# If 990 ml of water is added to 100 ml of 010 m HCl what is the ph of the resultant solution

## Introduction

In order to calculate the pH of a solution, you need to know the concentration of the acid or base in the solution. The concentration is usually expressed in terms of molarity (moles per litre). To calculate the pH of a solution, you also need to know the volume of the solution. For example, if you have a 1 liter (L) solution that contains 0.1 moles of hydrochloric acid (HCl), the concentration would be 0.1 molars (M) and the volume would be 1 liter.

To calculate the pH of the resultant solution, you first need to calculate the concentrations of both acids and bases in the solution. The concentration of hydrochloric acid is 0.1 M and the concentration of water is 1 M. The sum of these two concentrations is 1.1 M.

The pH of a solution is calculated using the formula:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in the solution.

Using this formula, we can calculate that the pH of our 1 L solution containing 0.1 moles HCl and 1 mole water is:

pH = -log[(0.1 mol/L) + (1 mol/L)]
= -log(1.1 mol/L)
= -log(1.1)
= 0.045

## What is pH?

pH is a measure of how acid or alkaline a substance is. pH values range from 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most alkaline. In general, substances with a pH below 7 are considered acids, while those with a pH above 7 are considered bases.

## The Acid-Base Reaction

The acid-base reaction is a type of chemical reaction that occurs when an acid and a base interact with each other. The acid-base reaction produces a new compound, called a salt, and water.

In this reaction, the hydrogen ions from the acid combine with the hydroxide ions from the base to form water molecules. The remaining ions from the acid and base combine to form the salt.

The acid-base reaction is a reversible reaction. This means that the products of the reaction can be converted back into the reactants. The forward and reverse reactions can occur at the same time, but one will happen more quickly than the other.

## The Effect of Water on pH

The addition of water to an acid or base will change the pH of the solution. The general rule is that adding water to an acid will decrease the pH, while adding water to a base will increase the pH. This is due to the fact that adding water to an acid or base will change the concentration of ions in solution, which in turn affects the pH.

In the case of adding water to hydrochloric acid (HCl), the addition of water will reduce the concentration of H+ ions in solution, which will in turn raise the pH. The final pH of the solution will depend on the ratio of HCl to water added. If 990 mL of water is added to 100 mL of 010 M HCl, then the ratio of HCl to water is 1:10. This means that for every 1 mole (mmol) of HCl present, there are 10 moles (mmoles) of water. Therefore, the final concentration of H+ ions in solution will be 0.01 M (1 mmol/L). The resulting pH of the solution will be 2.

## The pH of the Resultant Solution

The pH of the resultant solution will be 2.

## Conclusion

The answer is that the pH of the resulting solution will be 1.