Is there any method to separate two kinds of powder without any modifications to the powder?

 

Food and baking soda
 

   
What is the solvent for 
plastic bottle (PET) recycling?
  
 

 
Does silver, which is used as 
an antibacterial agent, 
make a precipitation 
with chloride ion in tap water?

   
Chemical reaction for 
bleaching denim
 

  
Why do diamonds 
have many colors?
   

  
Does water freeze at 1 C° 
when there is wind?
  

 
Why are living creatures 
made of carbon atoms?
 

  
The difference between anionic and nonionic surfactant, and its application to detergent

  
What is contained 
in auto emissions?
  

 
Can a metal become a gas?
 

Is there any pen which can resist both water and alcohol?

  
Why is it prohibited to 
warm up metal by microwave?
 

The volume was decreased 
when a substance was dissolved
 in water.  Why?

  
How are denatured proteins
 in pasteurized milk treated?

Why is it better not to over-stir eggs before cooking them?

    
How much will salt be 
dissolved in organic solvent?
  

  
Why does a glue stick have adhesive force, even though 
it is not sticky?

Iron oxides in cosmetics
 

 
Salted boiled eggs 
 

   
Why do air conditioners 
and refrigerators leak Freon 
(chlorofluorocarbon)?

 
Why does the water boil
 below 100 °C?
 

 
What will be left after 
tap water is evaporate?

Heat resistance of glass
 against lasers

 
What is acid rain? 
What can we do about it?
 

  
Why is it so dangerous 
to mix chlorine bleach 
with acidic cleaner?