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Ion X is negatively charged and more concentrated inside than outside the membrane potential of a cell therefore Ex (equilibrium) is positive. Ion X is unknown. Why is the equilibrium positive?

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closed as off-topic by Bryan Krause, theforestecologist, David, canadianer, another 'Homo sapien' May 5 '17 at 7:07

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Homework questions are off-topic on Biology unless you have shown your attempt at an answer. For more information see our homework policy." – theforestecologist, David, canadianer
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