which solution showed the greatest pH change and why? which solution showed litt
ID: 963805 • Letter: W
Question
which solution showed the greatest pH change and why?
which solution showed little to no pH change and why?
What is the function of a buffer?
Normally the pH blood in the human body is maintained in a very narrow range between 7.35 and 7.45. A patient having an acidic blood pH of 7.3 may be treated with a mild base such as NaHCO3. Why should this treatment raise the pH of blood?
Buffer Water 5 pH initial pH after adding 5 drops4 0.1 M HC pHl change pH initial pl after adding 5 drops of 12 0 10 5 0.1 M NaQH pH change 7 0Explanation / Answer
1) Since the intial pH of solution is 5.0, intial solution is slightly acidic. Addition of few drops of NaOH changes it pH to basic range. We observed lot of pH difference while addition of NaOH.
2) A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acidand its conjugate base, or vice versa. Its pH changes very little when a small or moderate amount of strong acid or base is added to it and thus it is used to prevent changes in the pH of a solution. addition of little amount of base or acid doesnt change the pH of solution.
3) Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. Many life forms thrive only in a relatively small pH range so they utilize a buffer solution to maintain a constant pH.
4) NaHCO3 is weak base, addition of weak base to the blood with 7.3 pH leads to the increasing its pH.
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