Properties of water

Properties of Water ,[object Object],[object Object],[object Object],[object Object],[object Object]

Polarity of Water ,[object Object],[object Object],[object Object],[object Object]

HYDROGEN BONDS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Organisms Depend on Cohesion ,[object Object],[object Object],[object Object],Hydrogen bonds hold the substance together, a phenomenon called cohesion

Moderates Temperatures on Earth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object], Water stabilizes air temperatures by absorbing heat from warmer air and releasing heat to cooler air. Water can absorb or release relatively large amounts of heat with only a slight change in its own temperature. Celsius Scale at Sea Level 100 o C Water boils 37 o C Human body temperature 23 o C Room temperature 0 o C Water freezes

Specific Heat is the amount of heat that must be absorbed or lost for one gram of a substance to change its temperature by 1 o C . ,[object Object],[object Object],[object Object],[object Object]

Evaporative Cooling ,[object Object],[object Object],[object Object],[object Object],[object Object]

Density of Water ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solvent for Life ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Most biochemical reactions involve solutes dissolved in water. ,[object Object],[object Object],[object Object]

Concentration of a Solution ,[object Object],[object Object],[object Object],[object Object]

Molarity ,[object Object],[object Object],Calculate a one molar solution of sucrose, C 12 H 22 O 16 . C = 12 daltons H = 1 dalton O = 16 daltons 12 x12 = 144 1 x 22 = 22 16 x 11 = 176 342 For a 2M solution? For a .05 M solution? For a .2 M solution?

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Acids and Bases ,[object Object],[object Object],[object Object],[object Object],[object Object]

pH Scale ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problem How much greater is the [ H + ] in a solution with pH 2 than in a solution with pH 6? Answer: pH of 2 = [ H + ] of 1.0 x 10 -2 = 1/100 M pH of 6 = [ H + ] of 1.0 x 10 -6 = 1/1,000,000 M 10,000 times greater

Buffers ,[object Object],[object Object],[object Object],[object Object]

Acid Precipitation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Properties of water

Empfohlen

Empfohlen

Weitere ähnliche Inhalte

Was ist angesagt?

Was ist angesagt? (20)

Ähnlich wie Properties of water

Ähnlich wie Properties of water (20)

Kürzlich hochgeladen

Kürzlich hochgeladen (20)

Properties of water

Hinweis der Redaktion