) Select the appropriate pi range for each of the solutions below A) pH7 B) H-7
ID: 1044518 • Letter: #
Question
) Select the appropriate pi range for each of the solutions below A) pH7 B) H-7 a) solution of NiHs c) solder, of CHCOOH- b) solution of NiHs ttrated to equivalence point with HC d) Solton of CHCOOH wated to eOivalence port with NaOH Consider the following ttration curve of which shows the itration of a weak acid with NaOH. Let HA represent the acid form and A represent the acid form a) Which letter best indicates the equivalence point? b) Which letter best indicates where the pH pKa c) Which letter indicates where moles of NaOH added is greater than moles of weak acid present? d) Which letter indicated where buffering would be best? ) Which letter indicates where (A] is present, (HA) OM Which letter indicates where [HA]>A? 125 25375 so 625 7587 8) Consider the curve again. What reaction or solution composition would be mL of NaOH employed to determine the pH at the following points? Choices a) weak acid ionization c) buffer solution d) excess strong acid b) weak base ionization ) excess strong baseExplanation / Answer
Ans 6 :
The solutions that are acidic in nature have their pH below 7 , the ones that are basic have pH more than 7 ,and the neutral ones have pH equal to 7
So here :
a) solution of NH3 : pH > 7
b) solution of NH3 titrated to equivalence point with HCl : pH < 7
c) Solution of CH3COOH : pH < 7
d) solution of CH3COOH titrated to equivalence point with NaOH : pH > 7
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