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Unformatted text preview: Negligible. Extremely viscous. Cannot stir, but rather swirl. Big glob on end of rod. If asked to rank the viscosity on a scale of 1-10: Water: 0 Water + PVA: 2 Water + PVA + Borax: 6 Water + PVA + Borax + H 2 S0 4 : 5 Water + PVA + Borax + H 2 S0 4 + NaOH: 9 Conclusion : This lab demonstrated that cross linking increases the viscosity of a polymer solution. The removal of cross linking by the addition of a known amount of acid, which decreasing the viscosity, does not completely restore the solution to its previous viscosity. Finally, the neutralization of the added acid does restore, if not increase, the viscosity of the solution. 2...
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