# Determining Cl- and Ag+ Concentrations in A Solution

• cloveryeah
In summary, the conversation discusses an experiment to determine the concentration of Cl- in an aqueous solution of KCl and the Ksp of AgCl. The experiment involved creating a galvanic cell and adding AgNO3 to the solution. The resulting emf of the cell and the concentrations of Ag+ and Cl- in the solution were to be calculated. The suggested method was to use the equation (mole added)/[total volume] to calculate [Ag+] and (mole remained after reaction)/[total volume] to calculate [Cl-], but there may be additional information needed for a more accurate calculation.
cloveryeah

## Homework Statement

A is an aqueous solution of KCl(aq) with unknown concentration. The
following experiment was carried out at 25°C to determine the concentration
of Cl- (aq) in A, and the Ksp of AgCl(s)

Step 1: A half-cell was made by dipping a silver strip into 100.0 cm3
of A.

Step 2: A galvanic cell was constructed by connecting the half-cell made in
Step 1 to a standard Zn2+(aq)  Zn(s) half-cell with a suitable salt bridge.

Step 3: 0.100 M of AgNO3(aq) was added in portions from a burette to A. After
each addition of AgNO3(aq), the emf of the galvanic cell was measured.

When 8.0 cm3
of AgNO3(aq) had been added to A, what is the cell emf
(E) and the concentration of Ag+(aq) and Cl-
(aq) in the resultant solution?

[/B]

## The Attempt at a Solution

i just simply cal the [Ag+] added to the solution and by (mole added)/[total volume (108cm3)]
and [Cl-] by (mole remained after reaction)/[total volume(108cm3)]
is it correct? or need other specific equation to cal this problem?

## 1. How do I determine the concentration of Cl- and Ag+ in a solution?

To determine the concentration of Cl- and Ag+ in a solution, you can use a technique called titration. This involves adding a known amount of a substance (called a titrant) to the solution until a reaction occurs. By measuring the volume of titrant needed to cause a reaction, you can calculate the concentration of Cl- and Ag+ in the solution.

## 2. What equipment do I need for determining Cl- and Ag+ concentrations in a solution?

To determine Cl- and Ag+ concentrations in a solution, you will need a burette, a pipette, a beaker, a magnetic stir bar, a magnetic stir plate, and solutions of known concentrations of Cl- and Ag+. You will also need an indicator, such as silver nitrate, to detect the presence of Cl- and Ag+ ions in the solution.

## 3. Can I use any indicator for determining Cl- and Ag+ concentrations in a solution?

No, not all indicators are suitable for determining Cl- and Ag+ concentrations in a solution. You will need to use an indicator that specifically reacts with Cl- and Ag+ ions, such as silver nitrate. Using the wrong indicator can lead to inaccurate results.

## 4. How do I calculate the concentration of Cl- and Ag+ in a solution using titration?

To calculate the concentration of Cl- and Ag+ in a solution, you will need to know the volume of titrant used, the molarity of the titrant, and the stoichiometry of the reaction. By using these values in a simple formula, you can determine the concentration of Cl- and Ag+ in the solution.

## 5. Why is it important to determine Cl- and Ag+ concentrations in a solution?

Determining Cl- and Ag+ concentrations in a solution is important for several reasons. It can help identify the purity of a substance, determine the effectiveness of a chemical reaction, and ensure the safety of a solution. It is also a crucial step in many scientific experiments and processes.

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