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The oil/water interfacial tension and contact angle for an oil-water-solid system are 30 dynes/cm and 60°....

The oil/water interfacial tension and contact angle for an oil-water-solid system are 30 dynes/cm and 60°. How much Super XX water-soluble surfactant would be required to make the system fully water wet if each part per million (ppm) of Super XX reduces the specific surface free energy between water and the solid by 2 dynes/cm, the oil/water interfacial tension by 4 dynes/cm but does not alter the specific surface energy between the oil and the solid?
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