For the environment

anhydrous copper (II) sulfate ( white --> blue) anhydrous cobalt (II) chloride ( blue --> pink)

sharp bp 100Cn mp 0C point

-chlorination (kill microorganism)

• filtration ( to remove insoluble salt)
• carbon (to remove taste and odours)

<p>N2 - 78% O2 - 21% =99%</p> Signup and view all the answers

<p>methane CH4</p> Signup and view all the answers

<p>N2 - fractional distillation liquid air H2 - cracking of hydrocarbon 02 - fractional distillation liquid air</p> Signup and view all the answers

<p>nitrogen potassium phosphorus</p> Signup and view all the answers