NTI DAY 2 - What kinds of Compounds dissolve in water?

​On the next page, follow the Youtube link to a short video that explains why water is polar.

Drag and Drop

Let's see if you can explain why water is polar.....

The Hydrogens would be partially ​

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and the oxygen would be partially ​

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, because the ​

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would spend more time around Oxygen.

Drag these tiles and drop them in the correct blank above

Positive

Negative

electrons

protons

​Image 1 Image 2

Multiple Choice

Watch the 30 second video and then answer the question below.

Why does the phrase "like dissolves like" explain why isopropyl alcohol dissolves in water?

• Water is polar and alcohol is nonpolar. They are not alike and will not attract.

• Both water and alcohol are polar molecules. Like substances will dissolve in each other.

Multiple Choice

Watch the 30 second video of the interaction of water and oil.

Which of the following is true?

• Water and Oil are both polar and mix together well.

• Water will only mix with other Polar substances. Oil is Nonpolar.

Multiple Choice

Watch the 30 second demo then answer the question.

Cornsyrup (Sugar) is a __________ molecule because it will dissolve in water.

• Polar

• Nonpolar

• Ionic

• KEY CONCEPTS:

• Polar liquids, like water, dissolve other liquids which are polar, a little polar or ionic.

  • IONIC compounds = Metal + Nonmetal

  • Covalent= Nonmetal + Nonmetal

    • Polar Covalent

    • Nonpolar Covalent

• Polar liquids, like water, do not dissolve nonpolar liquids like oil.

• Nonpolar liquids like oil dissolve best in other nonpolar substances.

Multiple Choice

NH3, Ammonia.... Will it dissolve best in water or Oil??

• Oil because it is nonpolar

• Water because it is polar

Multiple Choice

This is a molecule of Butane. Butane consists of all Hydrocarbon bonds. Will it dissolve best in oil or water?

• Oil

• Water

Multiple Choice

Sulfur Dioxide, SO2, Will dissolve best in ________

• Oil

• Water

Multiple Choice

You have an oil based paint on your paint brush.

You want to remove the paint.

What kind of solvent from the list should you use to wash it?

• Water

• Ethanol

• Hexane

Categorize

Options (12)

POLAR MOLECULES

MOST IONIC COMPOUNDS

NONPOLAR MOLECULES

WAX

FAT

OIL

GLASS

SALTS

SUGAR

AMMONIA (Used in Windex)

MOLECULES That have areas of positive and negative Charge

Molecules that do not have any Charge

Practice what you have learned.......Categorize the following:

These Will Dissolve In Water...

These Will NOT Dissolve in Water

Poll

I can decide if a substance will or will not dissolve in water by studying if the substance is Polar or Nonpolar.

Rate your confidence:

I will be available during the Google Meet Class times for questions. Or You can email me.

• I am very confident in this target

• I can get these right most of the time.

• I am pretty lost on how to determine this objective.