Question

12.32.. The water molecule is partially ionic, in that an electron is partially transferred from each hydrogen to the oxygen, as indicated in Fig. 12.35, where q de- notes the magnitude of each of the two charges transferred. (a) Write down the electric dipole mo- ment p of the H2O molecule in terms of the charge g, the H-O bond length d, and the angle 0. (Note: e dipole moment of two charges q and -q a dis- tance d apart is a vector of magnitude qd pointing from the negative to the positive charge. Thus, H2O has two dipoles pi and P2 as shown, and the total moment is p p2.) (b) The measured values are p 6.46 X 10-30 C.m, d 0.0956 nm, and 6 104.5°. Find the magnitude q of the charge transferred and express it as a fraction of the electron charge e. Pi O (-24) ) θ P2 q )H FIGURE 12.35

Answer 1

a) 5, 5187x 1020 C = 2O 20 S. 19 . 3e oe 2..q 0.345 e So 5 345mas charge of electror う G.MGXIO 2 300 0.0456지09X 103 (52-R5)