Q:

How can pH be calculated from molarity?

A:

Quick Answer

To calculate pH from molarity, take the negative logarithm of the molarity of the aqueous solution similar to the following equation: pH = -log(molarity). pH is the measure of how acidic or basic a substance is, which refers to the concentration of hydrogen atoms that are present. Molarity is the concentration of a particular aqueous solution in moles, also known as Avogadro's number, per liter.

Continue Reading

Full Answer

An individual who already has the molarity of an aqueous solution can simply use a calculator with the molarity to determine what the pH of the solution. pH ranges from 0 to 14. A neutral pH, which is the pH of water, is 7.0 while a pH less than 7.0 is considered to be acidic. A pH above 7.0 is considered to be basic. Any solution that has a very acidic or basic pH is considered to be reactive, and will easily react with other molecules and elements found in various solution to produce different compounds.

The pH and pOH of an aqueous solution should equal to 14. This is to maintain the equilibrium of the ionization reactions that happen in the solution. In short, if the pH or the pOH of a solution is known, the other can be easily deduced through simple math.

Learn more about Acids & Bases

Related Questions

  • Q:

    How do you define "weak acid"?

    A:

    A weak acid is defined by its lower level of ionization with the surrounding solution than strong acids, meaning that it has a lower tendency to exchange protons. Examples of weak acids include ethanoic acid, carbonic acid, hydrogen fluoride and acetic acid.

    Full Answer >
    Filed Under:
  • Q:

    What is a buffer region?

    A:

    A buffer zone in chemistry is a region where the pH of a solution remains constant. In an acid-base titration of a weak acid with a strong base, the pH of the solution increases, levels off through the buffer zone and then increases quickly to reach the equivalence point.

    Full Answer >
    Filed Under:
  • Q:

    Is sodium carbonate a strong base?

    A:

    Sodium carbonate, also known as soda ash, forms a medium-strength base when in a solution of water. Depending on the amount of sodium carbonate in the solution, the pH can range from around 11.3 to 11.7.

    Full Answer >
    Filed Under:
  • Q:

    What is a solvent?

    A:

    A solvent is the substance into which another substance dissolves to form a solution. It is the largest part of the solution. Its counterpart, the solute, is the part that dissolves within the solvent.

    Full Answer >
    Filed Under:

Explore