1 / 13

Solutions and pH

Solutions and pH. Solutions. Mixtures – a combination of substances that retain their original properties Ex. trail mix, air, salt water. Solutions. Solution – mixture of one or more substances uniformly distributed in another substance . Can be solid, liquid, gas ex. Plasma (liquid)

luke-boyer
Download Presentation

Solutions and pH

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. Solutions and pH

  2. Solutions Mixtures – a combination of substances that retain their original properties Ex. trail mix, air, salt water

  3. Solutions Solution – mixture of one or more substances uniformly distributed in another substance. Can be solid, liquid, gas ex. Plasma (liquid) brass (solid) copper and zinc soda (liquid/gas) water and CO2

  4. Solutions 2 parts: 1. Solute – substance being dissolved 2. Solvent- substance doing dissolving Salt water: salt = solute water = solvent Aqueous solutions- water is the solvent due to hydrogen bonding Water = universal solvent because it can dissolve most things

  5. Concentration Concentration- amount of solute dissolved in a fixed amount of solution When no more solute can be dissolved….solution is SATURATED Salt will no longer dissolve 

  6. Acids & Bases The Homeostasis of living things depends on the degree of acidity (acid) and alkalinity (base) in certain areas

  7. Water • Acids and bases are solutions made by the dissociation of water • Water naturally breaks down into ions of opposite charges, this is called dissociation. • Water will form these ions naturally (H3O+ & OH-) and in EQUAL amounts. H2O  H+ + OH- This is why water is NEUTRAL! Hydronium (H3O+) ions = hydroxide (OH- ) ions

  8. Acids & Bases Acidity= measure of the amount of Hydronium (H3O+) ions dissolved in a solution. Alkalinity (AKA basic solution)= measure of the amount of hydroxide (OH- ) ions dissolves in a solution

  9. Acids - more H+ ions released • pH < 7 • Sour taste • Corrosive on metals • Burns skin • Ex. Orange juice, • vinegar, sulfuric acid *Homeostasis relevance- your stomach must have a certain acidity to function properly

  10. Bases -more OH- ions released • pH > 7 • Tastes bitter • Slippery • Irritate the skin • Ex. NaOH • Homeostasis relevance- your small intestine needs a certain alkalinity (basic) to function properly

  11. Used to measure the amounts of H3O+ and OH- ions in a solution Tells you how acidic or basic something is Ranges 0-14, 7 = neutral above 7 = base below 7 = acid Ten fold system Measure pH with litmus paper pH Scale

  12. Buffers Buffers- chemical substances that neutralize small amounts of acids and bases Ex. Acids { stomach acid & urine Ex. Bases { blood & intestinal fluid • If not at the proper pH level, these body systems will not function properly and… you’ll need to use a Buffer ex. Alka seltzer

More Related