The Ph Of A Solution

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The pH of a solution is a measure of the hydrogen ion concentration in the solution. It can be defined as the negative log of the hydrogen ion concentration. pH = - log [H+] When the pH of a solution is below 7, it is an acidic solution. This means that there is a higher concentration of free H+ ions in the solution. When the pH of a solution is above 7, it is a basic solution and it means that there is a higher concentration of OH- ions in the solution. This is because the bases tend to lose their electrons and bond with protons. So When the pH = 7, the solution is neutral. In other words, the acidity of the solution decreases with higher pH values. The pH…show more content…
The salts can be derived from strong acids and bases making the solution neutral, from strong acids and weak bases making the solution acidic, from weak acids and strong bases making the solution basic and from weak acids and weak bases making the solution neutral. Buffers are solutions that resist changes in pH. They contain a Bronsted – Lowry conjugate acid – base pair where either the acid or the base is a weak electrolyte. They play an important role in our life processes. The chemical reactions take place at a specific pH in our body and it is very vital to maintain that pH. When there arise some changes in the pH, this is where buffers come into play. For example, the carbonic acid base buffer helps to achieve the acid-base balance in the blood. Buffers also help to maintain the homeostasis of the cells. Antacids help people with their heartburns, which are caused due to excess acid that tries to escape through the pyloric sphincter into the esophagus. This therefore causes heartburn. Antacids behave as buffers by neutralizing the excess acid present in the stomach. Examples of antacids are Alka Selzer, Tums, Briochi, Pepto-Bismol, Bromo –Selzer, Rolaids, Maalox, Mylanta etc. Antacids have a certain neutralizing capacity and the greater it is, more
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