We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Check Writers' Offers

What's Your Topic?

Hire a Professional Writer Now

The input space is limited by 250 symbols

What's Your Deadline?

Choose 3 Hours or More.
Back
2/4 steps

How Many Pages?

Back
3/4 steps

Sign Up and Get Writers' Offers

"You must agree to out terms of services and privacy policy"
Back
Get Offer

Analysis of two Commercial Brands of Bleaching Solution

Paper type: Analysis
Pages: 2 (322 words)
Categories: Brands
Downloads: 18
Views: 283

Objective

To determine the concentrations of the active ingredients in 2 commercial bleaches.

Introduction

Sodium hypochlorite is usually found in bleaching solutions. It is the active ingredient of bleaching solutions. It bleaches by oxidation. When it is added to dye, the following reaction occurs:

ClO- + dye —————-> Cl- + (dye + O)

If the oxidized form of the dye is colorless, then the color of the dye would fade away.

In the presence of acid, the hypochlorite ions from the bleaching solution reacts with the iodine ions from potassium iodide in the following way:

ClO- + 2I- + 2H+ ———>I2 + H2O + Cl-

When sodium thiosulphate solution is added into this reacted solution, a further reaction occurs:

I2 + 2S2O32- ————–>2I- + S4O62-

This reaction could be used in titration to find out the number of moles of thiosulphate ions, thus the concentration of hypochlorite ions in the bleaching solution.

Procedure

1. 10 cm3 of Kao Bleach was pipette into a volumetric flask.

Distilled water was added until the meniscus reaches the graduation point.

2. 25 cm3 of the titrated bleach was pipette into a conical flask. About 10 cm3 of potassium iodide and dilute sulphuric acid was added into the conical flask.

3. The solution was titrated with sodium thiosulphate solution until the brown colour of the iodine fades.

4. Starch solution was added into the conical flask, and the solution was further titrated until the dark-brown colour of the starch-iodine complex turns to colourless. The volume of sodium thiosulphate solution required to reach the end point was recorded.

5. Steps 1 to 4 were repeated 3 more times.

6. Steps 1 to 5 were repeated using Clorox Bleach.

Data and Calculation

Molarity of standard Na2S2O3 solution = 0.05182M

Brand A: Kao

Price: $11.9/ 1500ml

Trial

1

2

3

Final reading/cm3

26.8

23.1

25.7

26.0

Initial reading/ cm3

4.1

0.4

2.9

3.2

Volume of Na2S2O3

22.7

22.7

22.8

22.8

Cite this essay

Analysis of two Commercial Brands of Bleaching Solution. (2017, Aug 11). Retrieved from https://studymoose.com/analysis-of-two-commercial-brands-of-bleaching-solution-2-essay

How to Avoid Plagiarism
  • Use multiple resourses when assembling your essay
  • Use Plagiarism Checker to double check your essay
  • Get help from professional writers when not sure you can do it yourself
  • Do not copy and paste free to download essays
Get plagiarism free essay

Not Finding What You Need?

Search for essay samples now

image

Your Answer is very helpful for Us
Thank you a lot!