{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chemistry160-page14 - -7 of a volume of water will be...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry Concepts - 14 Some special properties of water: Acids, Bases, Salts and Buffers Recall that ionic bonds dissociate in solution forming ions, but covalent compounds resist dissociation. This is essentially true. However, some polar covalent compounds, including water, do dissociate, and it is important to discuss the meaning of this as it relates to living organisms, and their chemical environment. A molecule of water is formed by the bonding of 1 oxygen with 2 hydrogen atoms. Oxygen has a very high electronegativity so that water is very polar, so polar that at any given instant, the attraction of the oxygen atom for electrons will literally draw an electron away from a hydrogen, or in fact, the water molecule ionizes. At any time, a fixed proportion (specifically 10
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: -7 ) of a volume of water will be: H + (Hydrogen ions) OH-(Hydroxide ions) and the rest of the water will be: H 2 O (Water molecules) This phenomenon of water dissociation has bearing on a whole class of substances which contain hydrogen or hydroxide ions: Acids and Bases, Plus Salts. Acid A substance which liberates H + in solution Base or alkaline substance A substance which combines with H + in solution A substance which donates OH-to solution Salt • An ionic compound which can be formed which an acid and base react. (Water is also formed along with the salt.) • Salts dissociate into ions in solution. • Many minerals needed for living organisms are salts. Some examples: Ca ++ Fe ++ or Fe +++ K + Na + Cl-...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern