Thiol reagents, such as 1,4-dithiothreitol (dtt), are often added to the solutions of such proteins to protect them from this reaction and to reverse it when it occurs. (the reverse reaction works best at slightly alkaline ph.) draw the product formed when dtt reacts with a protein disulfide bond to liberate the free thiol groups.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

c (diamond),

sio2 (quartz)