The following reactions can be used to prepare samples of metals. Determine the enthalpy change under standard state conditions
1 answer:
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Complete question is;
When a diprotic acid is titrated with a strong base, and the Ka1 and Ka2 are significantly different, then the pH vs. volume plot of the titration will have
a. a pH of 7 at the equivalence point.
b. two equivalence points below 7.
c. no equivalence point.
d. one equivalence point.
e. two distinct equivalence points
Answer:
Option E - Two Distinct Equivalence points
Explanation:
I've attached a sample diprotic acid titration curve.
In diprotic acids, the titration curves assists us to calculate the Ka1 and Ka2 of the acid. Thus, the pH at the half - first equivalence point in the titration will be equal to the pKa1 of the acid while the pH at the half - second equivalence point in a titration is equal to the pKa2 of the acid.
Thus, it is clear that there are two distinct equivalence points.
Explanation:
More is the mass of directly attached atom more will be the priority of the group attached to the alkyl or aryl chain.
Atomic mass of oxygen is 16, nitrogen is 14, carbon is 12, and hydrogen is 1.
This means that as the atomic mass of oxygen is greater than rest of the given atoms. So, priority will be given to the oxygen atom.
Thus, we can conclude that the given groups are placed in order of decreasing priority as follows.
-OH > > -COOH > -H