1 equivalent of Ca2+ ion is equal to:
Correct Answer: 20 gram
Description: The concept of electrical equivalence is impoant in physiology because many of the solutes in the body are in the form of charged paicles. One equivalent (eq) is 1 mol of an ionized substance divided by its valence. One mole of NaCl dissociates into 1 eq of Na+ and 1 eq of Cl-. One equivalent of Na+ = 23 g, but 1 eq of Ca2+ = 40 g/2 = 20 g. The milliequivalent (meq) is 1/1000 of 1 eq. Ref: Ganong's Review of Medical Physiology 23rd edition, Chapter 1.
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