BUT DE L'EXPERIMENTATION
Creating
a foam structure from the chemical reaction
HYPOTHÈSES
-
difference examination between dry yeast and baking powder
- propotion
examination of hydrogen peroxide
- the influence of warm
water on dry yeast
INTUITION
We
suppose that the chemical reaction will develop some gas and some bubble
structure.
EXPÉRIENCE
A We mixed 15 g of baking powder with 3 table spoon
of warm water. We prepared a bottle with ¼ cup of hydrogen peroxide and ¾ cup
of water and added liquid and food colorant. Then we put baking powder mixture
into the bottle.
B We mixed 15 g of baking
powder with 3 table spoon of warm water. We prepared a bottle with ½ cup of
hydrogen peroxide and ½ cup of water and
added liquid and food colorant. Then we put baking powder mixture into the
bottle.
C We mixed 15 g of dry yeast
with 3 table spoon of warm water. We prepared a bottle with ½ cup of hydrogen
peroxide and ½ cup of water and added
liquid and food colorant. Then we put dry yeast mixture into the bottle.
D We mixed 25 g of dry yeast
with 1 table spoon of warm water. We prepared a bottle with 1 cup of hydrogen
peroxide and added liquid and food colorant. Then we put dry yeast mixture into
the bottle.
MESURES ET
OBSERVATIONS
A / B Baking powder react with water, it
sparkled. After adding the water mixture into the bottle, only a little bit of
foam has created. During one minute the reaction has stopped.
C Dry yeast
with water contact changed from powder to liquid and a little bit of
plasticine. After adding the water mixture into the bottle the foam started to
create and went out of the bottle. The reaction last about 4 min.
D Dry yeast
with water contact changed from powder to plasticine and a little bit of
liquid. After adding the mixture into the bottle the foam started to create and
went out of the bottle. The reaction last about 5 min
ANALYSE
- baking
powder didn’t react with hydrogen peroxide
- the more
dry yeast we put the more foam we obtained
- the foam
structure disappear during 15 min
CONCLUSIONS
The obtained structure wasn’t solid, it
disappeared very quickly. It has produced a little bit of gas without smell. It
would be interesting to put a balloon onto the bottle orifice to see if the
hydrogen fill the balloon with gas. We would do it as further experiment.
