Question #68168

1 Answer
Apr 11, 2017

Answer:

Could be anything, like magnesium powder added to dilute acid, or many others.

Explanation:

My bet though, would be on a relatively strong hydrogen peroxide solution #H_2O_2(aq)#, to which manganese dioxide #MnO_2# was added. The #MnO_2# acts as a catalyst for the following reaction:

#2H_2O_2(aq)->2H_2O(l)+O_2(g)#

If you want to make sure you could test for the gas being oxygen (glowing splinter).