1. ion selectivity in voltage gated channels depends on the hydration status of the ion. what is the basis of k+ selectivity in voltage gated k+ channels? a. k+ is repelled by positive charges in the channel pore b. a k+ ion that is not hydrated is stabilized at the outside of the pore and then loses a neutron to allow it to pass

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when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.