mixtures is not a possessive noun mixture's is a possessive noun (singular) mixtures' is a possessive noun (plural) I assume that "e" in your question is just a typo and should not be there. If it was intentional, I don't understand what it means.
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mixtures is not a possessive noun
mixture's is a possessive noun (singular)
mixtures' is a possessive noun (plural)
I assume that "e" in your question is just a typo and should not be there. If it was intentional, I don't understand what it means.