What letter on the model titration curve corresponds to the point where ph equals the numerical value of pka for hpr? what speci
1 answer:
Letter C on the model titration curve corresponds to the point where pH equals the numerical value of pKa for HPr
<h3>What is a titration curve?</h3>A titration curve is a graph of the pH of a solution against increasing volumes of an acid or a base that is added to the solution.
The pH of a solution is the negative logarithm to base ten of the hydrogen ion concentration and is a measure of the acidity or alkalinity of the solution.
The pKa is the acid dissociation constant of an acid solution.
In a titration of a strong acid and strong base, the pH at equivalence point is equal to the pKa of the acid.
The equivalence point is the point when equal moles of acids and base has reacted.
In the given titration curve, pH = pKa at point C.
In conclusion, for a titration curve of strong acid and base, at equivalence point, pH is equal to pKa of acid.
Learn more about equivalence point at: brainly.com/question/23502649
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The question is incomplete, the complete question is:
When 177. g of alanine are dissolved in 800.0 g of a certain mystery liquid X, the freezing point of the solution is
lower than the freezing point of pure X. On the other hand, when 177.0 g of potassium bromide are dissolved in the same mass of X, the freezing point of the solution is
lower than the freezing point of pure X. Calculate the van't Hoff factor for potassium bromide in X.
<u>Answer:</u> The van't Hoff factor for potassium bromide in X is 1.63
<u>Explanation:</u>
Depression in the freezing point is defined as the difference between the freezing point of the pure solvent and the freezing point of the solution.
The expression for the calculation of depression in freezing point is:
OR
......(1)
- <u>When alanine is dissolved in mystery liquid X:</u>
i = Vant Hoff factor = 1 (for non-electrolytes)
= freezing point depression constant
= Given mass of solute (alanine) = 177. g
= Molar mass of solute (alanine) = 89 g/mol
= Mass of solvent = 800.0 g
Putting values in equation 1, we get:
- <u>When KBr is dissolved in mystery liquid X:</u>
i = Vant Hoff factor = ?
= freezing point depression constant =
= Given mass of solute (KBr) = 177. g
= Molar mass of solute (KBr) = 119 g/mol
= Mass of solvent = 800.0 g
Putting values in equation 1, we get:
Hence, the van't Hoff factor for potassium bromide in X is 1.63