What is the role of an indicator in an acid-base titration?

1. What is the role of an indicator in an acid-base titration?  Identify how an appropriate indicator is chosen and use terms "end point" and "equivalence point" of how an indicator works.

 2.Using the half-reaction method, balance the following redox reaction occurring in acidic solution: NO3- + I2  →  IO3- + NO2

3.Uranium-234 is unstable and undergoes two subsequent alpha emissions. What is the resulting nuclide from this transformation?

4.Match the appropriate name for each chemical reaction description provided.

A + B →  AB

ABC  →  AB + C

XY + Z →  Y + XZ

CH4 + 2O2 →   2H2O + CO2

HNO3 (aq)+ LiOH (aq)→ H2O (l)+ LiNO3(aq)

2KI (aq) + Pb(NO3)2 (aq)  →  2KNO3 (aq) + PbI2 (s)

A.Combustion

B.Synthesis

C.Single-replacement

D.Neutralization double-replacement

E.Decomposition

F.Precipitation double-replacement

5.Match the appropriate name for particle shown below.

42He

11H

00γ

0-1β

01e

10n

A.Beta particle

B.Proton

C.Gamma photon

D.Alpha particle

E.Positron

F.Neutron