redox. reactions

Chlorine + —— = sodium —— + ——- chlorate + water

Chlorine + cold dilute sodium hydroxide = sodium chloride +sodium chlorate + water

What are all the format of halate ions

What is the oxidation number of halogen atoms in halate salts

+1

What is the ionic equation for chlorine+sodium hydroxide

What are the observations for the reaction of chlorine and sodium hydroxide and how is it a redox reaction

Yellow green gas forms a colourless solution

Redox reaction

• chlorine oxidised from cl2 to NaClO

• Reduced cl2 - NaCl

What is a solution containing sodium chlorate used as

BLEACH

Sodium chlorate kills bacteria (Cl-)

Chlorate ions = bleaching (CLO-)

What is the equation for chlorine + water

What is hypochlorus acid used for? How do you relate this to the reversible reaction

Chloric acid is responsible for strong germicidal and bleaching power of wet chlorine

As HCLO kills microorganisms the p.o.e moves from left to right which makes there to be very little chlorine remains once HCLO has done its job

What is the reaction of chlorine and water in bright sunlight

UV breaks HCLO into HCL and o2

How does society assess whether the chemicals should be added to water supplies

They asses te advantages and disadvantages

Benefits of using chlorine in water treatment outweigh its toxic effects

What may be added to drinking water

Sodium fluroride

Helps strengthen enamel which helps prevent tooth decay but some object and say there could be risks

Chlorine sterilises water in pools and drinking water