3. A is a laboratory method used to determine the
concentration of an acid or a in solution by performing a reaction with a standard solution. 4. At the of the titration, the indicator changes color, which
indicates neutralization. Once neutralized, moles of and moles of are equal. 5. In a titration of HCl with NaOH, 100.0 mL of the base was required to
neutralize 20.0 mL of 5.0 M HCl. What is the molarity of the NaOH? (Be sure to write the neutralization reaction.)

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.

Aquantity of that isotope to decay to 1/2 of  its original value

Ineed a picture or something 

Electrons are evenly distributed in the water molecule.