Download presentation
Presentation is loading. Please wait.
Published byAllen Owens Modified over 8 years ago
1
2.2 The Water Molecule Polarity A water molecule is polar because there is an uneven distribution of electrons between the O and H atoms
3
Cohesion Attraction between molecules of the same substance Molecules on the surface of water are drawn inward (water beads)
4
Adhesion Attraction between molecules of different substances Ex: Water – Glass Capillary action- water will rise in a narrow tube Ex: roots of a plant
5
Solutions and Suspension Mixture- material composed of 2 or more substances, physically mixed together Salt & pepper, Earth’s atmosphere
6
Solutions Components are evenly distributed Solute - Solvent -
7
Suspension Mixture of water and non-dissolved material Many biological fluids are solutions and suspensions (ex. Blood)
8
Acids, Bases, pH Water Hydrogen + Hydroxide ion ion
9
pH scale Shows the concentration of H + ions in solution 0-14 Pure water = 7, neutral <7=acidic, more H + ions than OH - ion >7=_____________, more _______ than ___________. Each step on scale represents a factor of 10
10
Acids compound that forms _____ in solution Higher concentrations of _____ ions than pure water pH value = __________ Strong acids, pH = 1-3 Ex. Of acid in your body?
11
Bases Produces hydroxide ions in solution Alkaline solutions contain lower concentrations of _______than pure water pH values = ___________ Strong bases, pH=11-14
12
Buffers pH of fluids in cells of human must be kept at 6.5-7.5 Lower or higher affects the chem. Reactions in the cells Control pH to maintain homeostasis Buffers-weak acids or bases that react with strong acids or bases to prevent sudden changes in pH
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.