ES 5

Question 1

What are the risks of chlorine?

Answer 1

• Toxic gas
• iritates eyes, skin and respiratory system

Question 2

How to determine the concentration of sodium chlorite in bleach

Answer 2

• Convert all cm3 readings to dm3 (/1000)
  -Write down the ionic equations for the titration
• calculate moles of sodium thiosulfate (conc x vol)
• calculate moles of iodine
• calculate moles of chlorite ions
• calculate conc of chlorate ions