**Using the lab manual and provided excel data, calculate the chloride concentration in the unknown solution, seawater solution, and answer all supplementary questions. **

**Attach all neatly completed math, both sigmoidal/derrivative graphs, and tables.**

0.6955

0.8057

**What is the function of salt bridge?**

**Why do we need to try NaCl in an oven at a temperature above 125**^{o}C for 2 hours?

**2. Please write the half reactions and their corresponding Nernst equations. **

**Why do we need the first derivative curve to calculate the equivalence point?**

**What other methods you could be used to determine the chloride concentration in an unknown solution?**