DarinaVrublevskaya
Observations
TRIAL ONE
TRIAL TWO
BALL REST
Does not maintain its shape
Maintains its shape
BALL BOUNCE
Does not bounce and sticks onto the desk
Does bounce, about 15 cm up
THIN STRIP
The strip pulls off and falls
The strip holds together
PULL ENDS SLOWLY
Falls apart
Gluepstretches far
PULL ENDS QUICKLY
Falls apart
Snaps into two
Questions
In glue the tangled molecules make glue thick and viscous rather than thin and runny. When glue is exposed to air, the water evaporates, leaving the tangled polymer molecules. The tangled molecules stick to the surfaces on which they dried, and hold the surfaces together.Boraxhas ionscan form links between the long, thin polymer molecules in the gluewhich makesGluepmore like a solid than the plain liquid glue.It allowsholdingits shape for a short time, and as long as it is not strained. WhenGlueprests, the flexible network gradually relaxes, and theGluepflattens. WhenGluepis stretched quickly, the links between molecules break, and theGluepsnaps apart into pieces.Gluepcontains a lot of waterthat contributesto the liquid-like properties toGluep. If theGluepis left exposed to open air, the water will evaporate, and theGluepwill gradually stiffen.
Altering the materials affected the consistency of theGluepball because each substance that was added into the mixture had different types of ions which made the texture different, and theGluepball act differently too. This is all linked to stoichiometry because it is the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers. In this experiment, we compared substances and have observed different types of reactions to them.
Works Cited
FLINN Scientific Canada.(2013).Glue Slime.Retrieved from
https://www.flinnsci.ca/glue-slime/dc91643/
SciFun.(2014).Gluep- Solid or Liquid?Retrieved from
http://scifun.chem.wisc.edu/HomeExpts/gluep.htm
