Discussion on Acid Bases and Salt


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Posted on: 04:04:24 PM on June 7, 2013
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Plz i want an explaiantn fr the uses of ph scale


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Posted on: 09:38:27 AM on September 2, 2013
becase ph scale is used for checking the ph value therefore we will know that the solution is basic or acidic

Posted on: 07:51:46 PM on September 11, 2014
The pH scale is an indication of acidity/alkalinity. The pH scale is a measure of the concentration of hydrogen ions (acid) or hydroxyl ions (alkali) in a solution. Weak acids are in some common foodstuffs such as vinegar and citric acid. These acids have sour tastes. A pH value less than 7 is said to be acidic. A pH value greater than 7 is said to be alkaline. A pH value equal to 7 is said to be neutral. Strong acids turn Universal Indicator red and strong alkalis turn it blue. Other acids and alkalis form a range of colours which can be used to indicate the value of pH (see diagram on worksheet E3.3). Another well-known indicator of acidity/alkalinity is Litmus. Litmus is red in acidic solutions and blue in alkaline solutions. Acids and alkalis can both be corrosive. When alkalis react with acids they form a salt plus water. Note that a salt is used to describe a compound formed from acids. It does not just refer to common salt which we use on food.

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