# PH of a mixed solution: is this right?

• N_L_
In summary, the final pH of a solution obtained by mixing 200 ml of 0.400 M NH3 with 300 ml of 0.100 M HCl is 9.68. This was determined using an ICE table. Alternatively, if there is excess HCl, the pH equation can be used, and if the base is in excess, the Kb equation can be used to determine the pH. Two ICE tables can also be used in this case, with the first going in one direction and the second going back in the other direction.
N_L_

## Homework Statement

What is the final pH of a solution obtained by mixing 200 ml of 0.400 M NH3 with 300 ml of 0.100 M HCl? (Kb = 1.8 x 10^-5)

## The Attempt at a Solution

I used an ICE table and came up with 9.68. Is that correct?

Should I have used two ICE tables instead of one? The first in the one direction and the second going back in the other direction?

Last edited:
hint: the first reactions is that with NH3 and HCl, if you have excess HCl, then you can simply use the pH equation (pH= -log[H3O+]) to find the resulting pH, if the base is the excess, then the Kb equation is going to be used to determine the [OH-] concentration, and eventually the pH.

Thank you.

## What is the pH of a mixed solution?

The pH of a mixed solution is a measure of its acidity or basicity. It is a numerical scale ranging from 0 to 14, with 7 being considered neutral. A pH lower than 7 indicates acidity, while a pH higher than 7 indicates basicity.

## How is the pH of a mixed solution calculated?

The pH of a mixed solution is typically calculated by measuring the concentration of hydrogen ions (H+) in the solution. This can be done using a pH meter or through a chemical titration process. The higher the concentration of H+ ions, the lower the pH will be.

## What factors can affect the pH of a mixed solution?

The pH of a mixed solution can be affected by a variety of factors, including the types and concentrations of the substances mixed together, temperature, pressure, and the presence of other chemicals or ions that can react with the solution.

## Why is it important to know the pH of a mixed solution?

The pH of a mixed solution is important because it can have a significant impact on the chemical and biological processes that occur within the solution. It can also affect the properties and behavior of substances dissolved in the solution.

## Can the pH of a mixed solution change over time?

Yes, the pH of a mixed solution can change over time due to various factors such as chemical reactions, evaporation, and exposure to air. It is important to regularly monitor and adjust the pH of a mixed solution to maintain its desired properties and prevent any negative effects.

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