Question

Quiz Material:

Review how to use a pipet in the glassware handout

What is the stoichiometric ratio of NaOH to KHP using the equation below?

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

Base Acid (KHP) Salt​   Water

Using the equation above:

0.0321 Moles of NaOH = _______Moles of H8C4O4

If I use 0.025 moles of NaOH to neutralize the KHP,

how many moles of KHP are there?

Calculate the molar mass of KHC8H4O4 (KHP).

What is the Equivalence Point?

What indicator will be used in this experiment?

What color is the indicator in an acid solution?

If the initial buret reading is 0.50 ml and the final burette reading is at 30.50 mL, what is the volume of NaOH delivered?

Answer 1

Quiz Material:

What is the stoichiometric ratio of NaOH to KHP using the equation below?

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

Base Acid (KHP) Salt​   Water

The stoichimetric ratio is 1:1

Using the equation above:

0.0321 Moles of NaOH = _0.0321/2 = 0.016__Moles of C8H6O4 (phthalic acid is a diprotic acid)

If I use 0.025 moles of NaOH to neutralize the KHP, how many moles of KHP are there?

0.025 moles will neutralize it

Calculate the molar mass of KHC8H4O4 (KHP).

Molar mass of KHP = (39 +1 +8*12+4+4*16) g/mol =204 g/mol

What is the Equivalence Point?

The point when an acid or a base is completely neutralized by a base or an acid, after adding equivalent quantity of acid or base is called the equivalence point.

What indicator will be used in this experiment?

Phenolphthalein can be used.

What color is the indicator in an acid solution?

It is colorless in acidic solution but purple in basic solution.

If the initial buret reading is 0.50 ml and the final burette reading is at 30.50 mL, what is the volume of NaOH delivered?

(30.50-0.50 ) ml = 30 ml NaOH was actually added.