Red Litmus Paper

ACID A chemical compound whose aqueous solution turns blue litmus paper red, reacts with and dissolves certain metals to form salts, and reacts with bases to produce salts and water. They are capable of transfeiTing a hydrogen ion (proton) in solution. 

Examples include hydrochloric acid, nitric acid, and sulphuric acid. These are strong acids which are almost completely dissociated in water. Weak acids, such as hydrogen sulphide, are poorly dissociated producing low concentrations of hydrogen ions. Acids tend to be coiTosive with a sharp, sour taste and turn litmus paper red they give distinctive colour changes with other indicators. Acids dissolve metals such as copper and liberate hydrogen gas. They also react with carbonates to liberate carbon dioxide ... 

Chlorine (CI2) turns damp blue litmus paper red, then bleaches it. 

Turns litmus paper red. Turns litmus paper blue. 

Perhaps no two classes of compounds are more important in chemistry than acids and bases. All acids have several properties in common They have a sour taste, and they all react with most metals to form hydrogen gas (Hj) and with baking soda to form carbon dioxide (CO2). All acids turn blue litmus paper red, and their solutions conduct electricity because acids form ions when dissolved in water. t 11 bases also share several common properties They have a bitter taste, their solutions feel slippery like soapy water, and they turn red litmus paper blue (the opposite of acids). Solutions of bases also conduct electricity because they too form ions in water. Acids are similar because they produce hydrogen ion, (aq), in water. Bases, on the other hand, all form hydroxide ion, 0 [ (aq), in water. These ions are responsible for the properties of acids and bases. 

Turn blue litmus paper red Turn red litmus paper blue... 

Initiation Sensitivity — 0,20g MF for sample at d 0.94 Power by CUP (Modified Trauzl Test) — 113.5% PA (Sch 113%) Stability at 100°— turns litmus paper red in 43.5 hrs (Sch 28.75 hrs). Although its expl props and stability are slightly more favorable than those of Schnei-derice, it is not recommended by Ficheroulle as a bursting chge of projectiles in lieu of Schneiderite due to its higher cost... 

When the azide is destroyed, which is indicated by the sample turning litmus paper red and starch-iodide paper blue, pour the soln into a sink (See also under Destruction or Killing of LA) k)By means of a plastic or wooden spatula transfer the wet ppt to an open A1 dish l)Dry the sample for 8-15 hrs (but no more than 24 hrs) at 65° and examine it under the microscope. The LA crystals should be approximately spherical in shape, opaque in appearance, averaging not over 0.07 mm in diam. They should be free flowing and contain an average of 92.5% Pb(Ns)j. There should be no needle-shaped crysts. The yield will be ca 5 g m)If it is desirable to save the sample, wet it with a small amt of HaO and transfer to a rubber-stoppered plastic or hard rubber bottle... 

An acid turns blue litmus paper red and a base turns red litmus paper blue. Are the whiting compounds acidic or basic ... 

It was recognized centuries ago that many substances could be divided into the two general categories. Acids have a sour taste (as in lemon juice), dissolve many metals, and turn litmus paper red. Bases have a bitter taste (as in soaps), feel slippery, and turn litmus paper blue. The chemical reaction between an acid and a base is called neutralization. The products of neutralization reactions are neither acids nor bases. Litmus paper is an example of an acid-base indicator, a substance that changes color when added to an acid to a base. 

Ferrous ammonium sulphate Q. 73 Ferrous sulphide for H2S generator IV, VIII, X, P. 70 Lead dioxide IV, IX Lead monoxide IV, IX Lead nitrate Q. 47, IX Litmus paper, blue Litmus paper, red Magnesium metal, powder IV Magnesium metal, ribbon II, IV, V, VIII... 

At room temperature, while stirring with a glass rod, add 6 mol/L NaOH, drop by drop, until the solution is basic to red litmus paper. (Red litmus paper turns blue in basic solution.) Do not put the red litmus paper in the solution. Dip the glass rod into the solution and touch it to the red litmus paper. Record your observations. 

Litmus Paper, Red Usually about 6 x 50 mm in size. Red litmus meets the requirements for Phosphate, Residue on Ignition, and Rosins, Acids, etc., under Litmus Paper, Blue. 

The product is recognized (a) by its pungent odour and the production of white fumes, consisting of fine drops of hydrochloric acid, on blowing across the mouth of the tube, (b) by the formation of white clouds of ammonium chloride when a glass rod moistened with ammonia solution is held near the mouth of the vessel, and (c) by its turning blue litmus paper red. 

The gas dissolves readily in water, with the evolution of a large amount erf heat. The solution is called hydrochloric acid. Hydrochloric acid is a strong acid—it has a very acidic taste, turns blue litmus paper red, dissolves zinc and other active metals with the evolution of hydrogen gas, and combines with bases to form salts. The salts formed by hydrochloric acid are called chlorides. 

Which required more acid to turn the blue litmus paper red the water or the antacid solution ... 

Acids cause indicators to change color. For example, they turn litmus paper red. 

The resulting hydronium ion (H30+) shows that the ammonium chloride solution is acidic. It shows acidic properties. It turns litmus paper red (Figure 16). 

When carbon-dioxide dissolves in water, it forms an acidic solution which turns moist blue litmus paper red. 

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