Study Guide Chapter 3 1 What are the four emergent properties of water that contribute to Earth s sustainability for life Explain each property in your own words a Cohesive behavior i Cohesion water bonding to water ii Adhesion water bonding to something else water in plant cells b Ability to moderate temperature i Water has a high specific heat it takes a lot of energy to break the hydrogen bonds ii Why can water absorb or energy a lot of heat without changing 1 The molecules ability to move is limited by the hydrogen bonds therefore resisting a lot motion which resists changes in temperature c Expansion upon freezing i Why is water less dense as a solid 1 The hydrogen bonds in ice are more ordered with little motion which causes the bonds to stretch out a little make more space between molecules making ice less dense ii Density mass volume 1 Ex Density of liquid 100 10 10 Density of solid 100 20 5 takes up more space but has same about of molecules so they are spread out d Versatility as a solvent i Hydration shell When an ionic compound is dissolved in water each ion is surrounded by a sphere of water molecules called a hydration shell 2 The four properties of water are attributed to what characteristic of water 3 A single water molecule can bond with how many other water molecules What type of bond holds a water molecule together and what type of bond is formed between these water molecules 4 How are plants able to transport water against the pull of gravity 5 Why can some small insects walk on the surface of water Surface tension 6 Why is it important that water has a high specific heat 7 Why does water make such a versatile solvent 8 What does it mean if a molecule is hydrophilic or hydrophobic 9 What are the properties of acids and bases 10 If the Hydrogen ion concentration of a solution is 10 3 what is the pH of the solution 11 What is the relationship between pH and H 12 What is the pH scale What pH values indicate an acidic solution a basic solution and a neutral solution 13 Molecular mass Daltons mass multiplied by amount a C6 12 Da x 6 72 Da 14 Molarity of moles volume in liters a M 1 mole of Glu 1 L of H2O 1M solution 180g in 1L 15 What is the molecular mass of NH3 Show your work 16 How many molecules make up one mole of NaCl 17 What is the mass of one mole of C2H4O2
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