06:45, 21 June 2011 (UTC)

  • Reagent-grade potassium metal cost about $10.00/pound ($22/kg) in 2010 when purchased in tonne quantities. Incorrect tense.

    Thank you FREYWA 06:45, 21 June 2011 (UTC)

• Biological role
  • Filtration and excretion
    • Carbonyl groups inside the pore on the amino acids mimics the water hydration that takes place in water solution by the nature of the electrostatic charges on four carbonyl groups inside the pore. Subject-verb agreement?

      Thank you FREYWA 06:45, 21 June 2011 (UTC)

  • In diet
    • Optimal intake
      • Italian researchers reported in a 2011 meta-analysis that a 1.64 - gram higher daily intake of potassium was associated with a 21% lower risk of stroke. Abbreviations would be better here!

        Thank you FREYWA 06:45, 21 June 2011 (UTC)

• Applications
  • Fertiliser
    • Potassium content of most plants typically ranges from 0.5 to 2% of the harvested weight of crops, expressed as (K₂O), which is the conventional way fertilizer analysis is shown, in the order N, P, K. No indefinite article, redundant brackets, wrong number.

      Thank you FREYWA 06:45, 21 June 2011 (UTC)

  • Industrial
    • It is also used to saponify fats and oils, in industrial cleaners, and in hydrolysis reactions, for example of esters. I don't get it.

      It is used to saponify .., in cleaners, and in reactions .., for example, in reactions involving esters. Materialscientist (talk) 01:52, 21 June 2011 (UTC)

      Fix it! FREYWA 06:45, 21 June 2011 (UTC)

    • Potassium nitrate (KNO₃) or saltpeter is obtained from natural sources such as guano and evaporites or manufactured by the Haber process; it is the oxidant in gunpowder (black powder) and an important agricultural fertilizer. I read this word, doesn't immediately click. Should be saltpetre by international standards.

      Both writing styles are possible, the used one is AE.--Stone (talk) 21:22, 20 June 2011 (UTC)

      Thank you FREYWA 06:45, 21 June 2011 (UTC)

    • Potassium carbonate (K₂CO₃ or potash) is a mild desiccant, it is also used in the manufacture of glass, soap, color TV tubes, fluorescent lamps, textile dyes and pigments. Should be which. Remove the comma behind it.

      Thank you FREYWA 06:45, 21 June 2011 (UTC)

    • Potassium permanganate (KMnO₄) is an oxidizing, bleaching and purification substance and is used in for production of saccharin. Remove!

      Thank you FREYWA 06:45, 21 June 2011 (UTC)

"If potassium were removed from the diet, there would remain a minimum obligatory kidney excretion of about 200 mg per day when the serum declines to 3.0–3.5 mmol/L in about one week,[65] and can never be cut off completely, resulting in hypokalemia and even death.[66]" -incomprehensible — Preceding unsigned comment added by 218.214.143.74 (talk) 06:24, 29 March 2012 (UTC)