Water and Solutions Review

True or false water is a polar molecule? 

• True 

• False 

Tags

NGSS.MS-PS1-1

In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

• stir the powder in the liquid

• freeze the mixture

• add more powder to the liquid

• store the mixture in a dark place

Which substance is MOST soluble at 0 ºC?

• KI

• NaNO₃

• NaCl

• Ce₂(SO₄)₃

Tags

NGSS.MS-PS1-2

How many grams of K₂Cr₂O₇, are soluble in 100 g of water at 95 ºC?

• 83 grams

• 75 grams

• 40 grams

• 12 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following is a property of aqueous solutions?

• They are always acidic

• They can conduct electricity if they contain ions

• They are always colorless

• They cannot dissolve gases

Which of the following is a strong electrolyte?

• Sugar

• NaCl

• Oil

• Ethanol

What is a nonelectrolyte?

• A substance that completely ionizes in water

• A substance that partially ionizes in water

• A substance that does not ionize in water

• A substance that conducts electricity in water

When 20 grams of potassium chlorate, KClO₃, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:

• supersaturated

• unsaturated

• saturated

What word describes when water is attracted to other substances?

• cohesion

• adhesion

• capillary action

• surface tension