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Describe the structure of alginate
The commercially available alginates are white to cream coloured powders. 1% alginic acid solution gives a pH value of 2.9 while it is 2.3 and 7.5 for 1% solutions of propylene glycol and sodium alginate respectively. Alginic acid is essentially insoluble in cold or hot water, but it does swell quite strongly. Alginic acid salts (K, Na, NH4+ Ca, and Na+ Ca) and propylene glycol alginates are soluble in cold or hot water and form stable solutions. The major properties of alginate include pH, solubility and viscosity.
What is the reason behind the high surface tension of water?
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