Page 96 of 131 3. Examine the pH vs. volume curve for the titration of your unkn
ID: 1044855 • Letter: P
Question
Page 96 of 131 3. Examine the pH vs. volume curve for the titration of your unknown. Is there any evidense of more than one acidie proton on you unknown? If not then what would the gragh of an uwknsut hat has oe than one equivalence point look like? Calculate the molecular weight (equivalext weighi of your unknown 4. Suppose your unknown was a white solid which sboywed two equivalence poiels in the hao cusve If 0.2114 grams of unknown required 38.44 mL of 0.106 M NaOH to be completely nearlized, wtra is the molecular weight of this compound. Be sure to inclade the fact that there were two oivhense points in your answer.Explanation / Answer
3. If the titration curve shows only one equivalence point, we have a monoprotic acid that is acid has only one ionizable hydrogen in it.
The number of equivalence points in the titration curve is directly related to number of Hydrogens that can be ionized in an acid.
4. mass of unknown acid = 0.2114 g
moles NaOH used = 0.106 M x 0.03844 L
= 0.0041 moles
molar mass of unknown acid = 0.2114 g/0.0041 moles
= 52.0 g/mol
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