Phosphoric acid is a triprotic acid (Ka1=6.9×10−3 M, Ka2=6.2×10−8 M, and Ka3=4.8×10−13 M) . To find the pH of a buffer composed of H2PO−4(aq) and HPO2−4(aq) , which pKa value would you use in the Henderson–Hasselbalch equation? pKa1=2.16 pKa2=7.21 pKa3=12.32 Calculate the pH of a buffer solution obtained by dissolving 16.0 g KH2PO4(s) and 27.0 g Na2HPO4(s) in water and then diluting to 1.00 L.

diaria maybe go see a doctor about that

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.