I need the answer for 1,2,3,4 and 5 type it please STANDARDIZATION OF A SODIUM H

Question

I need the answer for 1,2,3,4 and 5
type it please

STANDARDIZATION OF A SODIUM HYDROXIDE SOLUTION DATE 1. What is the purpose of this experiment? 2. A sample of KHP has a mass of 2.345 g is used for a titration, how many moles of KHP is this sample? 3. How many moles of NaOH would be needed to reach the endpoint of this titration with sample of KHP from the previous question? 4. If the initial volume of the NaOH in the burette was 0.50 mL and the final volume is shown to the right, what is the volume of NaOH used in this titration? 5. What is the concentration of the NaOH solution used in this titration? EXPERIMENT 10 153

Explanation / Answer

Question 1

The purpose of this experiment to determine the concentration of NaOH

Question 2

Molar mass of KHP = 204.22 gm/mol

Moles of KHP from 2.345 gm = 2.345 g / 204.22 gm/mol = 0.01148 Moles

Question 3

Balanced equation:
NaOH(aq) + KHC8H4O4(aq) ====> KNaC8H4O4(aq) + H2O(l)
Reaction type: double replacement

According to the above equation one mole of KHP will neutalize one mole of NaOH. Hence

Moles of NaOH needed = 0.01148 Moles

Question 4

Volume of NaOH used in the titration = 18.78 - 0.5 = 18.28 ml

Question 5

Concentration of NaOH = 0.01148 x 1000 / 18.28 = 0.6281 M

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