Science InvestigationCoke and Mentos Experiment

3C 2 Chris Chan3C 3 Gavyn Chen3C 14 Justin Lai3C 15 Edwin Lam3C 26 Brian Tsang

Aim

•To find out and compare the effect of Mentos with Coke, Coke zero and Sprite.

Hypothesis

• The Mentos will cause an explosion due to the reaction of the ingredients.

• Coke will have the least amount left because of the loss during the explosion.

Variables Table

Controlled variables

Same amount liquid of Coke, zero Coke and Sprite (500ml)Same temperature of liquidSame amount of Mentos ( 3 Mentos each)

Independent variable

Type of soft drinks put with Mentos.

Dependent variable

The loss of the liquid caused by the explosion with mentos and soft drinks.

Experiment

• Step 1: Prepare bottles of soft drinks. Coke, Zero Coke and Sprite (500 ml).

• Step 2: Prepare 3 mentos.

• Step 3: put the 3 mentos into the soft drink and measure the loss of liquid.

Coke

• Step 4: repeat the steps for zero Coke and Sprite. Zero Coke

• Step 4: repeat the steps for zero Coke and Sprite. Sprite

• Step 5: Compare and measure the amount of each soft drinks left.

ResultsSoft Drinks Coke Sprite Zero Coke

Amount Left 244 ml 382 ml 422 ml

Conclusion

• The amount of coke left is the less, which proves our hypothesis is correct.• This is because of the carbon dioxide pumped in when

bottle the drink in factory. • Mentos candy are covered with tiny dimples, when

dropping mentos, the surface tension of the liquid breaks and allows bubbles to form with greater amount of Carbon dioxide.• Coke has the greater amount of CO2, when more

bubbles are produced from coke, the bubbles (coke) was split out and cause loosing of liquid.

Source

http://www.scienceky.co./experiment/cokementos.html

http://www.exscience.co/e/soft_drinks_mentos.com.html