Standardization of Unknown Concentration Sodium Hydroxide Lab Report

Experiment – Standardization of an Unknown Concentration Sodium

Hydroxide Solution and the Determination of the Molecular Mass of an

Unknown Acid

Directions: To complete the experiment, read the laboratory experiment in the manual, watch the video below, and complete the data table below.

The experimental report must be submitted to the appropriate Blackboard assignment folder.

Reading Assignment: Standardization of Unknown Concentration

 

Experimental Videos: Standardization of Unknown Concentration of Sodium Hydroxide Solution

 

https://youtu.be/zOcduvKFh3U

 

 

Simulated Data:

Complete the data table. Remember Significant figures

Part 1A. Determining the concentration of an unknown NaOH solution using KHP (use data from video for this part)

 

Trail 1

Trail 2

Trail 3

Mass of KHP used (g)

 

 

 

Moles of KHP (mol)

 

 

 

Initial Buret Reading (mL)

 

 

 

Final Burret Reading (mL)

 

 

 

Volume NaOH used (mL)

 

 

 

Moles of NaOH used (mol)

 

 

 

Molarity of NaOH (M)

 

 

 

Average molarity of NaOH

 

 

 

 

 

 

Standard Deviation

 

RSD (%)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part 2. Determining the molar mass of an unknown acid

 

Trail 1

Trail 2

Trail 3

Uknown Number/Letter

4

4

4

Mass of unknown acid used (g)

0.201

0.202

0.2

Initial Buret Reading (mL)

1.00

0.10

0.00

Final Burret Reading (mL)

35.30

39.60

34.00

Volume NaOH used (mL)

 

 

 

Moles of NaOH used (mol)

 

 

 

Moles of unknown acid (mol)

 

 

 

Molar mass of unknown acid (g/mol)

 

 

 

Average molar mass (g/mol)

 

 

 

 

 

 

Standard Deviation

 

RSD (%)

 

 

Post Lab Questions

  1. Answer only questions 6 from the lab manual.
  2. What is the purpose of a scout titration?
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