Talk:pH

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Swimming pools and spas

Someone ought to add information about pH in swimming pools and spas, since pH is very important in the upkeep of swimming pool and spa water. The "proper" pH for a pool is said to be 7.6 (with an acceptable range of 7.2-7.8)^[1], 7.6 in 60 degree F waters and 7.3 in 80 degree F waters^[2], between 7.2 and 7.6^[3], and 7.2, with an acceptable range of between 7.0 and 7.6^[4]. Different reasons are sometimes given, although not always: I noticed two separate pieces here claiming different pHs for the human eye (one says 7.2 and the other says 7.6), and other sources give calcium carbonate production and chlorine sanitation effectiveness as reasons for an ideal pH. Can someone come up with a reasonable account of what a "good" pH is for a swimming pool and spa, and why? — Rickyrab | Talk 04:20, 30 August 2009 (UTC)[reply]

I found myself having to enter a space for the ezine articles.com site because it was on a Wikipedia global blacklist. While I appreciate the need to protect against spam, this particular reference to that website was warranted because I was discussing various sources as to proper pool pH, and several of those sources are commercial entities. — Rickyrab | Talk 04:29, 30 August 2009 (UTC)[reply]

^ http://www.tps.com.au/pools/index.htm
^ http://www.lamotte.com/pages/pool/handbook/chapter3.html
^ http://e zinearticles.com/?Swimming-Pool-PH---What-is-it-and-How-to-Keep-it-Balanced&id=2328571
^ http://www.havuz.org/pool_pool/pool_maintenance/water_testing/ph.htm

JIZZZ!! —Preceding unsigned comment added by 204.169.239.254 (talk) 16:03, 1 December 2009 (UTC)[reply]

Molar link

The link from the term "molar" in the introduction points to the disambiguation page. The context seems to indicate that "molar (concentration)" is meant. Could an established editor re-link this please?

Msramming (talk) 02:26, 18 December 2009 (UTC)[reply]

Done. Vsmith (talk) 02:38, 18 December 2009 (UTC)[reply]

pH is retarded.

Multiple reasons. Moles have no physical significance. Base 10 has no physical significance. In general you want your argument to exponents or logarithms to be unitless otherwise you end up with hideous units like log(particles/mole) instead of 1. The obvious unit to use is ln(parts H+/all parts) which is unitless and calc friendly.-Craig Pemberton 07:45, 22 December 2009 (UTC)[reply]

pH is dimensionless because it's a logarithm of a dimensionless quantity called activity. (see the very first sentence of PH#Definitions) --Cubbi (talk) 18:51, 22 December 2009 (UTC)[reply]

If pH 1 is equal to 602214150000000000000000 active hydrogen ions per litre, how can it be a dimensionless quantity? Åkebråke (talk) 19:22, 22 December 2009 (UTC)[reply]

pH levels of juices

What are the pH levels of orange juice, lemon juice, and apple juice?

[1] ttp://www.tps.com.au/pools/index.htm

[2] ttp://www.lamotte.com/pages/pool/handbook/chapter3.html

[3] ttp://e zinearticles.com/?Swimming-Pool-PH---What-is-it-and-How-to-Keep-it-Balanced&id=2328571

[4] ttp://www.havuz.org/pool_pool/pool_maintenance/water_testing/ph.htm

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[2]

[3]

[4]