1 / 10

Understanding the Power of pH in Water Chemistry

Learn about the significance of pH in water chemistry, the characteristics of acids and bases, examples of common acids and bases, and how the pH scale works. Understand the fundamentals behind the acidity and alkalinity of solutions.

takoda
Télécharger la présentation

Understanding the Power of pH in Water Chemistry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. pH “Power of Hydrogen”

  2. Water and pH • Acids: When poured into water, it gives up H (hydrogen) to the water. • Bases: When a base is poured into water, it gives up OH (hydroxide) to the water

  3. For Example….. Acids -When hydrochloric acid (HCl) mixes with water, it separates into positive hydrogen (H+) and negative chlorine (Cl-). H+ = ACID

  4. Characteristics of Acids:Acids taste sourAcids react strongly with metals (Zn + HCl)Strong Acids are dangerous and can burn your skin • Examples of Acids:1. Vinegar 2. Stomach Acid (HCl)3. Citrus Fruits

  5. Bases When the base sodium hydroxide/ (NaOH) “Bleach” mixes with water, it separates into positive sodium (Na+) and negative hydroxide (OH-). OH- = Base What must Neutral mean?

  6. Solutions containing bases are often called alkaline • Characteristics of Bases:Bases taste bitterBases feel slipperyStrong bases are very dangerous and can burn your skin • Examples:1. lye (Sodium Hydroxide)2. Ammonia

  7. pH Scale Runs from 0-14 0-6 is an ACID 8-14 is a BASE 7 is NUETRAL

  8. Where do the numbers come from? • The pH scale is logarithmic • One unit change in pH is a 10-fold change pH = - log [H+] • If [H+] = 1 X 10 -7, the negative log of [H+] = 7, therefore pH=7

More Related