Unit 12: Solutions

How many grams of K₂Cr₂O₇, are soluble in 100 g of water at 90 ºC?

• 85 grams

• 70 grams

• 40 grams

• 15 grams

Tags

NGSS.HS-PS3-4

You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:

• saturated

• unsaturated

• concentrated

• warm

Contains the maximum amount of dissolved solute

• unsaturated solution
• supersaturated solution
• saturated solution

Using the supplied solubility curve diagram, determine what type of solution would be present if 50 grams of NH₃ was dissolved in 100 grams of water at 30°C.

• saturated

• unsaturated

• supersaturated

Why is water the universal solvent? 

• The polar nature of its molecules

• It is widely available

• It is a covalent compound

• Water is wet

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

The substance being dissolved in a solution is the?

• solution

• solute

• solvent

• mixture

Identify if the following solution would be saturated, unsaturated, or supersaturated: 103 g KBr at 70'C.

• Unsaturated

• Saturated

• Supersaturated

Identify how many grams of KNO3 is required to make a saturated solution at 40'C.

• 50 g

• 45 g

• 60 g

• 33 g

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

• 83 grams
• 75 grams
• 40 grams
• 12 grams