Identify the regions of acidity , neutrality , alkalinity of a substance on the pH scale using universal indicator solution
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The acidity or alkalinity of a solution is usually measured by concentration of hydrogen ions (H+) against the hydroxyl ions (OH-) and is expressed as pH level. It is measured by using a universal indicator or a litmus indicator.
A universal indicator is a pH indicator composed of a solution of several compounds that exhibits several colour changes over a pH value range from 0 to 14 to indicate the acidity or alkalinity of solutions, where 7 indicates neutral.
A Universal indicator has many different colour changes, from red colour for strongly acidic solutions to dark purple for strongly alkaline solutions. In the middle, neutral pH 7 is indicated by green.
When the universal indicator paper is used, more accurate results can be acquired when a small spot of the test solution is put on the paper, and it is left for 30 seconds for the colour to develop before comparing it with the colour chart.
A universal indicator is a pH indicator composed of a solution of several compounds that exhibits several colour changes over a pH value range from 0 to 14 to indicate the acidity or alkalinity of solutions, where 7 indicates neutral.
A Universal indicator has many different colour changes, from red colour for strongly acidic solutions to dark purple for strongly alkaline solutions. In the middle, neutral pH 7 is indicated by green.
When the universal indicator paper is used, more accurate results can be acquired when a small spot of the test solution is put on the paper, and it is left for 30 seconds for the colour to develop before comparing it with the colour chart.
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pH is actually the measure of hydrogen ions concentration. it is used to indicate the acidity or alkalinity of a solution as well as the neutrality .
Using of universal indicator is one of the the method for measuring pH of solutions.it contain the different colors from the 1 to 14 pH which actually indicate the hydrogen concentration. 7 is the neutral pH while lower than seven shows the acidity more the lower value more will be the acidity . More than 7 value indicate the alkalinity or basicity of a solution. All the different pH solution exhibit different color which can be determined by using the universal indicator paper and then the color is matched with the pH colors . so the pH is determned.
Using of universal indicator is one of the the method for measuring pH of solutions.it contain the different colors from the 1 to 14 pH which actually indicate the hydrogen concentration. 7 is the neutral pH while lower than seven shows the acidity more the lower value more will be the acidity . More than 7 value indicate the alkalinity or basicity of a solution. All the different pH solution exhibit different color which can be determined by using the universal indicator paper and then the color is matched with the pH colors . so the pH is determned.
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