Which type of reaction is c12 h22 o11. 12c+ 11h2o

   C12H22O11→12C +11 H2O

The type  of reaction  above is a decomposition reaction.

Explanation

A  decomposition reaction is  type  of reaction  that involve breaking down  compound into smaller  compounds  or individual  element.

Decomposition   reaction  mostly requires   energy  in  form  of heat  which break  down  compound.

C12H22O11  is  breakdown down  into 12 C   and 11 H2O  therefore  the  reaction above  is a  decomposition reaction.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error