$19.90 for pH Paper
AB Dispenser
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AB Dispenser
Order
pH Litmus Papers,
Solutions & Pencils
Full Range 0-14, Wide Range/Short Range Kits, pH Measure All Sets
pH Short Ranges
0-3, 3-5.5, 4.5-7.5, 5.5-8, 8-9.5, 9-13, 12-14.
Test saliva or urine
AB Dispenser
Red & Blue Litmus
pH Books
Test Water
Pond or Tap Water, Acid Rain, Water Hardness, Drinking Water, Humidity
Purify Water
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Hydrion AB Dispenser
pH Paper, Litmus Paper
Sharp color change every 2 pH units.
Double Roll- each 15' with Color Charts.
Hydrion
AB Dispenser
 The Hydrion AB Dispenser is a very popular dispenser. The color changes are sharp and
follow the natural spectral changes known to most chemists. Dip and read pH test papers,
30 feet total.
The Hydrion A & B Dispenser consists of two rolls of Hydrion Papers. One Color
Chart covers the Even (Type A) pH Range 2-4-6-8-10. The other Chart covers the Odd
(Type B) pH Range 1-3-5-7-9-11. This dispenser contains thirty feet of pH paper which
enables you to make over 200 tests.
For determining pH acidity/alkalinity of buffered aqueous solutions, cutting oil emulsions,
solutions of inorganic and organic salts, tanning liquors, textile size and dye baths,
drilling muds and other aqueous solutions.
Immerse piece of pH paper in solution to be tested. Remove and promptly compare with specimen colors on dispenser to determine corresponding pH.
Hydrion papers work best with buffered solutions.
Unbuffered solutions should be tested with Lo
Ion Kits.
$19.90 for Hydrion AB Dispenser (Double Roll) with Color Charts
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Order
AB Dispenser pH Paper
One Strip - One Dip - One Match
Only one color to match for a clear and positive result. Hydrion pH papers provide
a simple fast and reliable method of pH measurement. Just dip paper and match to the color
chart. Tap, pond and rain water should be tested using Hydrion
Lo-Buff Lo Ion pH Test Paper.
Ions and Water
Water undergoes an acid-base equilibrium of its own: H20 + H20 = H30+ + OH-. Whenever an
aqueous solution has [H3O+] = [OH-], that solution will be neutral and have a pH = 7. An excess
of [H3O+] over [OH-] will result in an acidic solution, while an excess of [OH-] over [H3O+]
will result in a basic, or alkaline solution. It turns out that various ions can react with
water and so disturb the delicate balance between [H3O+] and [OH-], which is a characteristic
property of pure water. This process is hydrolysis of the ion.
Acids
An acid is a substance which can donate a proton (H+ ion) to some other substance. It is therefore a >proton donor.
Acids tend to have a sour taste (vinegar, for example, contains ethanoic acid, and lemon juice contains citric acid). Tasting unknown chemicals in order to try and identify them is an extremely dangerous practice, and should never be done.
Acids which are commonly found in the laboratory are hydrochloric acid, HCl (still sometimes called by its ancient name spirits of salts), nitric acid, HNO3, and sulphuric acid, H2SO4 (commonly called oil of vitriol in some parts of the world).
Bases
A base is a substance which can accept a proton from other substances. It is therefore a proton acceptor.
Many alkalis (bases) have a soapy feel. Beware of strong alkalis, such as sodium hydroxide, as these substances can cause serious damage to the skin. Bases which are commonly found in the laboratory are sodium hydroxide (caustic soda), NaOH, potassium hydroxide (caustic potash), KOH, and ammonium hydroxide (an aqueous solution of the gas ammonia, NH3). Metal carbonates are also bases.
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