Type your question here show all steps of the derivation with qualifying text; u

ID: 792007 • Letter: T

Question

Type your question here

show all steps of the derivation with qualifying text; use symbols

exactly as defined in the problem; algebraic equation must not incorporate

units;

all subsections must be clearly identified, or the answer will be

disqualified

Let W mg be the mass of the unknown sample. Let M

B molar be the

concentration of the sodium hydroxide titrant and V

ep mL be the endpoint

volume of the titration.

(a) State an expression for the number of mmols of sodium hydroxide used in

the titration in terms of M

B and Vep.

(b) Write the balanced stoichiometric equation for the neutralization of KHP

with sodium hydroxide. State the equivalence point mole ratio between

KHP and sodium hydroxide. Give an expression for the number of mmols

of KHP titrated by the sodium hydroxide in terms of M

B and Vep.

B, Vep and

relevant constant values.

(d) Derive

(22) an expression for the weight percent of KHP in the sample in

terms of W, M

B, Vep and the associated constant values (which must be

expressed as numerals

(23) and not symbols). Hence, obtain an expression

for the analytical result (weight percent KHP) in terms of M

B and the ratio

ep/W).

(e) Based

exclusively on the derived expression,

KHP(aq) + NaOH(aq) --> H2O(l) + KNap(aq)

or

KHC8H4O4(aq) + NaOH(aq) ? KNaC8H4O4(aq) + H2O(l)

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