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Hint: pH scale is a logarithmic scale and pH 7.5 and 5.5 values differ by 2.
Complete answer:pH expresses logarithmic function of H+ ion concentration of an aqueous solution. It determines the acidity or basic nature of a solution. pH 7 is neutral. A pH value more than 7 indicates basicity while value less than 7 indicates acidic nature. The large intestine is much more acidic than the small intestine; hence, making the large intestine more appropriate for the digestion process.
pH scale is not a linear scale (e.g. centimetre scale). In linear scale two adjacent values have the same difference. But on a logarithmic scale it is different. In a logarithmic scale two adjacent values can increase or decrease by a factor of 10. From the question we can see pH of small intestine- 7.5 and pH of large intestine- 5.5 differ by 2 (from general point of view). But the difference in H+ ion concentration between them is actually (10)2= 100 times. As substances travel from the small intestine to large intestine, the H+ ion concentration increases 100 times.
So, the correct answer is ‘Increases 100 fold’.
Note: pH scale values range from 1 to 14 and 7 is considered neutral pH because it is the pH value of pure water which is neither acidic nor basic.
Complete answer:pH expresses logarithmic function of H+ ion concentration of an aqueous solution. It determines the acidity or basic nature of a solution. pH 7 is neutral. A pH value more than 7 indicates basicity while value less than 7 indicates acidic nature. The large intestine is much more acidic than the small intestine; hence, making the large intestine more appropriate for the digestion process.
pH scale is not a linear scale (e.g. centimetre scale). In linear scale two adjacent values have the same difference. But on a logarithmic scale it is different. In a logarithmic scale two adjacent values can increase or decrease by a factor of 10. From the question we can see pH of small intestine- 7.5 and pH of large intestine- 5.5 differ by 2 (from general point of view). But the difference in H+ ion concentration between them is actually (10)2= 100 times. As substances travel from the small intestine to large intestine, the H+ ion concentration increases 100 times.
So, the correct answer is ‘Increases 100 fold’.
Note: pH scale values range from 1 to 14 and 7 is considered neutral pH because it is the pH value of pure water which is neither acidic nor basic.
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