1. Calculate the molar masses of the reactants KHP and NaOH in the following neu

ID: 820354 • Letter: 1

Question

1. Calculate the molar masses of the reactants KHP and NaOH in the following neutralization

reaction:

NaOH (aq) + KHC8H4O4(aq) ? NaKC8H4O4(aq) + H2O(l)

2. The prep lab has provided us with a large volume of approximately 1M NaOH, calculate the

volume of 1 M sodium hydroxide solution needed to prepare 250 mL of a 0.10 M solution.

3. Write out a detailed procedure for preparing the solution described in the above question. You

need to specify the laboratory instruments and glassware you will use.

4. Calculate the mass of KHP, which will be needed to neutralize 25 mL of the base solution,

0.10M NaOH.

5. With the above information explain exactly how you will perform this titration. Your

explanation should include the calculations showing how much KHP should be weighed out as well

as a description of the procedure including all glassware. Assume that approximately 25 mL of

sodium hydroxide solution should be used.

1) Molar mass of KHP = 204.2

molar mass of NaOH = 40

2) Moles of NaOH = 0.25 x 0.1 = 0.025 moles

Volume of 1 M NaOH required

Molarity = moles/vol

=> vol = moles / Molarity = 0.025 / 1 = 0.025 liters = 25 mL of 1 M NaOH required

3) Add 25 mL of 1 M NaOH solution to a flask using a pipette. then add 225 mL of water to it using a burette. The solution is prepared

4) Moles of NaOH = 0.025 x 0.1 = 0.0025 moles

Moles of KHP required = 0.0025

=> Mass of KHP required = 0.0025 x 204.2 = 0.5105 g

5) Put 25 mL of 0.1 M NaOH in a flask with the help of a pipette or burette. Add 0.5105 g of KHP to it in an interval of 0.1 g.

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