A highly advanced "multiple emulsion" is denoted by the notation w/o/w (water-in-oil-in-water). In a — Surface Chemistry Chemistry Question

💡 Solution & Explanation

A w/o/w multiple emulsion consists of an innermost water droplet dispersed entirely inside an intermediate oil droplet, which is itself dispersed entirely within an outer continuous water medium. Interface 1 exists strictly between the innermost water and the surrounding intermediate oil. Interface 2 exists strictly between the intermediate oil and the outermost continuous water. Thus, there are exactly 2 interfaces.