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STAAR Ladder to Success Rung 5
17

STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Jan 01, 2016

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Gerard Craig
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Page 1: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

STAAR Ladder to Success

Rung 5

Page 2: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Polarity

– The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates a slight charge on each end of the water molecule.

Page 3: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Hydrogen Bonding

• The force of attraction between the hydrogen atom of one water molecule to the oxygen atom of another water molecule

• Easily done because of water’s bent shape- allowing the hydrogen to bond.

Page 4: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

How does the structure of water relate to its nickname, “ the universal

solvent”?

A. It has a positive end and a negative end, and can therefore dissolve many compounds.

B. It has a very low specific heat.C. It loses heat very quickly.D. It has no electric charge and is therefore

able to associate with a variety of molecules.

Page 5: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Curve

• On the line = saturated

• Below the line = Unsaturated

• Above the line = Supersaturated

Page 6: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Solubility Rules

Page 7: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Molarity

• Concentration of a solution.

solution of liters

solute of moles(M)Molarity

total combined volume

substance being dissolved

Page 8: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

• Example #1: What is the molarity of the solution if .25 moles of Na2SO4 is dissolved in 1.5 L solution?

Page 9: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

• Example #2: If you had a 2M solution of glucose (C6H12O6) how many liters of the solution would contain 3 moles glucose?

Page 10: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

• Example #3: Calculate the molarity of .51L of solution that contains 110g of NaCl.

Page 11: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

2211 VMVM

Dilution

• Preparation of a desired solution by adding water to a concentrate ( stock solution).

• Moles of solute remain the same.

Page 12: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

• Example #1: What volume of .5M NaOH is needed to make a .075 M in 2L solution?

Page 13: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Electrolytes

StrongElectrolyte

Non-Electrolyte

- +

salt

- +

sugar

- +

acetic acid

WeakElectrolyte

Page 14: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

SATURATED SOLUTIONno more solute dissolves

UNSATURATED SOLUTIONmore solute dissolves

SUPERSATURATED SOLUTIONbecomes unstable, crystals form

concentration

Page 15: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Rate of Solution

• Solids dissolve faster...

– more stirring

– small particle size(increased surface area)

– high temperature

Page 16: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

Rate of Solution

• Gases dissolve faster...

– no shaking or stirring

– high pressure

– low temperature

Page 17: STAAR Ladder to Success Rung 5. Polarity – The oxygen atom is bigger than the hydrogen atoms, the electrons spend more time around the oxygen. This creates.

A solution that contains less solute than it can hold at a given temperature is

A. disassociated.B. saturated.C. supersaturated.D. unsaturated