solutions and ph n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Solutions and pH PowerPoint Presentation
Download Presentation
Solutions and pH

Loading in 2 Seconds...

play fullscreen
1 / 10

Solutions and pH - PowerPoint PPT Presentation


  • 94 Views
  • Uploaded on

Solutions and pH. What is a Mixture?. A mixture is a material compound Mixtures are made of two or more elements or compounds that are physically mixed together but not chemically combined Example: Earth’s atmosphere is a mixture of gases.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Solutions and pH' - lok


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
what is a mixture
What is a Mixture?
  • A mixture is a material compound
  • Mixtures are made of two or more elements or compounds that are physically mixed together but not chemically combined
  • Example: Earth’s atmosphere is a mixture of gases
slide3

A homogeneous mixture is a mixture that is uniform (the same) in composition throughout.

    • Example: Food coloring and water
  • A heterogeneous mixture is a mixture that is not uniform (the same) throughout
    • Example: Oil and Water
3 types of mixtures
3 Types of Mixtures
  • Solution – a homogeneous mixture
  • Suspension – a mixture in which the particles are so large that they settle out unless the mixture in constantly stirred
    • Example: Sand in Water
  • Colloid – a mixture consisting of particles that are intermediate in size between those in solutions and those in suspensions
    • Example: Milk
what makes up a solution
What makes up a solution?
  • Solvent – the substance that does the dissolving in a solution
    • Typically present in the greatest quantity
    • Typically a liquid
    • Water is the “universal solvent”
  • Solute – the substance that is being dissolved in a solution
    • Typically present in the least amount
    • Typically a solid (can be a liquid)
ph scale
pH Scale
  • The pH scale indicates the concentration of H+ ions in a solution
  • The pH scale ranges from 0 to 14
  • A pH of 7 is considered to be neutral
  • Water has a pH of 7
  • pH values below 7 are considered to be acidic
  • pH values above 7 are considered to be basic
what are acids
What are acids?
  • An acid is any compound that forms H+ ions when in solution.
  • Acidic solutions have higher concentrations of H+ ions than pure water
  • pH < 7
  • The strongest acids have a pH between 1 and 3, 1 being the strongest acid
  • Example: Hydrochloric acid produced by the stomach
what are bases
What are bases?
  • A base is a compound that produces OH- ions when in a solution.
  • Solutions that are basic have less H+ ions that pure water
  • pH > 7
  • Strong bases have a pH between 11-14, with 14 being the strongest
how is ph maintained in the human body
How is pH maintained in the human body?
  • The human body has a pH between 6.5-7.5
  • This pH must be maintained or chemical reactions that take place in the cells may not occur
  • Buffers are weak acids or bases that can react with strong acids or bases to maintain a relatively steady pH
  • Buffers help keep human blood at a pH of roughly 7