Unit 7 Exam Review -...

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Unit 7 Exam Review

Transcript of Unit 7 Exam Review -...

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Unit 7 Exam Review

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What’s the difference?

DISSOCIATION & SOLVATION

SOLVATION ONLY

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How much KCl can you dissolve at 40°C in 300 g H2O?

40 g × 3 = 120 g KCl

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What type of solution?

STRONG ACID

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Which indicator would you use to titrate a weak acid with a strong base?

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Which is the solute?

ALCOHOL ACETONE

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Which graph represents the relationship between vapor pressure and the amount of dissolved solute 

particles?

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Which graph represents the relationship between freezing point and the amount of dissolved solute 

particles?

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Which graph represents the relationship between boiling point and 

the amount of dissolved solute particles?

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Which graph represents the relationship between boiling point and 

vapor pressure?

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Which has the higher pH?

H+H+ H+

H+

H+

H+H+H+

H+ H+H+

H+

H+H+

OH-OH- OH-OH-

OH-OH-OH- OH-

OH-OH-OH- OH-OH-OH-

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Which is the most common particle found in distilled water?

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40 mL and 5.0 M  how would you find g?

molM = 

V

mol = M V→ ×

change mol to g (use MM)

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1.9 L of 0.28 M diluted to 0.16 M.How would you find volume of 

water added?

1 1 2 2M V  = M V

2 1 2V  ‐ V  = vol H O added

1 12

2

M VV  = 

M→

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What can you do to make the salt dissolve more quickly?

1) ↑ temp2) Break into 

smaller pieces (↑ surface area)

3) Stir 

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What causes soda to go flat?

↑ temp or ↓ pressure

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What property of oil causes this type of mixture?

Oil is nonpolar, and water is polar

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The products are KNO3 and H2O.  What type of reaction formed 

these products?

NEUTRALIZATION RXN (DOUBLE‐REPLACEMENT)

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The products are KNO3 and H2O.  What were the reactants?

HNO3 + KOH KNO3 + H2O

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How do you know something is a strong base based on its formula?

‐OH ion with an alkali or alkaline earth metal cation

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How do you know something is an acid based on its formula?

H in front of formula

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AgCl is a salt.  Explain why it would stays solid in water.

Salt cannot by dissociated nor solvated by polar water molecules