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science gizmo expanding cubes

SCIENCE GIZMOS: Expanding Cubes | Pack of 100 | Excellent scientific demonstration

$ 7.90 excl. GST

Science Gizmos.

Grow expanding gel like cubes. 100 cubes supplied.

Super absorbent polymers absorb large volumes of water when placed in water and are turned into hydrogels.
The volume change can be an incredible 250x of the original volume and is fully reversible.
The gelled polymer contains up to 98% water so it has the same optical density as water and becomes invisible in water. Can be coloured by added food dye.

Uniquely, this Science Gizmo is fun and easy to use.
See how to demonstrate the properties, mechanics and applications used and taught in Physics and Chemistry labs.

In stock (can be backordered)

SKU: PBSM47 Categories: , Brand:

Description

Science Gizmos.

Uniquely, this Science Gizmo is fun and easy to use.
See how to demonstrate the properties, mechanics and applications used and taught in Physics and Chemistry labs.

[Wikipedia excerpt:  ‘…Superabsorbent polymer (SAP) (also called slush powder) can absorb and retain extremely large amounts of a liquid relative to its own mass. Water-absorbing polymers, which are classified as hydrogels when mixed,[2] absorb aqueous solutions through hydrogen bonding with water molecules. A SAP’s ability to absorb water depends on the ionic concentration of the aqueous solution. In deionized and distilled water, a SAP may absorb 300 times its weight[3] (from 30 to 60 times its own volume) and can become up to 99.9% liquid, but when put into a 0.9% saline solution, the absorbency drops to approximately 50 times its weight.[citation needed] The presence of valence cations in the solution impedes the polymer’s ability to bond with the water molecule.….’ ].

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Wikipedia info

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