1 equivalent of Ca2+ ion is equal to:
10 gram
20 gram
30 gram
40 gram
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.